2661 lines
80 KiB
ReStructuredText
2661 lines
80 KiB
ReStructuredText
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
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.. _codec-controls:
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***********************
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Codec Control Reference
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***********************
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Below all controls within the Codec control class are described. First
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the generic controls, then controls specific for certain hardware.
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.. note::
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These controls are applicable to all codecs and not just MPEG. The
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defines are prefixed with V4L2_CID_MPEG/V4L2_MPEG as the controls
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were originally made for MPEG codecs and later extended to cover all
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encoding formats.
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Generic Codec Controls
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======================
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.. _mpeg-control-id:
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Codec Control IDs
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-----------------
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``V4L2_CID_CODEC_CLASS (class)``
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The Codec class descriptor. Calling
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:ref:`VIDIOC_QUERYCTRL` for this control will
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return a description of this control class. This description can be
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used as the caption of a Tab page in a GUI, for example.
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.. _v4l2-mpeg-stream-type:
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``V4L2_CID_MPEG_STREAM_TYPE``
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(enum)
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enum v4l2_mpeg_stream_type -
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The MPEG-1, -2 or -4 output stream type. One cannot assume anything
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here. Each hardware MPEG encoder tends to support different subsets
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of the available MPEG stream types. This control is specific to
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multiplexed MPEG streams. The currently defined stream types are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_PS``
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- MPEG-2 program stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_TS``
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- MPEG-2 transport stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG1_SS``
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- MPEG-1 system stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_DVD``
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- MPEG-2 DVD-compatible stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG1_VCD``
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- MPEG-1 VCD-compatible stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD``
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- MPEG-2 SVCD-compatible stream
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``V4L2_CID_MPEG_STREAM_PID_PMT (integer)``
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Program Map Table Packet ID for the MPEG transport stream (default
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16)
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``V4L2_CID_MPEG_STREAM_PID_AUDIO (integer)``
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Audio Packet ID for the MPEG transport stream (default 256)
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``V4L2_CID_MPEG_STREAM_PID_VIDEO (integer)``
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Video Packet ID for the MPEG transport stream (default 260)
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``V4L2_CID_MPEG_STREAM_PID_PCR (integer)``
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Packet ID for the MPEG transport stream carrying PCR fields (default
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259)
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``V4L2_CID_MPEG_STREAM_PES_ID_AUDIO (integer)``
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Audio ID for MPEG PES
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``V4L2_CID_MPEG_STREAM_PES_ID_VIDEO (integer)``
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Video ID for MPEG PES
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.. _v4l2-mpeg-stream-vbi-fmt:
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``V4L2_CID_MPEG_STREAM_VBI_FMT``
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(enum)
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enum v4l2_mpeg_stream_vbi_fmt -
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Some cards can embed VBI data (e. g. Closed Caption, Teletext) into
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the MPEG stream. This control selects whether VBI data should be
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embedded, and if so, what embedding method should be used. The list
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of possible VBI formats depends on the driver. The currently defined
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VBI format types are:
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.. tabularcolumns:: |p{6.6 cm}|p{10.9cm}|
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_STREAM_VBI_FMT_NONE``
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- No VBI in the MPEG stream
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* - ``V4L2_MPEG_STREAM_VBI_FMT_IVTV``
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- VBI in private packets, IVTV format (documented in the kernel
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sources in the file
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``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst``)
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.. _v4l2-mpeg-audio-sampling-freq:
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``V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ``
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(enum)
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enum v4l2_mpeg_audio_sampling_freq -
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MPEG Audio sampling frequency. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100``
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- 44.1 kHz
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* - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000``
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- 48 kHz
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* - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000``
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- 32 kHz
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.. _v4l2-mpeg-audio-encoding:
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``V4L2_CID_MPEG_AUDIO_ENCODING``
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(enum)
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enum v4l2_mpeg_audio_encoding -
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MPEG Audio encoding. This control is specific to multiplexed MPEG
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streams. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_1``
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- MPEG-1/2 Layer I encoding
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* - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_2``
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- MPEG-1/2 Layer II encoding
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* - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_3``
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- MPEG-1/2 Layer III encoding
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* - ``V4L2_MPEG_AUDIO_ENCODING_AAC``
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- MPEG-2/4 AAC (Advanced Audio Coding)
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* - ``V4L2_MPEG_AUDIO_ENCODING_AC3``
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- AC-3 aka ATSC A/52 encoding
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.. _v4l2-mpeg-audio-l1-bitrate:
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``V4L2_CID_MPEG_AUDIO_L1_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_l1_bitrate -
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MPEG-1/2 Layer I bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_288K``
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- 288 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_320K``
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- 320 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_352K``
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- 352 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_384K``
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- 384 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_416K``
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- 416 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_448K``
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- 448 kbit/s
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.. _v4l2-mpeg-audio-l2-bitrate:
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``V4L2_CID_MPEG_AUDIO_L2_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_l2_bitrate -
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MPEG-1/2 Layer II bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_48K``
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- 48 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_56K``
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- 56 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_80K``
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- 80 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_112K``
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- 112 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_320K``
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- 320 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_384K``
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- 384 kbit/s
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.. _v4l2-mpeg-audio-l3-bitrate:
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``V4L2_CID_MPEG_AUDIO_L3_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_l3_bitrate -
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MPEG-1/2 Layer III bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_40K``
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- 40 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_48K``
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- 48 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_56K``
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- 56 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_80K``
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- 80 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_112K``
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- 112 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_320K``
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- 320 kbit/s
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``V4L2_CID_MPEG_AUDIO_AAC_BITRATE (integer)``
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AAC bitrate in bits per second.
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.. _v4l2-mpeg-audio-ac3-bitrate:
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``V4L2_CID_MPEG_AUDIO_AC3_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_ac3_bitrate -
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AC-3 bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_40K``
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- 40 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_48K``
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- 48 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_56K``
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- 56 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_80K``
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- 80 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_112K``
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- 112 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_320K``
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- 320 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_384K``
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- 384 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_448K``
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- 448 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_512K``
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- 512 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_576K``
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- 576 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_640K``
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- 640 kbit/s
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.. _v4l2-mpeg-audio-mode:
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``V4L2_CID_MPEG_AUDIO_MODE``
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(enum)
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enum v4l2_mpeg_audio_mode -
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MPEG Audio mode. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_MODE_STEREO``
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- Stereo
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* - ``V4L2_MPEG_AUDIO_MODE_JOINT_STEREO``
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- Joint Stereo
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* - ``V4L2_MPEG_AUDIO_MODE_DUAL``
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- Bilingual
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* - ``V4L2_MPEG_AUDIO_MODE_MONO``
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- Mono
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.. _v4l2-mpeg-audio-mode-extension:
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``V4L2_CID_MPEG_AUDIO_MODE_EXTENSION``
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(enum)
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enum v4l2_mpeg_audio_mode_extension -
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Joint Stereo audio mode extension. In Layer I and II they indicate
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which subbands are in intensity stereo. All other subbands are coded
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in stereo. Layer III is not (yet) supported. Possible values are:
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.. tabularcolumns:: |p{9.1cm}|p{8.4cm}|
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4``
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- Subbands 4-31 in intensity stereo
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_8``
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- Subbands 8-31 in intensity stereo
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_12``
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- Subbands 12-31 in intensity stereo
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16``
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- Subbands 16-31 in intensity stereo
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.. _v4l2-mpeg-audio-emphasis:
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``V4L2_CID_MPEG_AUDIO_EMPHASIS``
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(enum)
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enum v4l2_mpeg_audio_emphasis -
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Audio Emphasis. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_EMPHASIS_NONE``
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- None
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* - ``V4L2_MPEG_AUDIO_EMPHASIS_50_DIV_15_uS``
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- 50/15 microsecond emphasis
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* - ``V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17``
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- CCITT J.17
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.. _v4l2-mpeg-audio-crc:
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``V4L2_CID_MPEG_AUDIO_CRC``
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(enum)
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enum v4l2_mpeg_audio_crc -
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CRC method. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_CRC_NONE``
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- None
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* - ``V4L2_MPEG_AUDIO_CRC_CRC16``
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- 16 bit parity check
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``V4L2_CID_MPEG_AUDIO_MUTE (boolean)``
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Mutes the audio when capturing. This is not done by muting audio
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hardware, which can still produce a slight hiss, but in the encoder
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itself, guaranteeing a fixed and reproducible audio bitstream. 0 =
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unmuted, 1 = muted.
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.. _v4l2-mpeg-audio-dec-playback:
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``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK``
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(enum)
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enum v4l2_mpeg_audio_dec_playback -
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Determines how monolingual audio should be played back. Possible
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values are:
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.. tabularcolumns:: |p{9.8cm}|p{7.7cm}|
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_AUTO``
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- Automatically determines the best playback mode.
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* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_STEREO``
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- Stereo playback.
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* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_LEFT``
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- Left channel playback.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_RIGHT``
|
|
- Right channel playback.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_MONO``
|
|
- Mono playback.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_SWAPPED_STEREO``
|
|
- Stereo playback with swapped left and right channels.
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-audio-dec-multilingual-playback:
|
|
|
|
``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_audio_dec_playback -
|
|
Determines how multilingual audio should be played back.
|
|
|
|
.. _v4l2-mpeg-video-encoding:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_ENCODING``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_encoding -
|
|
MPEG Video encoding method. This control is specific to multiplexed
|
|
MPEG streams. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_1``
|
|
- MPEG-1 Video encoding
|
|
* - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_2``
|
|
- MPEG-2 Video encoding
|
|
* - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC``
|
|
- MPEG-4 AVC (H.264) Video encoding
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-aspect:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_ASPECT``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_aspect -
|
|
Video aspect. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_1x1``
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_4x3``
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_16x9``
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_221x100``
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_B_FRAMES (integer)``
|
|
Number of B-Frames (default 2)
|
|
|
|
``V4L2_CID_MPEG_VIDEO_GOP_SIZE (integer)``
|
|
GOP size (default 12)
|
|
|
|
``V4L2_CID_MPEG_VIDEO_GOP_CLOSURE (boolean)``
|
|
GOP closure (default 1)
|
|
|
|
``V4L2_CID_MPEG_VIDEO_PULLDOWN (boolean)``
|
|
Enable 3:2 pulldown (default 0)
|
|
|
|
.. _v4l2-mpeg-video-bitrate-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_BITRATE_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_bitrate_mode -
|
|
Video bitrate mode. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_BITRATE_MODE_VBR``
|
|
- Variable bitrate
|
|
* - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CBR``
|
|
- Constant bitrate
|
|
* - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ``
|
|
- Constant quality
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_BITRATE (integer)``
|
|
Average video bitrate in bits per second.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_BITRATE_PEAK (integer)``
|
|
Peak video bitrate in bits per second. Must be larger or equal to
|
|
the average video bitrate. It is ignored if the video bitrate mode
|
|
is set to constant bitrate.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY (integer)``
|
|
Constant quality level control. This control is applicable when
|
|
``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` value is
|
|
``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ``. Valid range is 1 to 100
|
|
where 1 indicates lowest quality and 100 indicates highest quality.
|
|
Encoder will decide the appropriate quantization parameter and
|
|
bitrate to produce requested frame quality.
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE (enum)``
|
|
|
|
enum v4l2_mpeg_video_frame_skip_mode -
|
|
Indicates in what conditions the encoder should skip frames. If
|
|
encoding a frame would cause the encoded stream to be larger then a
|
|
chosen data limit then the frame will be skipped. Possible values
|
|
are:
|
|
|
|
|
|
.. tabularcolumns:: |p{8.2cm}|p{9.3cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_DISABLED``
|
|
- Frame skip mode is disabled.
|
|
* - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT``
|
|
- Frame skip mode enabled and buffer limit is set by the chosen
|
|
level and is defined by the standard.
|
|
* - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT``
|
|
- Frame skip mode enabled and buffer limit is set by the
|
|
:ref:`VBV (MPEG1/2/4) <v4l2-mpeg-video-vbv-size>` or
|
|
:ref:`CPB (H264) buffer size <v4l2-mpeg-video-h264-cpb-size>` control.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION (integer)``
|
|
For every captured frame, skip this many subsequent frames (default
|
|
0).
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MUTE (boolean)``
|
|
"Mutes" the video to a fixed color when capturing. This is useful
|
|
for testing, to produce a fixed video bitstream. 0 = unmuted, 1 =
|
|
muted.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MUTE_YUV (integer)``
|
|
Sets the "mute" color of the video. The supplied 32-bit integer is
|
|
interpreted as follows (bit 0 = least significant bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:7
|
|
- V chrominance information
|
|
* - Bit 8:15
|
|
- U chrominance information
|
|
* - Bit 16:23
|
|
- Y luminance information
|
|
* - Bit 24:31
|
|
- Must be zero.
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-dec-pts:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DEC_PTS (integer64)``
|
|
This read-only control returns the 33-bit video Presentation Time
|
|
Stamp as defined in ITU T-REC-H.222.0 and ISO/IEC 13818-1 of the
|
|
currently displayed frame. This is the same PTS as is used in
|
|
:ref:`VIDIOC_DECODER_CMD`.
|
|
|
|
.. _v4l2-mpeg-video-dec-frame:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DEC_FRAME (integer64)``
|
|
This read-only control returns the frame counter of the frame that
|
|
is currently displayed (decoded). This value is reset to 0 whenever
|
|
the decoder is started.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR (integer64)``
|
|
This control sets the conceal color in YUV color space. It describes
|
|
the client preference of the error conceal color in case of an error
|
|
where the reference frame is missing. The decoder should fill the
|
|
reference buffer with the preferred color and use it for future
|
|
decoding. The control is using 16 bits per channel.
|
|
Applicable to decoders.
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* -
|
|
- 8bit format
|
|
- 10bit format
|
|
- 12bit format
|
|
* - Y luminance
|
|
- Bit 0:7
|
|
- Bit 0:9
|
|
- Bit 0:11
|
|
* - Cb chrominance
|
|
- Bit 16:23
|
|
- Bit 16:25
|
|
- Bit 16:27
|
|
* - Cr chrominance
|
|
- Bit 32:39
|
|
- Bit 32:41
|
|
- Bit 32:43
|
|
* - Must be zero
|
|
- Bit 48:63
|
|
- Bit 48:63
|
|
- Bit 48:63
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE (boolean)``
|
|
If enabled the decoder expects to receive a single slice per buffer,
|
|
otherwise the decoder expects a single frame in per buffer.
|
|
Applicable to the decoder, all codecs.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE (boolean)``
|
|
If the display delay is enabled then the decoder is forced to return
|
|
a CAPTURE buffer (decoded frame) after processing a certain number
|
|
of OUTPUT buffers. The delay can be set through
|
|
``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY``. This
|
|
feature can be used for example for generating thumbnails of videos.
|
|
Applicable to the decoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY (integer)``
|
|
Display delay value for decoder. The decoder is forced to
|
|
return a decoded frame after the set 'display delay' number of
|
|
frames. If this number is low it may result in frames returned out
|
|
of display order, in addition the hardware may still be using the
|
|
returned buffer as a reference picture for subsequent frames.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_AU_DELIMITER (boolean)``
|
|
If enabled then, AUD (Access Unit Delimiter) NALUs will be generated.
|
|
That could be useful to find the start of a frame without having to
|
|
fully parse each NALU. Applicable to the H264 and HEVC encoders.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
|
|
Enable writing sample aspect ratio in the Video Usability
|
|
Information. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-vui-sar-idc:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_vui_sar_idc -
|
|
VUI sample aspect ratio indicator for H.264 encoding. The value is
|
|
defined in the table E-1 in the standard. Applicable to the H264
|
|
encoder.
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_UNSPECIFIED``
|
|
- Unspecified
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1``
|
|
- 1x1
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_12x11``
|
|
- 12x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_10x11``
|
|
- 10x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_16x11``
|
|
- 16x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_40x33``
|
|
- 40x33
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_24x11``
|
|
- 24x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_20x11``
|
|
- 20x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_32x11``
|
|
- 32x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_80x33``
|
|
- 80x33
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_18x11``
|
|
- 18x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_15x11``
|
|
- 15x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_64x33``
|
|
- 64x33
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_160x99``
|
|
- 160x99
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_4x3``
|
|
- 4x3
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_3x2``
|
|
- 3x2
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_2x1``
|
|
- 2x1
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_EXTENDED``
|
|
- Extended SAR
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH (integer)``
|
|
Extended sample aspect ratio width for H.264 VUI encoding.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT (integer)``
|
|
Extended sample aspect ratio height for H.264 VUI encoding.
|
|
Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_level -
|
|
The level information for the H264 video elementary stream.
|
|
Applicable to the H264 encoder. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_0``
|
|
- Level 1.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1B``
|
|
- Level 1B
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_1``
|
|
- Level 1.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_2``
|
|
- Level 1.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_3``
|
|
- Level 1.3
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_0``
|
|
- Level 2.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_1``
|
|
- Level 2.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_2``
|
|
- Level 2.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_0``
|
|
- Level 3.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_1``
|
|
- Level 3.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_2``
|
|
- Level 3.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_0``
|
|
- Level 4.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_1``
|
|
- Level 4.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_2``
|
|
- Level 4.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_0``
|
|
- Level 5.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_1``
|
|
- Level 5.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_2``
|
|
- Level 5.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_0``
|
|
- Level 6.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_1``
|
|
- Level 6.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_2``
|
|
- Level 6.2
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-mpeg2-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg2_level -
|
|
The level information for the MPEG2 elementary stream. Applicable to
|
|
MPEG2 codecs. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW``
|
|
- Low Level (LL)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN``
|
|
- Main Level (ML)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440``
|
|
- High-1440 Level (H-14)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH``
|
|
- High Level (HL)
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-mpeg4-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg4_level -
|
|
The level information for the MPEG4 elementary stream. Applicable to
|
|
the MPEG4 encoder. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0``
|
|
- Level 0
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B``
|
|
- Level 0b
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_1``
|
|
- Level 1
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_2``
|
|
- Level 2
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3``
|
|
- Level 3
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B``
|
|
- Level 3b
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_4``
|
|
- Level 4
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_5``
|
|
- Level 5
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-h264-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_profile -
|
|
The profile information for H264. Applicable to the H264 encoder.
|
|
Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{10.2cm}|p{7.3cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE``
|
|
- Baseline profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE``
|
|
- Constrained Baseline profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_MAIN``
|
|
- Main profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED``
|
|
- Extended profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH``
|
|
- High profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10``
|
|
- High 10 profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422``
|
|
- High 422 profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE``
|
|
- High 444 Predictive profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA``
|
|
- High 10 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA``
|
|
- High 422 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA``
|
|
- High 444 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA``
|
|
- CAVLC 444 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE``
|
|
- Scalable Baseline profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH``
|
|
- Scalable High profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA``
|
|
- Scalable High Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH``
|
|
- Stereo High profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_MULTIVIEW_HIGH``
|
|
- Multiview High profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_HIGH``
|
|
- Constrained High profile
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
.. _v4l2-mpeg-video-mpeg2-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg2_profile -
|
|
The profile information for MPEG2. Applicable to MPEG2 codecs.
|
|
Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{10.2cm}|p{7.3cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE``
|
|
- Simple profile (SP)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN``
|
|
- Main profile (MP)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE``
|
|
- SNR Scalable profile (SNR)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE``
|
|
- Spatially Scalable profile (Spt)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH``
|
|
- High profile (HP)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW``
|
|
- Multi-view profile (MVP)
|
|
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
.. _v4l2-mpeg-video-mpeg4-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg4_profile -
|
|
The profile information for MPEG4. Applicable to the MPEG4 encoder.
|
|
Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{11.8cm}|p{5.7cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE``
|
|
- Simple profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE``
|
|
- Advanced Simple profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE``
|
|
- Core profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE``
|
|
- Simple Scalable profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY``
|
|
- Advanced Coding Efficiency profile
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MAX_REF_PIC (integer)``
|
|
The maximum number of reference pictures used for encoding.
|
|
Applicable to the encoder.
|
|
|
|
.. _v4l2-mpeg-video-multi-slice-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_multi_slice_mode -
|
|
Determines how the encoder should handle division of frame into
|
|
slices. Applicable to the encoder. Possible values are:
|
|
|
|
|
|
|
|
.. tabularcolumns:: |p{9.6cm}|p{7.9cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE``
|
|
- Single slice per frame.
|
|
* - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``
|
|
- Multiple slices with set maximum number of macroblocks per slice.
|
|
* - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``
|
|
- Multiple slice with set maximum size in bytes per slice.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB (integer)``
|
|
The maximum number of macroblocks in a slice. Used when
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
|
|
``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``. Applicable to the
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES (integer)``
|
|
The maximum size of a slice in bytes. Used when
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
|
|
``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``. Applicable to the
|
|
encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-loop-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_loop_filter_mode -
|
|
Loop filter mode for H264 encoder. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{13.5cm}|p{4.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED``
|
|
- Loop filter is enabled.
|
|
* - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED``
|
|
- Loop filter is disabled.
|
|
* - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY``
|
|
- Loop filter is disabled at the slice boundary.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA (integer)``
|
|
Loop filter alpha coefficient, defined in the H264 standard.
|
|
This value corresponds to the slice_alpha_c0_offset_div2 slice header
|
|
field, and should be in the range of -6 to +6, inclusive. The actual alpha
|
|
offset FilterOffsetA is twice this value.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA (integer)``
|
|
Loop filter beta coefficient, defined in the H264 standard.
|
|
This corresponds to the slice_beta_offset_div2 slice header field, and
|
|
should be in the range of -6 to +6, inclusive. The actual beta offset
|
|
FilterOffsetB is twice this value.
|
|
Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-entropy-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_entropy_mode -
|
|
Entropy coding mode for H264 - CABAC/CAVALC. Applicable to the H264
|
|
encoder. Possible values are:
|
|
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.5cm}|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC``
|
|
- Use CAVLC entropy coding.
|
|
* - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC``
|
|
- Use CABAC entropy coding.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM (boolean)``
|
|
Enable 8X8 transform for H264. Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION (boolean)``
|
|
Enable constrained intra prediction for H264. Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (integer)``
|
|
Specify the offset that should be added to the luma quantization
|
|
parameter to determine the chroma quantization parameter. Applicable
|
|
to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB (integer)``
|
|
Cyclic intra macroblock refresh. This is the number of continuous
|
|
macroblocks refreshed every frame. Each frame a successive set of
|
|
macroblocks is refreshed until the cycle completes and starts from
|
|
the top of the frame. Setting this control to zero means that
|
|
macroblocks will not be refreshed. Note that this control will not
|
|
take effect when ``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD`` control
|
|
is set to non zero value.
|
|
Applicable to H264, H263 and MPEG4 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE (enum)``
|
|
|
|
enum v4l2_mpeg_video_intra_refresh_period_type -
|
|
Sets the type of intra refresh. The period to refresh
|
|
the whole frame is specified by V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD.
|
|
Note that if this control is not present, then it is undefined what
|
|
refresh type is used and it is up to the driver to decide.
|
|
Applicable to H264 and HEVC encoders. Possible values are:
|
|
|
|
.. tabularcolumns:: |p{9.6cm}|p{7.9cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE_RANDOM``
|
|
- The whole frame is completely refreshed randomly
|
|
after the specified period.
|
|
* - ``V4L2_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE_CYCLIC``
|
|
- The whole frame MBs are completely refreshed in cyclic order
|
|
after the specified period.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD (integer)``
|
|
Intra macroblock refresh period. This sets the period to refresh
|
|
the whole frame. In other words, this defines the number of frames
|
|
for which the whole frame will be intra-refreshed. An example:
|
|
setting period to 1 means that the whole frame will be refreshed,
|
|
setting period to 2 means that the half of macroblocks will be
|
|
intra-refreshed on frameX and the other half of macroblocks
|
|
will be refreshed in frameX + 1 and so on. Setting the period to
|
|
zero means no period is specified.
|
|
Note that if the client sets this control to non zero value the
|
|
``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB`` control shall be
|
|
ignored. Applicable to H264 and HEVC encoders.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)``
|
|
Frame level rate control enable. If this control is disabled then
|
|
the quantization parameter for each frame type is constant and set
|
|
with appropriate controls (e.g.
|
|
``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP``). If frame rate control is
|
|
enabled then quantization parameter is adjusted to meet the chosen
|
|
bitrate. Minimum and maximum value for the quantization parameter
|
|
can be set with appropriate controls (e.g.
|
|
``V4L2_CID_MPEG_VIDEO_H263_MIN_QP``). Applicable to encoders.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE (boolean)``
|
|
Macroblock level rate control enable. Applicable to the MPEG4 and
|
|
H264 encoders.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (boolean)``
|
|
Quarter pixel motion estimation for MPEG4. Applicable to the MPEG4
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for H263. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_MIN_QP (integer)``
|
|
Minimum quantization parameter for H263. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_MAX_QP (integer)``
|
|
Maximum quantization parameter for H263. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP (integer)``
|
|
Quantization parameter for an P frame for H263. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP (integer)``
|
|
Quantization parameter for an B frame for H263. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for H264. Valid range: from 0
|
|
to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_MIN_QP (integer)``
|
|
Minimum quantization parameter for H264. Valid range: from 0 to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_MAX_QP (integer)``
|
|
Maximum quantization parameter for H264. Valid range: from 0 to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP (integer)``
|
|
Quantization parameter for an P frame for H264. Valid range: from 0
|
|
to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP (integer)``
|
|
Quantization parameter for an B frame for H264. Valid range: from 0
|
|
to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the H264 I frame to limit I frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the H264 I frame to limit I frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the H264 P frame to limit P frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the H264 P frame to limit P frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the H264 B frame to limit B frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the H264 B frame to limit B frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for MPEG4. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP (integer)``
|
|
Minimum quantization parameter for MPEG4. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP (integer)``
|
|
Maximum quantization parameter for MPEG4. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (integer)``
|
|
Quantization parameter for an P frame for MPEG4. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (integer)``
|
|
Quantization parameter for an B frame for MPEG4. Valid range: from 1
|
|
to 31.
|
|
|
|
.. _v4l2-mpeg-video-vbv-size:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VBV_SIZE (integer)``
|
|
The Video Buffer Verifier size in kilobytes, it is used as a
|
|
limitation of frame skip. The VBV is defined in the standard as a
|
|
mean to verify that the produced stream will be successfully
|
|
decoded. The standard describes it as "Part of a hypothetical
|
|
decoder that is conceptually connected to the output of the encoder.
|
|
Its purpose is to provide a constraint on the variability of the
|
|
data rate that an encoder or editing process may produce.".
|
|
Applicable to the MPEG1, MPEG2, MPEG4 encoders.
|
|
|
|
.. _v4l2-mpeg-video-vbv-delay:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VBV_DELAY (integer)``
|
|
Sets the initial delay in milliseconds for VBV buffer control.
|
|
|
|
.. _v4l2-mpeg-video-hor-search-range:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (integer)``
|
|
Horizontal search range defines maximum horizontal search area in
|
|
pixels to search and match for the present Macroblock (MB) in the
|
|
reference picture. This V4L2 control macro is used to set horizontal
|
|
search range for motion estimation module in video encoder.
|
|
|
|
.. _v4l2-mpeg-video-vert-search-range:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (integer)``
|
|
Vertical search range defines maximum vertical search area in pixels
|
|
to search and match for the present Macroblock (MB) in the reference
|
|
picture. This V4L2 control macro is used to set vertical search
|
|
range for motion estimation module in video encoder.
|
|
|
|
.. _v4l2-mpeg-video-force-key-frame:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (button)``
|
|
Force a key frame for the next queued buffer. Applicable to
|
|
encoders. This is a general, codec-agnostic keyframe control.
|
|
|
|
.. _v4l2-mpeg-video-h264-cpb-size:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE (integer)``
|
|
The Coded Picture Buffer size in kilobytes, it is used as a
|
|
limitation of frame skip. The CPB is defined in the H264 standard as
|
|
a mean to verify that the produced stream will be successfully
|
|
decoded. Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_PERIOD (integer)``
|
|
Period between I-frames in the open GOP for H264. In case of an open
|
|
GOP this is the period between two I-frames. The period between IDR
|
|
(Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE
|
|
control. An IDR frame, which stands for Instantaneous Decoding
|
|
Refresh is an I-frame after which no prior frames are referenced.
|
|
This means that a stream can be restarted from an IDR frame without
|
|
the need to store or decode any previous frames. Applicable to the
|
|
H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-header-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEADER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_header_mode -
|
|
Determines whether the header is returned as the first buffer or is
|
|
it returned together with the first frame. Applicable to encoders.
|
|
Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{10.3cm}|p{7.2cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE``
|
|
- The stream header is returned separately in the first buffer.
|
|
* - ``V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME``
|
|
- The stream header is returned together with the first encoded
|
|
frame.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER (boolean)``
|
|
Repeat the video sequence headers. Repeating these headers makes
|
|
random access to the video stream easier. Applicable to the MPEG1, 2
|
|
and 4 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER (boolean)``
|
|
Enabled the deblocking post processing filter for MPEG4 decoder.
|
|
Applicable to the MPEG4 decoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_RES (integer)``
|
|
vop_time_increment_resolution value for MPEG4. Applicable to the
|
|
MPEG4 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_INC (integer)``
|
|
vop_time_increment value for MPEG4. Applicable to the MPEG4
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING (boolean)``
|
|
Enable generation of frame packing supplemental enhancement
|
|
information in the encoded bitstream. The frame packing SEI message
|
|
contains the arrangement of L and R planes for 3D viewing.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0 (boolean)``
|
|
Sets current frame as frame0 in frame packing SEI. Applicable to the
|
|
H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-sei-fp-arrangement-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_sei_fp_arrangement_type -
|
|
Frame packing arrangement type for H264 SEI. Applicable to the H264
|
|
encoder. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{12cm}|p{5.5cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD``
|
|
- Pixels are alternatively from L and R.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN``
|
|
- L and R are interlaced by column.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW``
|
|
- L and R are interlaced by row.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE``
|
|
- L is on the left, R on the right.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM``
|
|
- L is on top, R on bottom.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL``
|
|
- One view per frame.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO (boolean)``
|
|
Enables flexible macroblock ordering in the encoded bitstream. It is
|
|
a technique used for restructuring the ordering of macroblocks in
|
|
pictures. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-fmo-map-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_fmo_map_type -
|
|
When using FMO, the map type divides the image in different scan
|
|
patterns of macroblocks. Applicable to the H264 encoder. Possible
|
|
values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{12.5cm}|p{5.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES``
|
|
- Slices are interleaved one after other with macroblocks in run
|
|
length order.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES``
|
|
- Scatters the macroblocks based on a mathematical function known to
|
|
both encoder and decoder.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER``
|
|
- Macroblocks arranged in rectangular areas or regions of interest.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT``
|
|
- Slice groups grow in a cyclic way from centre to outwards.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN``
|
|
- Slice groups grow in raster scan pattern from left to right.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN``
|
|
- Slice groups grow in wipe scan pattern from top to bottom.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT``
|
|
- User defined map type.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP (integer)``
|
|
Number of slice groups in FMO. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-fmo-change-direction:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_fmo_change_dir -
|
|
Specifies a direction of the slice group change for raster and wipe
|
|
maps. Applicable to the H264 encoder. Possible values are:
|
|
|
|
.. tabularcolumns:: |p{9.6cm}|p{7.9cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT``
|
|
- Raster scan or wipe right.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT``
|
|
- Reverse raster scan or wipe left.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE (integer)``
|
|
Specifies the size of the first slice group for raster and wipe map.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH (integer)``
|
|
Specifies the number of consecutive macroblocks for the interleaved
|
|
map. Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_ASO (boolean)``
|
|
Enables arbitrary slice ordering in encoded bitstream. Applicable to
|
|
the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER (integer)``
|
|
Specifies the slice order in ASO. Applicable to the H264 encoder.
|
|
The supplied 32-bit integer is interpreted as follows (bit 0 = least
|
|
significant bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:15
|
|
- Slice ID
|
|
* - Bit 16:32
|
|
- Slice position or order
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING (boolean)``
|
|
Enables H264 hierarchical coding. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-hierarchical-coding-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_hierarchical_coding_type -
|
|
Specifies the hierarchical coding type. Applicable to the H264
|
|
encoder. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B``
|
|
- Hierarchical B coding.
|
|
* - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P``
|
|
- Hierarchical P coding.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER (integer)``
|
|
Specifies the number of hierarchical coding layers. Applicable to
|
|
the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP (integer)``
|
|
Specifies a user defined QP for each layer. Applicable to the H264
|
|
encoder. The supplied 32-bit integer is interpreted as follows (bit
|
|
0 = least significant bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:15
|
|
- QP value
|
|
* - Bit 16:32
|
|
- Layer number
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR (integer)``
|
|
Indicates bit rate (bps) for hierarchical coding layer 0 for H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR (integer)``
|
|
Indicates bit rate (bps) for hierarchical coding layer 1 for H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR (integer)``
|
|
Indicates bit rate (bps) for hierarchical coding layer 2 for H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR (integer)``
|
|
Indicates bit rate (bps) for hierarchical coding layer 3 for H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR (integer)``
|
|
Indicates bit rate (bps) for hierarchical coding layer 4 for H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR (integer)``
|
|
Indicates bit rate (bps) for hierarchical coding layer 5 for H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR (integer)``
|
|
Indicates bit rate (bps) for hierarchical coding layer 6 for H264 encoder.
|
|
|
|
``V4L2_CID_FWHT_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for FWHT. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_FWHT_P_FRAME_QP (integer)``
|
|
Quantization parameter for a P frame for FWHT. Valid range: from 1
|
|
to 31.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
MFC 5.1 MPEG Controls
|
|
=====================
|
|
|
|
The following MPEG class controls deal with MPEG decoding and encoding
|
|
settings that are specific to the Multi Format Codec 5.1 device present
|
|
in the S5P family of SoCs by Samsung.
|
|
|
|
|
|
.. _mfc51-control-id:
|
|
|
|
MFC 5.1 Control IDs
|
|
-------------------
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE (boolean)``
|
|
If the display delay is enabled then the decoder is forced to return
|
|
a CAPTURE buffer (decoded frame) after processing a certain number
|
|
of OUTPUT buffers. The delay can be set through
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY``. This
|
|
feature can be used for example for generating thumbnails of videos.
|
|
Applicable to the H264 decoder.
|
|
|
|
.. note::
|
|
|
|
This control is deprecated. Use the standard
|
|
``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE`` control instead.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)``
|
|
Display delay value for H264 decoder. The decoder is forced to
|
|
return a decoded frame after the set 'display delay' number of
|
|
frames. If this number is low it may result in frames returned out
|
|
of display order, in addition the hardware may still be using the
|
|
returned buffer as a reference picture for subsequent frames.
|
|
|
|
.. note::
|
|
|
|
This control is deprecated. Use the standard
|
|
``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY`` control instead.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)``
|
|
The number of reference pictures used for encoding a P picture.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_PADDING (boolean)``
|
|
Padding enable in the encoder - use a color instead of repeating
|
|
border pixels. Applicable to encoders.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV (integer)``
|
|
Padding color in the encoder. Applicable to encoders. The supplied
|
|
32-bit integer is interpreted as follows (bit 0 = least significant
|
|
bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:7
|
|
- V chrominance information
|
|
* - Bit 8:15
|
|
- U chrominance information
|
|
* - Bit 16:23
|
|
- Y luminance information
|
|
* - Bit 24:31
|
|
- Must be zero.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF (integer)``
|
|
Reaction coefficient for MFC rate control. Applicable to encoders.
|
|
|
|
.. note::
|
|
|
|
#. Valid only when the frame level RC is enabled.
|
|
|
|
#. For tight CBR, this field must be small (ex. 2 ~ 10). For
|
|
VBR, this field must be large (ex. 100 ~ 1000).
|
|
|
|
#. It is not recommended to use the greater number than
|
|
FRAME_RATE * (10^9 / BIT_RATE).
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_DARK (boolean)``
|
|
Adaptive rate control for dark region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_SMOOTH (boolean)``
|
|
Adaptive rate control for smooth region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_STATIC (boolean)``
|
|
Adaptive rate control for static region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_ACTIVITY (boolean)``
|
|
Adaptive rate control for activity region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
.. _v4l2-mpeg-mfc51-video-frame-skip-mode:
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE``
|
|
(enum)
|
|
|
|
.. note::
|
|
|
|
This control is deprecated. Use the standard
|
|
``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE`` control instead.
|
|
|
|
enum v4l2_mpeg_mfc51_video_frame_skip_mode -
|
|
Indicates in what conditions the encoder should skip frames. If
|
|
encoding a frame would cause the encoded stream to be larger then a
|
|
chosen data limit then the frame will be skipped. Possible values
|
|
are:
|
|
|
|
|
|
.. tabularcolumns:: |p{9.4cm}|p{8.1cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_DISABLED``
|
|
- Frame skip mode is disabled.
|
|
* - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT``
|
|
- Frame skip mode enabled and buffer limit is set by the chosen
|
|
level and is defined by the standard.
|
|
* - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT``
|
|
- Frame skip mode enabled and buffer limit is set by the VBV
|
|
(MPEG1/2/4) or CPB (H264) buffer size control.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT (integer)``
|
|
Enable rate-control with fixed target bit. If this setting is
|
|
enabled, then the rate control logic of the encoder will calculate
|
|
the average bitrate for a GOP and keep it below or equal the set
|
|
bitrate target. Otherwise the rate control logic calculates the
|
|
overall average bitrate for the stream and keeps it below or equal
|
|
to the set bitrate. In the first case the average bitrate for the
|
|
whole stream will be smaller then the set bitrate. This is caused
|
|
because the average is calculated for smaller number of frames, on
|
|
the other hand enabling this setting will ensure that the stream
|
|
will meet tight bandwidth constraints. Applicable to encoders.
|
|
|
|
.. _v4l2-mpeg-mfc51-video-force-frame-type:
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_mfc51_video_force_frame_type -
|
|
Force a frame type for the next queued buffer. Applicable to
|
|
encoders. Possible values are:
|
|
|
|
.. tabularcolumns:: |p{9.9cm}|p{7.6cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_DISABLED``
|
|
- Forcing a specific frame type disabled.
|
|
* - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_I_FRAME``
|
|
- Force an I-frame.
|
|
* - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_NOT_CODED``
|
|
- Force a non-coded frame.
|
|
|
|
|
|
CX2341x MPEG Controls
|
|
=====================
|
|
|
|
The following MPEG class controls deal with MPEG encoding settings that
|
|
are specific to the Conexant CX23415 and CX23416 MPEG encoding chips.
|
|
|
|
|
|
.. _cx2341x-control-id:
|
|
|
|
CX2341x Control IDs
|
|
-------------------
|
|
|
|
.. _v4l2-mpeg-cx2341x-video-spatial-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_spatial_filter_mode -
|
|
Sets the Spatial Filter mode (default ``MANUAL``). Possible values
|
|
are:
|
|
|
|
|
|
.. tabularcolumns:: |p{11.5cm}|p{6.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_MANUAL``
|
|
- Choose the filter manually
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_AUTO``
|
|
- Choose the filter automatically
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER (integer (0-15))``
|
|
The setting for the Spatial Filter. 0 = off, 15 = maximum. (Default
|
|
is 0.)
|
|
|
|
.. _luma-spatial-filter-type:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_luma_spatial_filter_type -
|
|
Select the algorithm to use for the Luma Spatial Filter (default
|
|
``1D_HOR``). Possible values:
|
|
|
|
.. tabularcolumns:: |p{13.1cm}|p{4.4cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_OFF``
|
|
- No filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR``
|
|
- One-dimensional horizontal
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_VERT``
|
|
- One-dimensional vertical
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_HV_SEPARABLE``
|
|
- Two-dimensional separable
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_SYM_NON_SEPARABLE``
|
|
- Two-dimensional symmetrical non-separable
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
.. _chroma-spatial-filter-type:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_chroma_spatial_filter_type -
|
|
Select the algorithm for the Chroma Spatial Filter (default
|
|
``1D_HOR``). Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{11.0cm}|p{6.5cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_OFF``
|
|
- No filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR``
|
|
- One-dimensional horizontal
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
.. _v4l2-mpeg-cx2341x-video-temporal-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_temporal_filter_mode -
|
|
Sets the Temporal Filter mode (default ``MANUAL``). Possible values
|
|
are:
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL``
|
|
- Choose the filter manually
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_AUTO``
|
|
- Choose the filter automatically
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER (integer (0-31))``
|
|
The setting for the Temporal Filter. 0 = off, 31 = maximum. (Default
|
|
is 8 for full-scale capturing and 0 for scaled capturing.)
|
|
|
|
.. _v4l2-mpeg-cx2341x-video-median-filter-type:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_median_filter_type -
|
|
Median Filter Type (default ``OFF``). Possible values are:
|
|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{11.0cm}|p{6.5cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF``
|
|
- No filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR``
|
|
- Horizontal filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_VERT``
|
|
- Vertical filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR_VERT``
|
|
- Horizontal and vertical filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_DIAG``
|
|
- Diagonal filter
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_BOTTOM (integer (0-255))``
|
|
Threshold above which the luminance median filter is enabled
|
|
(default 0)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_TOP (integer (0-255))``
|
|
Threshold below which the luminance median filter is enabled
|
|
(default 255)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM (integer (0-255))``
|
|
Threshold above which the chroma median filter is enabled (default
|
|
0)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_TOP (integer (0-255))``
|
|
Threshold below which the chroma median filter is enabled (default
|
|
255)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_STREAM_INSERT_NAV_PACKETS (boolean)``
|
|
The CX2341X MPEG encoder can insert one empty MPEG-2 PES packet into
|
|
the stream between every four video frames. The packet size is 2048
|
|
bytes, including the packet_start_code_prefix and stream_id
|
|
fields. The stream_id is 0xBF (private stream 2). The payload
|
|
consists of 0x00 bytes, to be filled in by the application. 0 = do
|
|
not insert, 1 = insert packets.
|
|
|
|
|
|
VPX Control Reference
|
|
=====================
|
|
|
|
The VPX controls include controls for encoding parameters of VPx video
|
|
codec.
|
|
|
|
|
|
.. _vpx-control-id:
|
|
|
|
VPX Control IDs
|
|
---------------
|
|
|
|
.. _v4l2-vpx-num-partitions:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS``
|
|
(enum)
|
|
|
|
enum v4l2_vp8_num_partitions -
|
|
The number of token partitions to use in VP8 encoder. Possible
|
|
values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_1_PARTITION``
|
|
- 1 coefficient partition
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_2_PARTITIONS``
|
|
- 2 coefficient partitions
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_4_PARTITIONS``
|
|
- 4 coefficient partitions
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_8_PARTITIONS``
|
|
- 8 coefficient partitions
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4 (boolean)``
|
|
Setting this prevents intra 4x4 mode in the intra mode decision.
|
|
|
|
.. _v4l2-vpx-num-ref-frames:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES``
|
|
(enum)
|
|
|
|
enum v4l2_vp8_num_ref_frames -
|
|
The number of reference pictures for encoding P frames. Possible
|
|
values are:
|
|
|
|
.. tabularcolumns:: |p{7.5cm}|p{7.5cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_1_REF_FRAME``
|
|
- Last encoded frame will be searched
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_2_REF_FRAME``
|
|
- Two frames will be searched among the last encoded frame, the
|
|
golden frame and the alternate reference (altref) frame. The
|
|
encoder implementation will decide which two are chosen.
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_3_REF_FRAME``
|
|
- The last encoded frame, the golden frame and the altref frame will
|
|
be searched.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL (integer)``
|
|
Indicates the loop filter level. The adjustment of the loop filter
|
|
level is done via a delta value against a baseline loop filter
|
|
value.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS (integer)``
|
|
This parameter affects the loop filter. Anything above zero weakens
|
|
the deblocking effect on the loop filter.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD (integer)``
|
|
Sets the refresh period for the golden frame. The period is defined
|
|
in number of frames. For a value of 'n', every nth frame starting
|
|
from the first key frame will be taken as a golden frame. For eg.
|
|
for encoding sequence of 0, 1, 2, 3, 4, 5, 6, 7 where the golden
|
|
frame refresh period is set as 4, the frames 0, 4, 8 etc will be
|
|
taken as the golden frames as frame 0 is always a key frame.
|
|
|
|
.. _v4l2-vpx-golden-frame-sel:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL``
|
|
(enum)
|
|
|
|
enum v4l2_vp8_golden_frame_sel -
|
|
Selects the golden frame for encoding. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\scriptsize
|
|
|
|
.. tabularcolumns:: |p{8.6cm}|p{8.9cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_PREV``
|
|
- Use the (n-2)th frame as a golden frame, current frame index being
|
|
'n'.
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_REF_PERIOD``
|
|
- Use the previous specific frame indicated by
|
|
``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD`` as a
|
|
golden frame.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_MIN_QP (integer)``
|
|
Minimum quantization parameter for VP8.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_MAX_QP (integer)``
|
|
Maximum quantization parameter for VP8.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for VP8.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP (integer)``
|
|
Quantization parameter for a P frame for VP8.
|
|
|
|
.. _v4l2-mpeg-video-vp8-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VP8_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_vp8_profile -
|
|
This control allows selecting the profile for VP8 encoder.
|
|
This is also used to enumerate supported profiles by VP8 encoder or decoder.
|
|
Possible values are:
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_0``
|
|
- Profile 0
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_1``
|
|
- Profile 1
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_2``
|
|
- Profile 2
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_3``
|
|
- Profile 3
|
|
|
|
.. _v4l2-mpeg-video-vp9-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VP9_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_vp9_profile -
|
|
This control allows selecting the profile for VP9 encoder.
|
|
This is also used to enumerate supported profiles by VP9 encoder or decoder.
|
|
Possible values are:
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_0``
|
|
- Profile 0
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_1``
|
|
- Profile 1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_2``
|
|
- Profile 2
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_3``
|
|
- Profile 3
|
|
|
|
.. _v4l2-mpeg-video-vp9-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VP9_LEVEL (enum)``
|
|
|
|
enum v4l2_mpeg_video_vp9_level -
|
|
This control allows selecting the level for VP9 encoder.
|
|
This is also used to enumerate supported levels by VP9 encoder or decoder.
|
|
More information can be found at
|
|
`webmproject <https://www.webmproject.org/vp9/levels/>`__. Possible values are:
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_0``
|
|
- Level 1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_1``
|
|
- Level 1.1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_0``
|
|
- Level 2
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_1``
|
|
- Level 2.1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_0``
|
|
- Level 3
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_1``
|
|
- Level 3.1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_0``
|
|
- Level 4
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_1``
|
|
- Level 4.1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_0``
|
|
- Level 5
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_1``
|
|
- Level 5.1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_2``
|
|
- Level 5.2
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_0``
|
|
- Level 6
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_1``
|
|
- Level 6.1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_2``
|
|
- Level 6.2
|
|
|
|
|
|
High Efficiency Video Coding (HEVC/H.265) Control Reference
|
|
===========================================================
|
|
|
|
The HEVC/H.265 controls include controls for encoding parameters of HEVC/H.265
|
|
video codec.
|
|
|
|
|
|
.. _hevc-control-id:
|
|
|
|
HEVC/H.265 Control IDs
|
|
----------------------
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP (integer)``
|
|
Minimum quantization parameter for HEVC.
|
|
Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP (integer)``
|
|
Maximum quantization parameter for HEVC.
|
|
Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for HEVC.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP (integer)``
|
|
Quantization parameter for a P frame for HEVC.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP (integer)``
|
|
Quantization parameter for a B frame for HEVC.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the HEVC I frame to limit I frame
|
|
quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the HEVC I frame to limit I frame
|
|
quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the HEVC P frame to limit P frame
|
|
quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the HEVC P frame to limit P frame
|
|
quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the HEVC B frame to limit B frame
|
|
quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the HEVC B frame to limit B frame
|
|
quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit.
|
|
If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP (boolean)``
|
|
HIERARCHICAL_QP allows the host to specify the quantization parameter
|
|
values for each temporal layer through HIERARCHICAL_QP_LAYER. This is
|
|
valid only if HIERARCHICAL_CODING_LAYER is greater than 1. Setting the
|
|
control value to 1 enables setting of the QP values for the layers.
|
|
|
|
.. _v4l2-hevc-hier-coding-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_hier_coding_type -
|
|
Selects the hierarchical coding type for encoding. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{8.2cm}|p{9.3cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B``
|
|
- Use the B frame for hierarchical coding.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P``
|
|
- Use the P frame for hierarchical coding.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER (integer)``
|
|
Selects the hierarchical coding layer. In normal encoding
|
|
(non-hierarchial coding), it should be zero. Possible values are [0, 6].
|
|
0 indicates HIERARCHICAL CODING LAYER 0, 1 indicates HIERARCHICAL CODING
|
|
LAYER 1 and so on.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 0.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 1.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 2.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 3.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 4.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 5.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 6.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
.. _v4l2-hevc-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_profile -
|
|
Select the desired profile for HEVC encoder.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.5cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN``
|
|
- Main profile.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE``
|
|
- Main still picture profile.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10``
|
|
- Main 10 profile.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
.. _v4l2-hevc-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_level -
|
|
Selects the desired level for HEVC encoder.
|
|
|
|
================================== =========
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_1`` Level 1.0
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_2`` Level 2.0
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1`` Level 2.1
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_3`` Level 3.0
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1`` Level 3.1
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_4`` Level 4.0
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1`` Level 4.1
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_5`` Level 5.0
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1`` Level 5.1
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2`` Level 5.2
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_6`` Level 6.0
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1`` Level 6.1
|
|
``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2`` Level 6.2
|
|
================================== =========
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION (integer)``
|
|
Indicates the number of evenly spaced subintervals, called ticks, within
|
|
one second. This is a 16 bit unsigned integer and has a maximum value up to
|
|
0xffff and a minimum value of 1.
|
|
|
|
.. _v4l2-hevc-tier:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_TIER``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_tier -
|
|
TIER_FLAG specifies tiers information of the HEVC encoded picture. Tier
|
|
were made to deal with applications that differ in terms of maximum bit
|
|
rate. Setting the flag to 0 selects HEVC tier as Main tier and setting
|
|
this flag to 1 indicates High tier. High tier is for applications requiring
|
|
high bit rates.
|
|
|
|
================================== ==========
|
|
``V4L2_MPEG_VIDEO_HEVC_TIER_MAIN`` Main tier.
|
|
``V4L2_MPEG_VIDEO_HEVC_TIER_HIGH`` High tier.
|
|
================================== ==========
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (integer)``
|
|
Selects HEVC maximum coding unit depth.
|
|
|
|
.. _v4l2-hevc-loop-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_loop_filter_mode -
|
|
Loop filter mode for HEVC encoder. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{12.1cm}|p{5.4cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED``
|
|
- Loop filter is disabled.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_ENABLED``
|
|
- Loop filter is enabled.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY``
|
|
- Loop filter is disabled at the slice boundary.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2 (integer)``
|
|
Selects HEVC loop filter beta offset. The valid range is [-6, +6].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2 (integer)``
|
|
Selects HEVC loop filter tc offset. The valid range is [-6, +6].
|
|
|
|
.. _v4l2-hevc-refresh-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_hier_refresh_type -
|
|
Selects refresh type for HEVC encoder.
|
|
Host has to specify the period into
|
|
V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{6.2cm}|p{11.3cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_NONE``
|
|
- Use the B frame for hierarchical coding.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_CRA``
|
|
- Use CRA (Clean Random Access Unit) picture encoding.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_IDR``
|
|
- Use IDR (Instantaneous Decoding Refresh) picture encoding.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (integer)``
|
|
Selects the refresh period for HEVC encoder.
|
|
This specifies the number of I pictures between two CRA/IDR pictures.
|
|
This is valid only if REFRESH_TYPE is not 0.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (boolean)``
|
|
Indicates HEVC lossless encoding. Setting it to 0 disables lossless
|
|
encoding. Setting it to 1 enables lossless encoding.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (boolean)``
|
|
Indicates constant intra prediction for HEVC encoder. Specifies the
|
|
constrained intra prediction in which intra largest coding unit (LCU)
|
|
prediction is performed by using residual data and decoded samples of
|
|
neighboring intra LCU only. Setting the value to 1 enables constant intra
|
|
prediction and setting the value to 0 disables constant intra prediction.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (boolean)``
|
|
Indicates wavefront parallel processing for HEVC encoder. Setting it to 0
|
|
disables the feature and setting it to 1 enables the wavefront parallel
|
|
processing.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB (boolean)``
|
|
Setting the value to 1 enables combination of P and B frame for HEVC
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID (boolean)``
|
|
Indicates temporal identifier for HEVC encoder which is enabled by
|
|
setting the value to 1.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING (boolean)``
|
|
Indicates bi-linear interpolation is conditionally used in the intra
|
|
prediction filtering process in the CVS when set to 1. Indicates bi-linear
|
|
interpolation is not used in the CVS when set to 0.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1 (integer)``
|
|
Indicates maximum number of merge candidate motion vectors.
|
|
Values are from 0 to 4.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION (boolean)``
|
|
Indicates temporal motion vector prediction for HEVC encoder. Setting it to
|
|
1 enables the prediction. Setting it to 0 disables the prediction.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE (boolean)``
|
|
Specifies if HEVC generates a stream with a size of the length field
|
|
instead of start code pattern. The size of the length field is configurable
|
|
through the V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD control. Setting
|
|
the value to 0 disables encoding without startcode pattern. Setting the
|
|
value to 1 will enables encoding without startcode pattern.
|
|
|
|
.. _v4l2-hevc-size-of-length-field:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_size_of_length_field -
|
|
Indicates the size of length field.
|
|
This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{5.5cm}|p{12.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_0``
|
|
- Generate start code pattern (Normal).
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_1``
|
|
- Generate size of length field instead of start code pattern and length is 1.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_2``
|
|
- Generate size of length field instead of start code pattern and length is 2.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_4``
|
|
- Generate size of length field instead of start code pattern and length is 4.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 0 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 1 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 2 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 3 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 4 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 5 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 6 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (integer)``
|
|
Selects number of P reference pictures required for HEVC encoder.
|
|
P-Frame can use 1 or 2 frames for reference.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (integer)``
|
|
Indicates whether to generate SPS and PPS at every IDR. Setting it to 0
|
|
disables generating SPS and PPS at every IDR. Setting it to one enables
|
|
generating SPS and PPS at every IDR.
|