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43 of the available MPEG stream types. This control is specific to
145 MPEG Audio encoding. This control is specific to multiplexed MPEG
393 in stereo. Layer III is not (yet) supported. Possible values are:
457 Mutes the audio when capturing. This is not done by muting audio
508 MPEG Video encoding method. This control is specific to multiplexed
587 the average video bitrate. It is ignored if the video bitrate mode
588 is set to constant bitrate.
591 Constant quality level control. This control is applicable when
592 ``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` value is
593 ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ``. Valid range is 1 to 100
619 - Frame skip mode is disabled.
621 - Frame skip mode enabled and buffer limit is set by the chosen
622 level and is defined by the standard.
624 - Frame skip mode enabled and buffer limit is set by the
637 "Mutes" the video to a fixed color when capturing. This is useful
642 Sets the "mute" color of the video. The supplied 32-bit integer is
667 currently displayed frame. This is the same PTS as is used in
674 is currently displayed (decoded). This value is reset to 0 whenever
675 the decoder is started.
680 where the reference frame is missing. The decoder should fill the
682 decoding. The control is using 16 bits per channel.
716 If the display delay is enabled then the decoder is forced to return
724 Display delay value for decoder. The decoder is forced to
726 frames. If this number is low it may result in frames returned out
745 VUI sample aspect ratio indicator for H.264 encoding. The value is
1083 ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
1089 ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
1112 - Loop filter is enabled.
1114 - Loop filter is disabled.
1116 - Loop filter is disabled at the slice boundary.
1127 offset FilterOffsetA is twice this value.
1134 FilterOffsetB is twice this value.
1174 Cyclic intra macroblock refresh. This is the number of continuous
1176 macroblocks is refreshed until the cycle completes and starts from
1180 is set to non zero value.
1187 the whole frame is specified by V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD.
1188 Note that if this control is not present, then it is undefined what
1189 refresh type is used and it is up to the driver to decide.
1199 - The whole frame is completely refreshed randomly
1213 zero means no period is specified.
1219 Frame level rate control enable. If this control is disabled then
1220 the quantization parameter for each frame type is constant and set
1222 ``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP``). If frame rate control is
1223 enabled then quantization parameter is adjusted to meet the chosen
1275 V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
1281 V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
1287 V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
1293 V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
1299 V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
1305 V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
1329 The Video Buffer Verifier size in kilobytes, it is used as a
1330 limitation of frame skip. The VBV is defined in the standard as a
1333 decoder that is conceptually connected to the output of the encoder.
1334 Its purpose is to provide a constraint on the variability of the
1348 reference picture. This V4L2 control macro is used to set horizontal
1356 picture. This V4L2 control macro is used to set vertical search
1363 encoders. This is a general, codec-agnostic keyframe control.
1368 The Coded Picture Buffer size in kilobytes, it is used as a
1369 limitation of frame skip. The CPB is defined in the H264 standard as
1375 GOP this is the period between two I-frames. The period between IDR
1376 (Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE
1378 Refresh is an I-frame after which no prior frames are referenced.
1389 Determines whether the header is returned as the first buffer or is
1404 - The stream header is returned separately in the first buffer.
1406 - The stream header is returned together with the first encoded
1420 Enabled the deblocking post processing filter for MPEG4 decoder.
1467 - L is on the left, R on the right.
1469 - L is on top, R on bottom.
1480 Enables flexible macroblock ordering in the encoded bitstream. It is
1566 The supplied 32-bit integer is interpreted as follows (bit 0 = least
1613 encoder. The supplied 32-bit integer is interpreted as follows (bit
1675 If the display delay is enabled then the decoder is forced to return
1684 This control is deprecated. Use the standard
1688 Display delay value for H264 decoder. The decoder is forced to
1690 frames. If this number is low it may result in frames returned out
1696 This control is deprecated. Use the standard
1709 32-bit integer is interpreted as follows (bit 0 = least significant
1734 #. Valid only when the frame level RC is enabled.
1739 #. It is not recommended to use the greater number than
1744 macroblock level RC is enabled
1750 macroblock level RC is enabled
1756 macroblock level RC is enabled
1762 macroblock level RC is enabled
1773 This control is deprecated. Use the standard
1794 - Frame skip mode is disabled.
1796 - Frame skip mode enabled and buffer limit is set by the chosen
1797 level and is defined by the standard.
1799 - Frame skip mode enabled and buffer limit is set by the VBV
1807 Enable rate-control with fixed target bit. If this setting is
1813 whole stream will be smaller then the set bitrate. This is caused
1814 because the average is calculated for smaller number of frames, on
1878 is 0.)
1970 is 8 for full-scale capturing and 0 for scaled capturing.)
2007 Threshold above which the luminance median filter is enabled
2011 Threshold below which the luminance median filter is enabled
2015 Threshold above which the chroma median filter is enabled (default
2019 Threshold below which the chroma median filter is enabled (default
2024 the stream between every four video frames. The packet size is 2048
2026 fields. The stream_id is 0xBF (private stream 2). The payload
2109 level is done via a delta value against a baseline loop filter
2117 Sets the refresh period for the golden frame. The period is defined
2121 frame refresh period is set as 4, the frames 0, 4, 8 etc will be
2122 taken as the golden frames as frame 0 is always a key frame.
2174 This is also used to enumerate supported profiles by VP8 encoder or decoder.
2197 This is also used to enumerate supported profiles by VP9 encoder or decoder.
2219 This is also used to enumerate supported levels by VP9 encoder or decoder.
2295 If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter
2301 If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter
2307 If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter
2313 If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter
2319 If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter
2325 If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter
2330 values for each temporal layer through HIERARCHICAL_QP_LAYER. This is
2331 valid only if HIERARCHICAL_CODING_LAYER is greater than 1. Setting the
2459 one second. This is a 16 bit unsigned integer and has a maximum value up to
2471 this flag to 1 indicates High tier. High tier is for applications requiring
2502 - Loop filter is disabled.
2504 - Loop filter is enabled.
2506 - Loop filter is disabled at the slice boundary.
2514 Selects HEVC loop filter beta offset. The valid range is [-6, +6].
2517 Selects HEVC loop filter tc offset. The valid range is [-6, +6].
2554 This is valid only if REFRESH_TYPE is not 0.
2563 prediction is performed by using residual data and decoded samples of
2577 Indicates temporal identifier for HEVC encoder which is enabled by
2581 Indicates bi-linear interpolation is conditionally used in the intra
2583 interpolation is not used in the CVS when set to 0.
2586 Indicates maximum number of merge candidate motion vectors.
2595 instead of start code pattern. The size of the length field is configurable
2607 This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled.
2622 - Generate size of length field instead of start code pattern and length is 1.
2624 - Generate size of length field instead of start code pattern and length is 2.
2626 - Generate size of length field instead of start code pattern and length is 4.