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• avformat/matroska : add support for VVC streams

  11 janvier, par James Almer

  avformat/matroska: add support for VVC streams
  
  As defined in https://github.com/ietf-wg-cellar/matroska-specification/blob/master/codec_specs.md#v_mpegiisovvc
  
  Signed-off-by: James Almer <jamrial@gmail.com>
  

  • [DH] Changelog
  • [DH] libavformat/matroska.c
  • [DH] libavformat/matroskaenc.c
  • [DH] libavformat/version.h
  • [DH] tests/fate-run.sh
  • [DH] tests/fate/lavf-container.mak
  • [DH] tests/ref/lavf-fate/vvc.mkv

• lavc/vvc : Check slice structure

  10 janvier, par Frank Plowman

  lavc/vvc: Check slice structure
  
  The criteria for slice structure validity is similar to that of
  subpicture structure validity that we saw not too long ago [1].
  The relationship between tiles and slices must satisfy the following
  properties:
  
  * Exhaustivity.  All tiles in a picture must belong to a slice.  The
    tiles cover the picture, so this implies the slices must cover the
    picture.
  * Mutual exclusivity.  No tile may belong to more than one slice, i.e.
    slices may not overlap.
  
  In most cases these properties are guaranteed by the syntax.  There is
  one noticable exception however: when pps_tile_idx_delta_present_flag is
  equal to one, each slice is associated with a syntax element
  pps_tile_idx_delta_val[i] which "specifies the difference between the
  tile index of the tile containing the first CTU in the ( i + 1 )-th
  rectangular slice and the tile index of the tile containing the first
  CTU in the i-th rectangular slice" [2].  When these syntax elements are
  present, the i-th slice can begin anywhere and the usual guarantees
  provided by the syntax are lost.
  
  The patch detects slice structures which violate either of the two
  properties above, and are therefore invalid, while building the
  slice map.  Should the slice map be determined to be invalid, an
  AVERROR_INVALIDDATA is returned.  This prevents issues including
  segmentation faults when trying to decode,  invalid bitstreams.
  
  [1]: https://ffmpeg.org//pipermail/ffmpeg-devel/2024-October/334470.html
  [2]: H.266 (V3) Section 7.4.3.5, Picture parameter set RBSP semantics
  
  Signed-off-by: Frank Plowman <post@frankplowman.com>
  

  • [DH] libavcodec/vvc/ps.c

• avformat/flvdec : add support for legacy HEVC files

  10 janvier, par Timo Rothenpieler

  avformat/flvdec: add support for legacy HEVC files
  

  • [DH] libavformat/flv.h
  • [DH] libavformat/flvdec.c
  • [DH] libavformat/version.h

• avutil/frame.h : improve documentation for AV_FRAME_FLAG_LOSSLESS

  10 janvier, par Leo Izen

  avutil/frame.h: improve documentation for AV_FRAME_FLAG_LOSSLESS
  
  It should be more clear what this flag is indicating with a more
  verbose comment documenting it.
  
  Signed-off-by: Leo Izen <leo.izen@gmail.com>
  Reviewed-by: Marton Balint <cus@passwd.hu>
  Reviewed-by: Alexander Strasser <eclipse7@gmx.net>
  Reviewed-by: Marth64 <marth64@proxyid.net>
  

  • [DH] libavutil/frame.h

• avcodec/mediacodecenc : Support config qp range

  10 janvier, par Zhao Zhili

  avcodec/mediacodecenc: Support config qp range
  
  Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
  

  • [DH] libavcodec/mediacodecenc.c
  • [DH] libavcodec/version.h