git.videolan.org Git - ffmpeg.git/rss log

Les articles publiés sur le site

• avformat/matroskaenc : Use native id V_FFV1 instead of V_MS/VFW/FOURCC

  25 mai, par Andreas Rheinhardt

  avformat/matroskaenc: Use native id V_FFV1 instead of V_MS/VFW/FOURCC
  
  Up until now, our muxer wrote FFV1 in video-for-windows
  compatibility mode out of concern for old demuxers that
  only support that (whereas the demuxer accepts V_FFV1).
  This commit switches to using native mode, because
  a) V_FFV1 is around long enough so that old demuxers
  should not be an issue (support in FFmpeg has been added
  in commit 9ae762da7e256aa4d3b645c614fcd1959e1cbb8d
  in March 2017/FFmpeg 3.3),
  b) using native mode uses fewer bytes for the CodecPrivate,
  c) the VfW extradata is zero-padded to an even length
  if necessary, but our demuxer forgot to undo the padding
  until very recently (92e310eb82e04713e55d248b65c22f0eb95afada),
  so that there are many versions of our demuxer around that
  are buggy wrt VFW, but not V_FFV1.
  This affects the FFV1 extradata checksums, specifically
  the (experimental) version 4 files with error check version 2*
  as created by
  ffmpeg -i ../fate-suite/mpeg2/sony-ct3.bs -c:v ffv1 \
  -slices 16 -frames 1 -level 4 -strict experimental ffv1.mkv
  VFW files like the above created by this muxer before this patch
  would not work with an old demuxer.
  
  *: Without error check version 2, the CRC for the whole extradata
  is zero, which is not changed by appending a zero byte.
  
  Reviewed-by: compn <ff@hawaiiantel.net>
  Reviewed-by: Dave Rice <dave@dericed.com>
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/matroskaenc.c
  • [DH] tests/ref/fate/matroska-mastering-display-metadata

• avformat/matroska : Support JPEG2000 for demuxing

  25 mai, par Andreas Rheinhardt

  avformat/matroska: Support JPEG2000 for demuxing
  
  Legal since commit 1cd0a9be4b2d1e7c60184ec68404e00e46e3123e
  (Jan 4) in the Cellar Matroska specification git repo.
  We still hold out on muxing it due to compatibility with
  old demuxers.
  
  Reviewed-by: compn <ff@hawaiiantel.net>
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/matroska.c
  • [DH] libavformat/matroskaenc.c

• libavformat/oggdec.h : Change paket function documentation to return 1 on header packe...

  24 mai, par Romain Beauxis

  libavformat/oggdec.h: Change paket function documentation to return 1 on header packets only.
  
  Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/oggdec.h

• ogg/vorbis : implement header packet skip in chained ogg bitstreams.

  24 mai, par Romain Beauxis

  ogg/vorbis: implement header packet skip in chained ogg bitstreams.
  
  Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/vorbis_parser.h
  • [DH] libavcodec/vorbisdec.c
  • [DH] libavformat/oggparsevorbis.c
  • [DH] tests/ref/fate/ogg-vorbis-chained-meta.txt

• ogg/vorbis : factor out header processing logic.

  24 mai, par Romain Beauxis

  ogg/vorbis: factor out header processing logic.
  
  Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/oggparsevorbis.c