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• avcodec/movtextdec : Redo TextSampleModifierBox size checks

  8 décembre 2021, par Andreas Rheinhardt

  avcodec/movtextdec : Redo TextSampleModifierBox size checks
  The current checks just check whether the boxes fit into the remaining
  
  size of the packet instead of whether they actually fit into the box
  
  size. This has been changed ; part of this change is to pass the size of
  
  the box (minus the box header) as parameter instead of a pointer to
  
  the AVPacket by which the box parsing function is supposed to
  
  recalculate whether enough data is available.
  Reviewed-by : Philip Langdale <philipl@overt.org>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/movtextdec.c

• avformat/matroskaenc : Redo handling of FlagDefault

  18 janvier 2020, par Andreas Rheinhardt

  avformat/matroskaenc : Redo handling of FlagDefault
  Up until now, the Matroska muxer would mark a track as default if it had
  
  the disposition AV_DISPOSITION_DEFAULT or if there was no track with
  
  AV_DISPOSITION_DEFAULT set ; in the latter case even more than one track
  
  of a kind (audio, video, subtitles) was marked as default which is not
  
  sensible.
  This commit changes the logic used to mark tracks as default. There are
  
  now three modes for this :
  
  a) In the "infer" mode the first track of every type (audio, video,
  
  subtitles) with default disposition set will be marked as default ; if
  
  there is no such track (for a given type), then the first track of this
  
  type (if existing) will be marked as default. This behaviour is inspired
  
  by mkvmerge. It ensures that the default flags will be set in a sensible
  
  way even if the input comes from containers that lack the concept of
  
  default flags. This mode is the default mode.
  
  b) The "infer_no_subs" mode is similar to the "infer" mode ; the
  
  difference is that if no subtitle track with default disposition exists,
  
  no subtitle track will be marked as default at all.
  
  c) The "passthrough" mode : Here the track will be marked as default if
  
  and only the corresponding input stream had disposition default.
  This fixes ticket #8173 (the passthrough mode is ideal for this) as
  
  well as ticket #8416 (the "infer_no_subs" mode leads to the desired
  
  output).
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/matroskaenc.c
  • [DH] tests/ref/fate/matroska-flac-extradata-update

• avformat/av1dec : Redo flushing of bsf

  14 novembre 2019, par Andreas Rheinhardt

  avformat/av1dec : Redo flushing of bsf
  The current approach has two different calls to av_bsf_send_packet() :
  
  A normal one, sending a packet ; and an extraordinary one just for
  
  flushing. These can be unified into one by making use of the newly
  
  documented fact that av_bsf_send_packet() allows to signal flushing via
  
  empty packets (i.e. packets without data and side-data).
  This also fixes CID 1455685 which resulted from the fact that the call
  
  for flushing was not checked given that it couldn't fail.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavformat/av1dec.c