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• libavformat/dashdec : Support negative value of the @r attrbute of S in SegmentTimelin...

  13 août 2018, par sanil

  libavformat/dashdec : Support negative value of the @r attrbute of S in SegmentTimeline element.
  The following patch supports parsing negative value of the @r attribute of S in SegmentTimeline element.
  Example streams :
  
  1. http://dash.edgesuite.net/dash264/TestCases/1c/qualcomm/1/MultiRate.mpd
  
  2. http://dash.edgesuite.net/dash264/TestCases/1c/qualcomm/2/MultiRate.mpd
  

  • [DH] libavformat/dashdec.c

• avformat/movenc : implicitly enable negative CTS offsets for ismv

  26 juillet 2018, par Jan Ekström

  avformat/movenc : implicitly enable negative CTS offsets for ismv
  ISMV lacks any sort of edit list support, as well as tfxd is
  
  effectively the PTS of the fragment for most intents and purposes.
  Thus, if b-frames are requested without negative CTS offsets you
  
  end up with N frames' worth of delay (tfxd PTS plus the CTS offset
  
  of the first sample). Negative CTS offsets enable the first sample
  
  to have CTS=DTS, and thus a/v desync due to b-frame reorder delay
  
  is avoided.
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/movenc.c
  • [DH] tests/ref/fate/movenc
  • [DH] tests/ref/lavf/ismv

• avformat/utils : Never store negative values in last_IP_duration

  12 octobre 2018, par Michael Niedermayer

  avformat/utils : Never store negative values in last_IP_duration
  Fixes : integer overflow compute_pkt_fields()
  
  Fixes : compute_pkt_usan
  Reported-by : Thomas Guilbert <tguilbert@chromium.org>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/utils.c