[FFmpeg-trac] #7895(avformat:new): Incorrect video framerate due to no timestamp interpolation for H.264/HEVC

FFmpeg trac at avcodec.org
Sun May 12 17:01:27 EEST 2019


#7895: Incorrect video framerate due to no timestamp interpolation for H.264/HEVC
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             Reporter:  taliho      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Changes (by taliho):

 * version:  unspecified => git-master


Comment:

 I've tested on git master and observed the same.

 The issue is that the call to av_read_frame returns many NAL packets with
 unknown timestamps on this input. I assume that different muxers (if the
 stream is going to be re-muxed) will handle this differently.
 But in the above case ffplay does not handle missing timestamps.

 I've sent in a patch that fixes the problem for this dataset:
 http://ffmpeg.org/pipermail/ffmpeg-devel/2019-May/243877.html

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Ticket URL: <https://trac.ffmpeg.org/ticket/7895#comment:2>
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