[FFmpeg-trac] #6905(undetermined:new): When copying video from .avi to .mp4, frames have incorrect pts values

FFmpeg trac at avcodec.org
Mon Dec 11 00:50:03 EET 2017

#6905: When copying video from .avi to .mp4, frames have incorrect pts values
             Reporter:  Misaki       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0

Comment (by Misaki):

 What do you mean by working file? Many programs play it back just fine.
 ffplay does it normally the first time; if you seek back to the start,
 frame 0 does display for an extra 2~3 seconds. totem plays it completely
 normally. vlc has a short delay, plays it normally, then starts dropping
 frames because of "more than 5 seconds of late video".

 ffmpeg doesn't give any warnings or errors for that command.

 Using MP4Box, part of the 'gpac' package, I was able to get a non-bugged
 mp4 that doesn't stutter in Chrome OS. That program doesn't seem to accept
 the h.264 (avc1) codec, but it's still an interim solution for someone
 wishing to convert old avis (using mpeg4 codec) to mp4s that won't stutter
 in Chrome.

Ticket URL: <https://trac.ffmpeg.org/ticket/6905#comment:3>
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