#10529: Converting variable frame rate to constant frame rate results in
de-synced
video
-------------------------------------+-------------------------------------
Reporter: norbert515 | Type: defect
Status: new | Priority: important
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
Taking a variable frame rate video (such as one recorded from the iOS
simulator) and re-encoding it to be fixed framerate results in a video
that is not synced to the original. Most noticeably, the animation of
opening apps is cut (doesn't happen all of the time)
How to reproduce:
1. Record iOS simulator using
{{{
% xcrun simctl io booted recordVideo raw.mov
}}}
2. Run
{{{
% ffmpeg -i raw.mov -filter:v fps=60 -fps_mode:v cfr -vsync 1 -copytb 0
ha.mp4
}}}
I've tried all permutations of this command; every one produces the same
defect.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10529>
FFmpeg <https://ffmpeg.org>
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