Yes, the audio and video have different start times:
ffprobe -i test.mp4 -show_entries stream
video:
start_pts=116370
start_time=1.293000
audio:
start_pts=0
start_time=0.000000
On Sat, Mar 7, 2020 at 6:21 PM Carl Eugen Hoyos <ceffm...@gmail.com> wrote:
> Am Sa., 7. März 2020 um 11:16 Uhr schrieb Du Dengke <pingandd...@gmail.com
> >:
>
> > When I run the following command
> > ffmpeg -i test.mp4 -vf scale=640x360 test2.mp4
>
> Complete, uncut console output missing.
>
> > 32 frames was added after the transform, and I saw some static picture
> > within the first second.
> > My question:
> > Why the 32 frames was added, does this video trigger some mechanism?
> > And why the static picture was added at the first?
>
> See above, most likely because audio and video have different
> start times which FFmpeg's muxer does not support.
>
> Carl Eugen
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