Am 26.03.2021 um 09:55 schrieb Cecil Westerhof via ffmpeg-user:
I want to publish a speech I gave during a Zoom meeting. But cutting
it out does not work.
When I use:
ffmpeg -y -i 2021-03-25ToastmastersClubAvond.mp4 -ss 1190 -to 1631 -acodec
copy -vcodec copy -async 1 speech.mp4
The video starts just a bit to late. But when I use:
ffmpeg -y -i 2021-03-25ToastmastersClubAvond.mp4 -ss 1185 -to 1631 -acodec
copy -vcodec copy -async 1 speech.mp4
which is five seconds earlier. I get the same output.
Am I doing something wrong?
Without re-encoding you can only cut at keyframes.
If you want to cut at exact times, you must remove -acodec copy and
-vcodec copy
Michael
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