[FFmpeg-user] Dropping 1 frame every n seconds

Paul B Mahol onemda at gmail.com
Sun May 31 14:38:02 CEST 2015

Dana 31. 5. 2015. 11:46 osoba "Steve" <steve at aatw.com> napisala je:
> I would like to try and test changing the tempo of the audio in a video
without losing sync and without having to blend or merge frames.
> At 25fps, dropping 1 frame would allow the the audio to be pitched/time
stretched by 4% and dropping 1 frame every 2 seconds would allow for 2%
> I understand how to modify the audio with atempo but am not sure of the
best method to drop one frame every second or every other second - is it
possible with a standard filter command?

See select and framestep filter documentation.

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