Am 05.01.2024 um 10:26 schrieb Cecil Westerhof via ffmpeg-user:
Ferdi Scholten <fe...@sttc-nlp.nl> writes:
I want to play a video in a video from a certain point. I understood I
could do something like:
ffmpeg \
-i input1.mp4 \
-i input2.mp4 \
-filter_complex "
[0:v][1:v] overlay=25:25:
enable='between(t,8,20)'
" \
-pix_fmt yuv420p \
-c:a copy \
output.mp4
But this starts input2.mp4 from the start of input2.mp4 on the 8
second, for twelve seconds.
Is it possible to let input2.mp4 not start from second 0, but from
second 17?
Try putting -ss 17 between the two inputs.
I was thinking about that. But that means that if I want to use
input2.mp4 several times, I should use input2.mp4 several times with
the correct -ss. Not really a problem, but I had hoped for a more
efficient way.
You can cut off the beginning of the second stream with the "trim"
filter, but then you must also use the "atrim" filter for audio. "-ss"
is easier, but can only make a cut at a keyframe, if I remember right.
Michael
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