[FFmpeg-user] toggle between two streams

Michael Koch astroelectronic at t-online.de
Fri Sep 3 16:07:01 EEST 2021

Am 03.09.2021 um 14:21 schrieb Michael Koch:
> I have two video streams and want to toggle between them in 1 second 
> intervals. I did try this command:
> ffmpeg -i in1.mp4 -i in2.mp4 -lavfi streamselect=map='mod(t,2)' -t 30 
> out.mp4
> This doesn't work because streamselect doesn't accept expressions.
> Who has an idea for a workaround?

Found a workaround myself:



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