[FFmpeg-user] toggle between two streams

[Paul B Mahol]

On Fri, Sep 3, 2021 at 3:07 PM Michael Koch <astroelectronic at t-online.de>
wrote:

> 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:
>
> blend=all_expr='if(lt(mod(T,2),1),A,B)'
>
>
Slow, doesnt it supports commands?


> Michael
>
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