[FFmpeg-user] Split Video into RGB and Alpha

[Hanna Frangiyyeh]

Thank you.
Hanna


On Tue, Jan 4, 2022 at 1:06 PM Michael Koch <astroelectronic at t-online.de>
wrote:

> Am 04.01.2022 um 18:04 schrieb Hanna Frangiyyeh:
> > Hi Michael;
> > Sorry I'm a novice to ffmpeg, is there a way to do it in one command
> pass.
> > Also, do you have command that you can share?
>
> Here is an example:
>
> rem  Make a short test video with alpha channel
>
> ffmpeg -f lavfi -i testsrc2=s=1920x1080:d=3 -lavfi
> format=rgba,geq=a='255*gt(X,Y)':r='r(X,Y)':g='g(X,Y)':b='b(X,Y)' -c:v
> prores_ks -y test.mov
>
>
> rem  Extract the RGB channels
>
> ffmpeg -i test.mov -pix_fmt rgb48le -y rgb.mov
>
>
> rem  Extract the alpha channel
>
> ffmpeg -i test.mov -lavfi extractplanes=a -y alpha.mov
>
>
> It's possible to do all in one command, but it's easier if you make it
> in two steps.
>
> Michael
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