Batch extracting alpha channel

[Jean-Pierre DRUFFIN]

Hi everybody
Until now, I use this script to extract an alpha channel which works fine.
"ffmpeg -i inpu.mov -vf alphaextract,format=yuv420p out2alpha.mp4"
I'd like to use it as batch on multiple files in a folder. How can I modify it ?
Thank you
Jean-Pierre

[Abel]

Hi, you could just add your input file to the list, then use those parameters:

-vf alphaextract,format=yuv420p

then use the rename setting and add "_alpha" as output suffix.