Save a video in "RGB + Alpha"

[Keryas]

Hi !
I'm using OBS Studio, usually to stream, but this time I just want to capture a video with a green background, and save it with the transparency (RGB + Alpha) ... but I don't find any option for this.
Is it possible ? Do you know where I can find it ?
Sorry for my english, I'm not native, and thanks for the help ! ;)

 

[FerretBomb]

OBS does not support output of alpha-channel video.

 

[Keryas]

Ok ... at least : that's clear ! Thanks for your answer ! :)