Chroma key (green screen) live for a webcam?

Question

Is there a way to apply chroma key live to a stream that's used in video conferencing. Webcam works fine though v4l (Cheese, Ekiga).

This but in Linux.

Solution

I use OBS with obs-v4l2sink, and v4l2loopback. I had to build all that (including OBS) from source to get it working in Fedora, but it works.

Comments

[Владислав Щербин]

The ffmpeg-specific solution might be adaptable for this purpose, though you might need to pipe that further on to v4l2loopback to get the composited image showing up as a webcam.