[FFmpeg-user] how to implement "on screen display" with the help of ffmpeg.

[Roger Pack]

> I have two  video stream 'x' and 'y' and I want to combine every picture of video 'x' and video 'y' in to ........something like ................half picture of 'x' stream and half picture of 'y' stream as a single picture.

Overlay filter possibly? (may need to use pad to make it wider, too)
http://ffmpeg.org/ffmpeg.html#overlay-1