Side-by-Side RTSP Stream Capture

Assuming you have two RTSP MPEG-4 streams and wish to generate a side-by-side mosaic. You can do this by using the video filter overlay method; ffmpeg -y -q:v 0 -i rtsp://192.168.128.85/video -q:v 0 -an -vf "[in] pad=2*iw:ih [left]; movie='rtsp\://192.168.128.86/video' [right]; [left][right] overlay=main_w/2:0 [out]" /tmp/sidebyside.avi