Hello, When using -vf expand to match up the resolutions of multiple input files for encoding together, I ran into a bug: the last frame of the first input file "sticks" in the black bars of the second input file. It's very easy to reproduce; no need to even download any input files -- just use your friendly neighborhood random device. ;) mencoder -vf expand=240:240 -demuxer rawvideo -ovc lavc -o bars.avi \ /dev/urandom -rawvideo w=240:h=120:fps=24 -frames 48 \ /dev/urandom -rawvideo w=120:h=240:fps=24 -frames 48 mplayer bars.avi I had a look around, but I can't see what's causing this. Thanks, Corey