I have a bunch of .avi files of recorded TV shows from my TV tuner card on my PC that I would like to convert to H.264. I am using ffmpegx to try to acheive this, but I having some problems. If I use h.264 mencoder, I get a file that won't open in Quicktime or VLC. If I use the h.264 x264 I get audio to work, but the video plays at like 20x speed. I converted to a MPEG4 .mov format and it worked properly, so I wouldn't think it is my avi file. Any thoughts? I should warn, that I don't know much about compression things. Well, I have a little EE training and know a little about frequency domain processing, but nothing actually practical! Thanks in advance!