On Thu, Aug 24, 2006 at 04:58:47PM -0400, Jim Driscoll wrote: > Try -of lavf -lavfopts > format=mp4:i_certify_that_my_video_stream_does_not_use_b_frames > > Instead of rawvideo. Only if you disable B frames. AFAIK they're enabled by default, and h264 without B frames largely defeats the purpose of h264. Rich