I'm trying to transcode realmedia .rmvb to x264 mp4 for playing over upnp on a ps3. mencoder input_movie.rmvb -oac mp3lame -ovc x264 \ -of lavf -o output_file.mp4 But then I get this message: ** MUXER_LAVF ***************************************************************** REMEMBER: MEncoder's libavformat muxing is presently broken and can generate INCORRECT files in the presence of B-frames. Moreover, due to bugs MPlayer will play these INCORRECT files as if nothing were wrong! ******************************************************************************* OK, exit. So if this doesn't work, is there anything that does? sean