cat file01.mpg file02.mpg file03.mpg > alltogether.mpgOther notes:mpegdemux -d -s 0xe0 source.mpg dst.m1vmpegdemux -d -s 0xc0-0xdf -b audio_##.mpa source.mpgmplex -f 8 -o result.mpg dst.m1v audio_c0.mpaAlso can use Project-X to demux