[FFmpeg-user] Rough Transitions when joining MPEG clips

Hi All, When I play back mpeg clips joined with cat command there are freeze frames when playing back at clip transitions. First thing I do is cat mpeg clips to a file? cat c1.mpg c2.mpg c3.mpg > movie.mpg and use ffmepg to remux the new mpeg file ffmpeg -i movie.mpg -acodec copy -vcodec copy -y out.mpg Is there any thing we can do to remove the rough transitions at clip boundaries and allow for a smooth play back. Thanks Radha