Hi, MPlayer doesn't play RTSP protocol. Sound work fine, but video doesn't. I have error: [rv20 @ 00B2DC90]error, qscale:0 [rv20 @ 00B2DC90]HEADER ERROR [rv20 @ 00B2DC90]error, qscale:0 [rv20 @ 00B2DC90]HEADER ERROR [rv20 @ 00B2DC90]concealing 300 DC, 300 AC, 300 MV errors [rv20 @ 00B2DC90]illegal ac vlc code at 0x0 [rv20 @ 00B2DC90]ERROR at MB 0 0 [rv20 @ 00B2DC90]error, qscale:0 ..... Url: rtsp://169.229.131.16:554/bibs/s2006/group1/cs61b/20060118.rm?start=5:08&end=53:35&cloakport=8080,554,7070 I attached mplayer output with different msglevels. Thank you very much for help