I've downloaded the last SVN as suggested.I have solved the ARM cross-compile problems and launch it on ARM to receive the MPEG4 stream. With the same method mentioned in the previous messages I can't open the stream,this is the log,about you what's happened? Playing rtsp://192.168.100.225/stream.sdp. Connecting to server 192.168.100.225[192.168.100.225]: 554... rtsp_session: unsupported RTSP server. Server type is 'unknown'. STREAM_LIVE555, URL: rtsp://192.168.100.225/automaonline.sdp Stream not seekable! file format detected. Initiated "video/MP4V-ES" RTP subsession on port 47058 demux_rtp: Guessed the video frame rate as 25 frames-per-second. (If this is wrong, use the "-fps <frame-rate>" option instead.) VIDEO: [mp4v] 0x0 0bpp 25.000 fps 0.0 kbps ( 0.0 kbyte/s) ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Cannot find codec 'mpeg4' in libavcodec... VDecoder init failed :( Requested video codec family [xvid] (vfm=xvid) not available. Enable it at compilation. Requested video codec family [ubmp4] (vfm=vfw) not available. Enable it at compilation. Cannot find codec matching selected -vo and video format 0x7634706D. Read DOCS/HTML/en/codecs.html! ========================================================================== Can't restore text mode: Invalid argument anyone can explain to me? THANKS