Hello, I am playing videos using Mplayer on framebuffer. Linux # mplayer -ao help MPlayer 1.0pre7-3.2 (C) 2000-2005 MPlayer Team CPU: SGI MIPS Available audio output drivers: mpegpes Mpeg-PES audio output oss OSS/ioctl audio output null Null audio output pcm RAW PCM/WAVE file writer audio output Now when I am trying to play my video with following commands Linux # mplayer -vo fbdev -ao mpegpes demo_video.mpeg It shows : Could not open/initialize audio device -> no sound. Audio: no sound Starting playback... ----------------------------------------------------------------- Linux # mplayer -vo fbdev -ao oss demo_video.mpeg It shows: [AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or directory Could not open/initialize audio device -> no sound. Audio: no sound Starting playback... ----------------------------------------------------------------- Linux # mplayer -vo fbdev -ao pcm demo_video.mpeg It plays video with no error message but video is very very slow and no sound. But there is no error message. What should I do to rectify this problem?