HI, Below is the message that I got from the console when playing mkv. Does it mean the hardware is not enough for playing mkv? If not, how can I tune to sync audio with video? Thanks ---------------- MPlayer SVN-r28461-4.3.2 (C) 2000-2009 MPlayer Team CPU: Intel(R) Celeron(R) CPU 2.40GHz (Family: 15, Model: 3, Stepping: 3) mplayer: could not connect to socket mplayer: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. [mkv] Track ID 1: video (V_MPEG4/ISO/AVC), -vid 0 [mkv] Track ID 2: audio (A_AC3), -aid 0, -alang und [mkv] Will play video track 1. Matroska file format detected. VIDEO: [avc1] 1280x536 24bpp 23.976 fps 0.0 kbps ( 0.0 kbyte/s) ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264) ========================================================================== ========================================================================== Opening audio decoder: [liba52] AC3 decoding with liba52 Using SSE optimized IMDCT transform Using MMX optimized resampler AUDIO: 48000 Hz, 2 ch, s16le, 640.0 kbit/41.67% (ratio: 80000->192000) Selected audio codec: [a52] afm: liba52 (AC3-liba52) ========================================================================== E: context.c: waitpid(): No child processes AO: [pulse] Init failed: Internal error Failed to initialize audio driver 'pulse' AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample) Starting playback... VDec: vo config request - 1280 x 536 (preferred colorspace: Planar YV12) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 2.39:1 - prescaling to correct movie aspect. VO: [xv] 1280x536 => 1280x536 Planar YV12 A: 14.2 V: 13.3 A-V: 0.935 ct: 0.001 0/ 0 71% 9% 3.7% 50 0 ************************************************ **** Your system is too SLOW to play this! **** ************************************************ Possible reasons, problems, workarounds: - Most common: broken/buggy _audio_ driver - Try -ao sdl or use the OSS emulation of ALSA. - Experiment with different values for -autosync, 30 is a good start. - Slow video output - Try a different -vo driver (-vo help for a list) or try -framedrop! - Slow CPU - Don't try to play a big DVD/DivX on a slow CPU! Try some of the lavdopts, e.g. -vfm ffmpeg -lavdopts lowres=1:fast:skiploopfilter=all. - Broken file - Try various combinations of -nobps -ni -forceidx -mc 0. - Slow media (NFS/SMB mounts, DVD, VCD etc) - Try -cache 8192. - Are you using -cache to play a non-interleaved AVI file? - Try -nocache. Read DOCS/HTML/en/video.html for tuning/speedup tips. If none of this helps you, read DOCS/HTML/en/bugreports.html. A: 126.5 V: 152.2 A-V:-25.725 ct: -3.896 0/ 0 98% 8% 1.9% 324 0 Exiting... (Quit)