Hi, I'm getting no video (-fs gives black borders with the background showing where video should be) with mplayer and with matroska- containered x264 files I am using -vo xv and that works fine with other formats (avi/wmv/flv/ mpg/others). but with mkv files I get the errors below, if I switch to -vo x11 the video does play, but with the associated huge performance issues. Any ideas at all would be hugely appreciated! Mplayer is: MPlayer dev-SVN-r27673-4.1.2 (C) 2000-2008 MPlayer Team [mkv] Track ID 1: audio (A_AC3), -aid 0, -alang und [mkv] Track ID 2: video (V_MPEG4/ISO/AVC), -vid 0 [mkv] Will play video track 2. Matroska file format detected. VIDEO: [avc1] 1280x720 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 3DNowEx optimized IMDCT transform Using MMX optimized resampler AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000) Selected audio codec: [a52] afm: liba52 (AC3-liba52) = = ======================================================================== AO: [oss] 48000Hz 2ch s16le (2 bytes per sample) Starting playback... VDec: vo config request - 1280 x 720 (preferred colorspace: Planar YV12) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 1.78:1 - prescaling to correct movie aspect. VO: [xv] 1280x720 => 1280x720 Planar YV12 [ASPECT] Warning: No suitable new res found! [ASPECT] Warning: No suitable new res found! [ASPECT] Warning: No suitable new res found! X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 3 0 X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 4 0 X11 error: BadAtom (invalid Atom parameter) X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 5 0 X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 6 0 X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 7 0 X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 8 0 X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 9 0 X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 10 0 X11 error: BadAtom (invalid Atom parameter)0/ 0 ??% ??% ??,?% 11 0