Some .mkvs show no duration and stop playing after 10 minutes.
Sample FFMPEG info from one of these files below, please assist:


ffmpeg version git-N-30186-gd9d5603, Copyright (c) 2000-2011 the FFmpeg developers
built on May 25 2011 12:16:07 with gcc 4.4.2
configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffprobe --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
libavutil 51. 2. 1 / 51. 2. 1
libavcodec 53. 6. 0 / 53. 6. 0
libavformat 53. 2. 0 / 53. 2. 0
libavdevice 53. 0. 0 / 53. 0. 0
libavfilter 2. 10. 0 / 2. 10. 0
libswscale 0. 14. 0 / 0. 14. 0
libpostproc 51. 2. 0 / 51. 2. 0
[matroska,webm @ 01320320] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 47.95 (5000000/104271) -> 23.98 (24000/1001)
Input #0, matroska,webm, from 'F:\Movies\High Definition\Harry Potter and the Prisoner of Azkaban (2004) 1080p.mkv':
Duration: 02:21:42.17, start: 0.000000, bitrate: 448 kb/s
Stream #0.0(eng): Video: h264 (High), yuv420p, 1920x800, PAR 1:1 DAR 12:5, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Stream #0.1(eng): Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s (default)
At least one output file must be specified


---> DB Level Info: 51