906 ~ $ md5sum video.mp4 
4666a5dedff03fe80d503a74aa3c209b  video.mp4
907 ~ $ mplayer -vo null -endpos 30 video.mp4 
MPlayer dev-SVN-rUNKNOWN-4.1.2 (C) 2000-2008 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (Family: 15, Model: 2, Stepping: 7)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

Playing video.mp4.
libavformat file format detected.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8709fd4]edit list not starting at 0, a/v desync might occur, patch welcome
[lavf] Audio stream found, -aid 0
[lavf] Video stream found, -vid 1
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: [faad] AAC (MPEG2/4 Advanced Audio Coding)
FAAD: compressed input bitrate missing, assuming 128kbit/s!
AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 16000->176400)
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio) decoder)
==========================================================================
DVB card number must be between 1 and 4
AO: [null] 44100Hz 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 undefined - no prescaling applied.
VO: [null] 1280x720 => 1280x720 Planar YV12 
A:  30.0 V:  30.0 A-V:  0.001 ct: -0.061   0/  0 71%  0%  1.8% 0 0 $<50>

Exiting... (End of file)
908 ~ $