F:\temp>mencoder G:\movies\PandaKing.mkv -o PandaKing.h264 -of rawvideo -nosound -ovc copy
MEncoder Sherpya-SVN-r28311-4.2.5 (C) 2000-2009 MPlayer Team
CPU: Intel(R) Core(TM)2 Duo CPU     E4500  @ 2.20GHz (Family: 6, Model: 15, Step
ping: 13)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

success: format: 0  data: 0x0 - 0x57762f47
[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]  800x336  24bpp  23.976 fps    0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:31  fourcc:0x31637661  size:800x336  fps:23.976  ftime:=0.0417
videocodec: framecopy (800x336 24bpp fourcc=31637661)
Pos:1370.7s  32864f (25%) 358.93fps Trem:   4min 1107mb  A-V:0.000 [1707:0]