$ mencoder /tmp/m4m-night-2007-x264.mpeg -ss 300 -endpos 30 -ovc copy -oac copy -of mpeg -o ~/www/test.mpeg
MEncoder dev-SVN-rUNKNOWN-4.1.2 (C) 2000-2006 MPlayer Team
CPU: AMD Athlon(tm) 64 Processor 3500+ (Family: 15, Model: 31, Stepping: 0)
3DNow supported but disabled
3DNowExt supported but disabled
CPUflags: Type: 15 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 - 0x7f308000
MPEG-PS file format detected.
VIDEO:  MPEG2  720x480  (aspect 2)  29.970 fps  9800.0 kbps (1225.0 kbyte/s)
[V] filefmt:2  fourcc:0x10000002  size:720x480  fps:29.97  ftime:=0.0334
==========================================================================
Requested audio codec family [a52] (afm=liba52) not available.
Enable it at compilation.
Requested audio codec family [ac3] (afm=libac3) not available.
Enable it at compilation.
Requested audio codec family [hwac3] (afm=hwac3) not available.
Enable it at compilation.
Cannot find codec for audio format 0x2000.
Read DOCS/HTML/en/codecs.html!
==========================================================================
PACKET SIZE: 2048 bytes, deltascr: 245760
videocodec: framecopy (720x480 24bpp fourcc=10000002)
Limiting audio preload to 0.4s.
Increasing audio density to 4.
Writing header...
INITV: 0.200, 0.167, fps: 29.970
Pos:   0.6s     18f ( 9%)  0.00fps Trem:   0min   0mb  A-V:0.000 [0:0]
BUFFER UNDEFLOW at stream 0, raising muxrate to 1980 kb/s, delta_scr: 223418

BUFFER UNDEFLOW at stream 0, raising muxrate to 2178 kb/s, delta_scr: 203107

BUFFER UNDEFLOW at stream 0, raising muxrate to 2395 kb/s, delta_scr: 184643

BUFFER UNDEFLOW at stream 0, raising muxrate to 2635 kb/s, delta_scr: 167857

BUFFER UNDEFLOW at stream 0, raising muxrate to 2898 kb/s, delta_scr: 152597

BUFFER UNDEFLOW at stream 0, raising muxrate to 3188 kb/s, delta_scr: 138725

ERROR: scr 0.740, dts 0.567, pts 0.600

ERROR: scr 1.095, dts 0.801, pts 0.834

BUFFER UNDEFLOW at stream 0, raising muxrate to 3507 kb/s, delta_scr: 126114
Pos:   1.2s     36f ( 9%)  0.00fps Trem:   0min   3mb  A-V:0.000 [4815:0]
ERROR: scr 1.623, dts 1.168, pts 1.201

BUFFER UNDEFLOW at stream 0, raising muxrate to 3858 kb/s, delta_scr: 114649

ERROR: scr 1.938, dts 1.401, pts 1.435

BUFFER UNDEFLOW at stream 0, raising muxrate to 4244 kb/s, delta_scr: 104226
Pos:   1.8s     54f ( 9%)  0.00fps Trem:   0min   7mb  A-V:0.000 [4849:0]
ERROR: scr 2.371, dts 1.768, pts 1.802

ERROR: scr 2.649, dts 2.002, pts 2.035

BUFFER UNDEFLOW at stream 0, raising muxrate to 4668 kb/s, delta_scr: 94751
Pos:   2.4s     72f ( 9%)  0.00fps Trem:   0min  11mb  A-V:0.000 [4875:0]
ERROR: scr 3.067, dts 2.369, pts 2.402

ERROR: scr 3.298, dts 2.602, pts 2.636
Pos:   3.0s     90f ( 9%)  0.00fps Trem:   0min  15mb  A-V:0.000 [4878:0]
ERROR: scr 3.698, dts 2.969, pts 3.003