./mencoder sg1_919.avi -oac copy -ovc lavc -vf scale -lavcopts vcodec=mjpeg:format=422P -o crap.avi -frames 2
MEncoder dev-SVN-r21532-4.0.1 (C) 2000-2006 MPlayer Team
CPU: AMD Athlon(tm) Processor (Family: 6, Model: 6, Stepping: 2)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE

success: format: 0  data: 0x0 - 0xa222d38
AVI file format detected.
VIDEO:  [FMP4]  352x240  24bpp  23.976 fps  431.0 kbps (52.6 kbyte/s)
[V] filefmt:3  fourcc:0x34504D46  size:352x240  fps:23.98  ftime:=0.0417
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [scale]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
audiocodec: framecopy (format=706d chans=2 rate=48000 bits=0 B/s=9354 sample-0)

v_timer_corr 0.0000 (0.0f), pts_corr 0.0000 (0.0), pts 0.042
want to skip 0 frames
VDec: vo config request - 352 x 240 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: BICUBIC scaler, from yuv420p to yuv422p using MMX2
SwScaler: using 4-tap MMX scaler for horizontal luminance scaling
SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling
SwScaler: using 1-tap MMX "scaler" for vertical scaling (YV12 like)
SwScaler: 352x240 -> 352x240
videocodec: libavcodec (352x240 fourcc=47504a4d [MJPG])