[root@215 swf]# /usr/local/bin/mencoder war3.avi -nosound  -ovc lavc -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -lavcopts vcodec=flv -vf scale=100:75 -o warResized4.flv
MEncoder 1.0rc1-4.1.1 (C) 2000-2006 MPlayer Team
CPU: AMD Opteron(tm) Processor 254 (Family: 15, Model: 37, Stepping: 1)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2

success: format: 0  data: 0x0 - 0x3b812a
AVI file format detected.
AVI_NI: No audio stream found -> no sound.
VIDEO:  [DX50]  800x340  24bpp  24.002 fps  901.0 kbps (110.0 kbyte/s)
[V] filefmt:3  fourcc:0x30355844  size:800x340  fps:24.00  ftime:=0.0417
** MUXER_LAVF *****************************************************************
You have certified that your video stream does not contain B frames.
REMEMBER: MEncoder's libavformat muxing is presently broken and will generate
INCORRECT files in the presence of B frames. Moreover, due to bugs MPlayer
will play these INCORRECT files as if nothing were wrong!
*******************************************************************************
OK, exit
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [scale w=100 h=75]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
VDec: vo config request - 800 x 340 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 2.35:1 - prescaling to correct movie aspect.
SwScaler: reducing / aligning filtersize 33 -> 32
SwScaler: reducing / aligning filtersize 33 -> 32
SwScaler: reducing / aligning filtersize 19 -> 18
SwScaler: reducing / aligning filtersize 19 -> 18

SwScaler: BICUBIC scaler, from yuv420p to yuv420p using MMX2
SwScaler: using n-tap MMX scaler for horizontal luminance scaling
SwScaler: using n-tap MMX scaler for horizontal chrominance scaling
SwScaler: using n-tap MMX scaler for vertical scaling (YV12 like)
SwScaler: 800x340 -> 100x76
videocodec: libavcodec (100x76 fourcc=766c66 [flv])
VIDEO CODEC ID: 01f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.000 [0:0]
Writing header...
Pos:  30.0s    720f (99%) 472.44fps Trem:   0min   0mb  A-V:0.000 [269:0]
Flushing video frames
Writing index...
SEEK 4
SEEK 52
SEEK 148
SEEK 1020983

Video stream:  269.549 kbit/s  (33693 B/s)  size: 1009315 bytes  29.956 secs  720 frames