When I try using mencoder I get a seg fault. Not sure what could be causing this. I have the win32codecs installed and am trying to encode an indeo5 avi to flv.

mencoder "b[25].avi" -of lavf -oac lavc -ovc lavc -af lavcresample=22050 -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -mc 0 -lavcopts vcodec=flv:keyint=15:mbd=2:mv0:trell:v4mv:cbp:last_pred=3: predia=2: dia=2:cmp=2:subcmp=2: preme=2:vbitrate=700 -vf scale=528:297,harddup -ofps 30 -o "testOut.flv"

MEncoder 1.0rc1-3.3.5 (C) 2000-2006 MPlayer Team
CPU: Dual Core AMD Opteron(tm) Processor 175 (Family: 15, Model: 35, Stepping: 2)
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 - 0x164e00
AVI file format detected.
AVI_NI: No audio stream found -> no sound.
AVI: No audio stream found -> no sound.
VIDEO: [IV50] 512x512 24bpp 15.000 fps 1506.8 kbps (183.9 kbyte/s)
[V] filefmt:3 fourcc:0x30355649 size:512x512 fps:15.00 ftime:=0.0667
** 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: [harddup]
Opening video filter: [scale w=528 h=297]
==========================================================================
Opening video decoder: [dshow] DirectShow video codecs
Segmentation fault

Any Ideas?