matrox mmes codec + lowres option = crash

[ami_stuff]

matrox mmes codec crashes with lowres option enabled (ffmpeg & ffplay)

​http://samples.multimedia.cx/V-codecs/MMES/matrox_bad_gops.avi

ffmpeg -vlowres 1 -i matrox_bad_gops.avi out.avi

C:\>ffmpeg -i "C:\matrox_bad_gops.avi"
FFmpeg version git-N-29181-ga304071, Copyright (c) 2000-2011 the FFmpeg develope
rs
  built on Apr 18 2011 21:24:03 with gcc 4.5.2
  configuration: --enable-gpl --enable-version3 --enable-runtime-cpudetect --ena
ble-memalign-hack --enable-avisynth --enable-bzlib --enable-frei0r --enable-libo
pencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --
enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger
 --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enabl
e-libx264 --enable-libxavs --enable-libxvid --enable-zlib --cross-prefix=i686-w6
4-mingw32- --target-os=mingw32 --arch=x86_32 --extra-cflags=-I/home/kyle/softwar
e/ffmpeg/external-libraries/win32/include --extra-ldflags=-L/home/kyle/software/
ffmpeg/external-libraries/win32/lib --pkg-config=pkg-config
  libavutil    50. 40. 1 / 50. 40. 1
  libavcodec   52.120. 0 / 52.120. 0
  libavformat  52.108. 0 / 52.108. 0
  libavdevice  52.  4. 0 / 52.  4. 0
  libavfilter   1. 79. 0 /  1. 79. 0
  libswscale    0. 13. 0 /  0. 13. 0
[mpeg2video @ 022721B0] mpeg_decode_postinit() failure
[avi @ 01CEC000] max_analyze_duration reached

Seems stream 0 codec frame rate differs from container frame rate: 50.00 (50/1)
-> 6.25 (25/4)
Input #0, avi, from 'C:\matrox_bad_gops.avi':
  Metadata:
    encoder         : Lavf52.68.0
  Duration: 00:02:00.04, start: 0.000000, bitrate: 698 kb/s
    Stream #0.0: Video: mpeg2video (4:2:2), yuv422p, 720x576 [PAR 16:15 DAR 4:3]
, 15000 kb/s, 25 fps, 6.25 tbr, 25 tbn, 50 tbc
    Stream #0.1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
At least one output file must be specified

[ami_stuff]

The crash is eliminated here. Please test and if fixed, close this ticket.

[ami_stuff]

This is fixed on win32 as well (no crash).