fix matrox mpeg2 I-frame hd 1280x720

[ami_stuff]

This codec supports only 3 resolutions, there are some problems with 1280x720 resolution (FFmpeg reports errors in I-frames)

1280x720:

​http://www1.datafilehost.com/d/9377b7a9

1440x1080:

​http://www1.datafilehost.com/d/160390de

1920x1080:

​http://www1.datafilehost.com/d/01f7ea78

C:\>ffmpeg -i 1280.avi out.avi
ffmpeg version N-53680-g0ab9362 Copyright (c) 2000-2013 the FFmpeg developers
  built on May 30 2013 12:14:03 with gcc 4.7.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
  libavutil      52. 34.100 / 52. 34.100
  libavcodec     55. 12.102 / 55. 12.102
  libavformat    55.  8.100 / 55.  8.100
  libavdevice    55.  2.100 / 55.  2.100
  libavfilter     3. 73.100 /  3. 73.100
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[mpeg2video @ 02997ee0] Invalid frame dimensions 0x0.
[mpeg2video @ 02997ee0] Warning MVs not available
[mpeg2video @ 02997ee0] concealing 80 DC, 80 AC, 80 MV errors in I frame
Input #0, avi, from '1280.avi':
  Duration: 00:00:07.51, start: 0.000000, bitrate: 36787 kb/s
    Stream #0:0: Video: mpeg2video (4:2:2) (M701 / 0x3130374D), yuv422p, 1280x72
0 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 23.97 tbn, 59.94 tbc
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf55.8.100
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1280x720 [SAR 1:1 DA
R 16:9], q=2-31, 200 kb/s, 23.98 tbn, 23.98 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video -> mpeg4)
Press [q] to stop, [?] for help
[mpeg2video @ 02997ee0] Invalid frame dimensions 0x0.
[mpeg2video @ 02997ee0] Warning MVs not available
[mpeg2video @ 02997ee0] concealing 80 DC, 80 AC, 80 MV errors in I frame
[mpeg2video @ 02997ee0] Warning MVs not available
[mpeg2video @ 02997ee0] concealing 80 DC, 80 AC, 80 MV errors in I frame
[mpeg2video @ 02997ee0] Warning MVs not available
[mpeg2video @ 02997ee0] concealing 80 DC, 80 AC, 80 MV errors in I frame
    Last message repeated 49 times
frame=   52 fps=0.0 q=31.0 size=     362kB time=00:00:02.16 bitrate=1368.3kbits/
concealing 80 DC, 80 AC, 80 MV errors in I frame
[mpeg2video @ 02997ee0] concealing 80 DC, 80 AC, 80 MV errors in I frame
    Last message repeated 56 times
frame=  110 fps=0.0 q=31.0 size=     642kB time=00:00:04.58 bitrate=1146.8kbits/
concealing 80 DC, 80 AC, 80 MV errors in I frame
[mpeg2video @ 02997ee0] concealing 80 DC, 80 AC, 80 MV errors in I frame
    Last message repeated 56 times
frame=  168 fps=112 q=31.0 size=     952kB time=00:00:07.00 bitrate=1113.5kbits/
concealing 80 DC, 80 AC, 80 MV errors in I frame
[mpeg2video @ 02997ee0] concealing 80 DC, 80 AC, 80 MV errors in I frame
    Last message repeated 10 times
frame=  180 fps=112 q=31.0 Lsize=    1015kB time=00:00:07.50 bitrate=1107.7kbits
/s
video:1005kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.988754%

[Michael Niedermayer]

Replying to ami_stuff:

1280x720:

​http://www1.datafilehost.com/d/9377b7a9

1440x1080:

​http://www1.datafilehost.com/d/160390de

1920x1080:

​http://www1.datafilehost.com/d/01f7ea78

The links dont work anymore

[Carl Eugen Hoyos]

Samples are in ​http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket2615/

[Michael Niedermayer]

Fixed in 7d776062f97d14d5d9db96764f4785c91fb3e1f2