[FFmpeg-trac] #7622(avformat:new): Support another Electronic Arts format

[FFmpeg]

#7622: Support another Electronic Arts format
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:             |                 Status:  new
  enhancement                        |              Component:  avformat
               Priority:  wish       |               Keywords:
                Version:  git-       |  electronicarts
  master                             |               Blocking:
             Blocked By:             |  Analyzed by developer:  0
Reproduced by developer:  0          |
-------------------------------------+-------------------------------------
 Another type of ea samples was uploaded by an irc user, contains mpegvideo
 and adpcm (?) audio, file type is `MGAV`.
 {{{
 $ ffmpeg -i EAS.PS2
 ffmpeg version N-92718-g092cb17 Copyright (c) 2000-2018 the FFmpeg
 developers
   built with gcc 6.4.0 (GCC)
   configuration: --enable-gpl --enable-libxml2 --enable-gnutls --enable-
 gmp --enable-version3
   libavutil      56. 24.101 / 56. 24.101
   libavcodec     58. 42.102 / 58. 42.102
   libavformat    58. 24.101 / 58. 24.101
   libavdevice    58.  6.101 / 58.  6.101
   libavfilter     7. 46.101 /  7. 46.101
   libswscale      5.  4.100 /  5.  4.100
   libswresample   3.  4.100 /  3.  4.100
   libpostproc    55.  4.100 / 55.  4.100
 [mpeg1video @ 0x434ac80] Invalid frame dimensions 0x0.
 [mpegvideo @ 0x4349500] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, mpegvideo, from 'EAS.PS2':
   Duration: 00:00:04.32, bitrate: 4096 kb/s
     Stream #0:0: Video: mpeg2video (Main), yuv420p(tv,
 bt470bg/bt470m/bt470m, progressive), 512x448 [SAR 7:6 DAR 4:3], 4096 kb/s,
 29.97 fps, 59.94 tbr, 1200k tbn, 59.94 tbc
 At least one output file must be specified
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/7622>
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