unsupported interplay video

[Elon Musk]

Sample from here: ​http://samples.mplayerhq.hu/game-formats/interplay-mve/kpintro_error.mve does not play correctly.

Note that after few seconds size of video is changed.

This is bug happens because ipmovie.c demuxer registers change in video size but it is never passed to interplayvideo.c

[Carl Eugen Hoyos]

$ ffmpeg -i kpintro_error.mve
ffmpeg version N-35063-g2c28e26, Copyright (c) 2000-2011 the FFmpeg developers
  built on Nov 21 2011 23:10:43 with gcc 4.5.3
  configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
  libavutil    51. 26. 0 / 51. 26. 0
  libavcodec   53. 36. 0 / 53. 36. 0
  libavformat  53. 21. 0 / 53. 21. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 49. 0 /  2. 49. 0
  libswscale    2.  1. 0 /  2.  1. 0
[ipmovie @ 0x1395760] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 1000000.00 (1000000/1) -> 14.99 (125000/8341)
Input #0, ipmovie, from 'kpintro_error.mve':
  Duration: 00:08:51.12, start: 0.000000, bitrate: 352 kb/s
    Stream #0:0: Video: interplayvideo, pal8, 640x320, 14.99 tbr, 1000k tbn, 1000k tbc
    Stream #0:1: Audio: interplay_dpcm, 22050 Hz, 2 channels, s16, 352 kb/s
At least one output file must be specified

[Carl Eugen Hoyos]

POC attached.

[Elon Musk]

Patch works but it is not perfect, there is one error in decoding.

Should avcodec_set_dimensions() be used for this?

[Elon Musk]

Attached patch does not have error while decoding and plays OK in ffplay and at least plays in mplayer bigger part of sample.
MPlayer for some reason dumps few last frames for reason yet to find.

[Elon Musk]

Fixed in master.

[Carl Eugen Hoyos]

Did you test?
It does not work correctly here...

[Elon Musk]

Does work with ffplay, doesn't with ffmpeg. mplayer think it gets EOF and exits too early.

[Carl Eugen Hoyos]

That's why I think the problem has not been fixed.
ffmpeg is the primary application.