[MPlayer-dev-eng] Fw: Fw: Missing AV_CODEC_ID_ADPCM_IMA_QT entry in mp_taglists.c #2

[Mats Peterson]

Well, it will play the file, but it will think it's raw PCM since the fourcc won't be set properly to 'ima4' in matroskadec.c until it has been patched the way I mentioned.

Mats -- 
Mats Peterson
http://matsp888.no-ip.org/~mats/
    ----- Forwarded Message -----
  From: Mats Peterson <matsp888-at-yahoo.com at ffmpeg.org>
 To: "mplayer-dev-eng at mplayerhq.hu" <mplayer-dev-eng at mplayerhq.hu> 
 Sent: Wednesday, December 9, 2015 3:19 PM
 Subject: [MPlayer-dev-eng] Fw: Missing AV_CODEC_ID_ADPCM_IMA_QT entry in mp_taglists.c #2
   
Oh, I'm sorry. MPlayer probably won't play the audio at all, since I've made a patch to FFmpeg's matroskadec.c that makes it recognize audio with private data >= 36 bytes, which is really the correct value to use since that's the size of a format 0 sound sample description in QuickTime. Currently that value is 86, and the private data in the sample file is 76 bytes, so I guess it won't recognize it without the FFmpeg patch (which isn't in the official source yet).
Mats 
-- 
Mats Peterson
http://matsp888.no-ip.org/~mats/
    ----- Forwarded Message -----
  From: Mats Peterson <matsp888-at-yahoo.com at ffmpeg.org>


 To: "mplayer-dev-eng at mplayerhq.hu" <mplayer-dev-eng at mplayerhq.hu> 
 Sent: Wednesday, December 9, 2015 3:04 PM
 Subject: [MPlayer-dev-eng] Missing AV_CODEC_ID_ADPCM_IMA_QT entry in mp_taglists.c #2
  
It seems my attachment was too big in the previous mail, in spite of my efforts. Anyway, here is an even smaller audio sample. Now on to the issue once again:
MPlayer is currently unable to play QuickTime IMA ADPCM encoded audio in Matroska, due to a missing entry in mp_taglists.c. I have attached a small Matroska file with QuickTime IMA ADPCM encoded audio. No video, to keep the size small. On playback, it will distort, since MPlayer obviously thinks it's raw PCM audio. I have also attached a patch for libmpdemux/mp_taglists.c that adds the missing entry.

Mats -- 
Mats Peterson
http://matsp888.no-ip.org/~mats/
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