[FFmpeg-trac] #1965(avformat:open): mmf: support correctly formats ma-3/5/7

FFmpeg trac at avcodec.org
Sun Oct 18 08:06:22 EEST 2020

#1965: mmf: support correctly formats ma-3/5/7
             Reporter:  ami_stuff   |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  adpcm smaf  |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
Changes (by zane):

 * analyzed:  0 => 1
 * cc: zane@… (added)


 I've just had a look at the spec
 and I'm pretty sure what's being heard when the checks are removed is the
 "Score Track Stream PCM Data Chunk" (Mtsp) part of the MTR chunk.

 There's a bit of static at the start too, which suggests that's the rest
 of the chunk being decoded as adpcm.

 I'd be inclined to say the current behaviour is correct.

Ticket URL: <https://trac.ffmpeg.org/ticket/1965#comment:7>
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