[FFmpeg-trac] #7287(avcodec:new): Audiotoolbox decodes 24-bit ALAC as 16-bit

FFmpeg trac at avcodec.org
Fri Jun 29 15:04:55 EEST 2018


#7287: Audiotoolbox decodes 24-bit ALAC as 16-bit
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             Reporter:  macdavis      |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  normal        |                Component:  avcodec
              Version:  git-master    |               Resolution:
             Keywords:  Audiotoolbox  |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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Comment (by bpa):

 Interesting - AFAICT the sample size in your file is 16 bit in alac atom
 of the MPEG4 header. Is that what you see as well ?

 I think players can determine the sample size from the audio stream so can
 play correctly ignoring MPEG4 ALAC atom details header except to say it is
 a ALAC stream.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7287#comment:3>
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