[FFmpeg-trac] #3646(undetermined:new): caf muxer doesn't write correct format id in desc chunk for ALAC
FFmpeg
trac at avcodec.org
Fri May 16 18:28:45 CEST 2014
#3646: caf muxer doesn't write correct format id in desc chunk for ALAC
-------------------------------------+-------------------------------------
Reporter: nu774 | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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How to reproduce:
{{{
% ffmpeg -i foo.alac.m4a -c:a copy bar.alac.caf
}}}
In case of ALAC, mFormatID field of desc chunk has to be one of the
following:
1: 16bit
2: 20bit
3: 24bit
4: 32bit
ffmpeg caf muxer always writes zero.
This is not very important since these information is included in codec
startup data (magic cookie), but incorrect anyway.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3646>
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