[FFmpeg-trac] #4698(avcodec:reopened): Wrong channel layout for FLAC 3/1 channels on playback
FFmpeg
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Mon Jul 20 02:42:59 CEST 2015
#4698: Wrong channel layout for FLAC 3/1 channels on playback
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Reporter: Mango | Owner:
Type: defect | Status: reopened
Priority: normal | Component: avcodec
Version: unspecified | Resolution:
Keywords: flac | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Changes (by Mango):
* status: closed => reopened
* resolution: needs_more_info =>
Comment:
Replying to [comment:17 cehoyos]:
> Replying to [ticket:4698 Mango]:
> > this layout has been supported by FLAC for the past 9 years, since
since FLAC 1.1.3
>
> Please reopen this ticket if you can explain how I can reproduce above
claim (I failed).
I have already explained it above.
Since FLAC 1.1.3 (27-Nov-2006) (read the changelog, above) FLAC supports
all the channel layouts that are not supported by default using the
WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag.
This means, the WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag should be read if it
exists to get the correct channel positions.
Without reading this tag, the 3/1 channels (3 front 1 back) is played back
as 2/2 (2 front 2 back), which is wrong.
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Ticket URL: <https://trac.ffmpeg.org/ticket/4698#comment:18>
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