From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 2/2] avformat/riffdec: follow the MS docs more strictly for setting wav channel layouts
Date: Tue, 19 Mar 2024 01:15:54 +0100
Message-ID: <20240319001554.GI6420@pb2> (raw)
In-Reply-To: <20240317195729.11755-2-cus@passwd.hu>
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On Sun, Mar 17, 2024 at 08:57:29PM +0100, Marton Balint wrote:
> - Only parse the defined masks in dwChannelMask, unless strict_std_compliance
> is less than normal. This matches with the behaviour of the wav muxer.
> - Ignore additional bits in dwChannelMasks as the MS documentation suggests [1]
> - Assume UNKNOWN channels for missing bits as the MS documentation suggests [1]
>
> [1] https://learn.microsoft.com/en-us/previous-versions/windows/hardware/design/dn653308(v=vs.85)#details-about-dwchannelmask
>
> Signed-off-by: Marton Balint <cus@passwd.hu>
> ---
> libavformat/riffdec.c | 28 +++++++++++++++++++++++++---
> 1 file changed, 25 insertions(+), 3 deletions(-)
breaks:
./ffmpeg -i ~/tickets/2859/5.1plusdownmix.wav -ac 2 -t 100 -bitexact -c:a aac -y /tmp/2859-frenchspeack-nolibfaac.mp4
thx
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
There will always be a question for which you do not know the correct answer.
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next prev parent reply other threads:[~2024-03-19 0:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-17 19:57 [FFmpeg-devel] [PATCH 1/2] avformat/riff: pass an AVFormatContext explicitly to ff_get_wav_header Marton Balint
2024-03-17 19:57 ` [FFmpeg-devel] [PATCH 2/2] avformat/riffdec: follow the MS docs more strictly for setting wav channel layouts Marton Balint
2024-03-19 0:15 ` Michael Niedermayer [this message]
2024-03-19 19:14 ` Marton Balint
2024-03-21 8:23 ` Tobias Rapp
2024-03-21 9:40 ` Marton Balint
2024-03-21 10:26 ` Tobias Rapp
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