[FFmpeg-devel] [PATCH 4/4] ffmpeg: replace custom channel_layout code with an SpecifierOpt based one

[James Almer]

On 3/19/2022 3:29 PM, Michael Niedermayer wrote:
> On Fri, Mar 18, 2022 at 07:47:48PM -0300, James Almer wrote:
>> This is cleaner and allows fine tuning which stream the option is applied to.
>>
>> Signed-off-by: James Almer <jamrial at gmail.com>
>> ---
>>   fftools/ffmpeg.h     |  2 ++
>>   fftools/ffmpeg_opt.c | 84 ++++++++++++++++++--------------------------
>>   2 files changed, 36 insertions(+), 50 deletions(-)
> 
> Not sure its intended or not but
> This changes the output of
> 
No, it's probably not intended.

> ./ffmpeg -channel_layout 3.0 -ac 3 -f u8 -i /dev/zero -t 1 /tmp/file-old.wav

I assume (since i can't test) that a 2.1 layout is being set instead, if 
any.
Guess i need to change how and with what priority "channels" and 
"ch_layout" in pcm demuxer are parsed.

> 
> thx
> 
> [...]
> 
> 
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