[FFmpeg-devel] [PATCH 001/289 v6] Add a new channel layout API

[James Almer]

On 1/20/2022 9:58 AM, Michael Niedermayer wrote:
> On Wed, Jan 19, 2022 at 09:09:13PM -0300, James Almer wrote:
>>
>>
>> On 1/19/2022 3:07 PM, Andreas Rheinhardt wrote:
>>> James Almer:
>>>> From: Anton Khirnov <anton at khirnov.net>
>>>>
>>>> The new API is more extensible and allows for custom layouts.
>>>> More accurate information is exported, eg for decoders that do not
>>>> set a channel layout, lavc will not make one up for them.
>>>>
>>>> Deprecate the old API working with just uint64_t bitmasks.
>>>>
>>>> Expanded and completed by Vittorio Giovara <vittorio.giovara at gmail.com>
>>>> and James Almer <jamrial at gmail.com>.
>>>> Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>
>>>> Signed-off-by: James Almer <jamrial at gmail.com>
>>>> ---
>>>> Changes since last version:
>>>>
>>>> *av_channel_layout_from_string() and av_channel_layout_describe() now support
>>>>    a "designation at name" syntax, effectively making both functions reciprocal
>>>>    when there are custom names in some or all channels.
>>>>    It's the syntax suggested by Marton and is both extensible if required and
>>>>    not too ulgy in human readable output if the string is printed verbatim.
>>>>
>>>> *av_channel_layout_index_from_string() and
>>>>    av_channel_layout_channel_from_string() also support this syntax now.
>>>>
>>>> I plan to push this version soon. Any extension to the syntax supported by these
>>>> helpers can be written by whoever needs it.
>>>
>>> You forgot the examples and the tools; and ffplay. And do you really
>>
>> Ported ffplay. Will port the rest later.
>>
>>> intend for the deprecation warnings in ffmpeg_opt.c to stay?
>>
>> Ok, I'll silence them.
> 
> this commit
> 09d90fabb4a4ca60548f6ba6b05fab9f74a0eb9e is the first bad commit
> commit 09d90fabb4a4ca60548f6ba6b05fab9f74a0eb9e
> Author: Anton Khirnov <anton at khirnov.net>
> Date:   Tue May 7 07:20:32 2013 +0200
> 
>      cook: convert to new channel layout API
>      
>      Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>
>      Signed-off-by: Anton Khirnov <anton at khirnov.net>
>      Signed-off-by: James Almer <jamrial at gmail.com>
> 
> :040000 040000 eab7c20e8185cb7f2e78055a425eecb777cf8ff1 52f53fbe995ff4381073fd6e545dfccdcc75fb1c M	libavcodec
> 
> affects this:
> libavformat/tests/seek && libavformat/tests/seek ~/tickets/1605/08.rm -frames 10
> 
> many timestamps become NOPTS
> 
> thx

Should be fixed.

> 
> [...]
> 
> 
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