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@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@gmail.com>
> > > and James Almer <jamrial@gmail.com>.
> > > Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
> > > Signed-off-by: James Almer <jamrial@gmail.com>
> > > ---
> > > Changes since last version:
> > > 
> > > *av_channel_layout_from_string() and av_channel_layout_describe() now support
> > >   a "designation@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@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@gmail.com>
    Signed-off-by: Anton Khirnov <anton@khirnov.net>
    Signed-off-by: James Almer <jamrial@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

[...]

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