[FFmpeg-devel] 5.0 release

[Lynne]

13 Dec 2021, 20:04 by jamrial at gmail.com:

>
>
> On 12/13/2021 3:05 PM, Jean-Baptiste Kempf wrote:
>
>> On Mon, 13 Dec 2021, at 16:25, Michael Niedermayer wrote:
>>
>>> If you know of any major issues which need to be done before the release do them
>>> now. If you know of any issues which are release-blocking list them in a reply
>>> here please.
>>>
>>
>> Maybe the audio channel layout would be nice to settle before?
>>
>
> There are two or three requests/blockers, by Nicolas and i think Lynne.
>
> - The request to have either a string to give custom channels a name, or at least an opaque pointer per channel that can be used for such purpose. This has seen opposition from Anton.
>

Consensus was reached. A 16-bit opaque identifier, which users can
simply use as an index into their own frame opaque structure, if they
want, and a 16-bit channel identifier, which would result in a 32-bit
structure, which is pretty acceptable.


> - The request to allow a channel ID to be present multiple times. This has seen opposition from Anton and Hendrik (API user), and, if i understood it correctly, support from Marton.
>

Consensus was reached here too - keep the current behaviour. On
decoding, multiple channels with the same identifier may be present,
if the user requested a custom layout, or the codec explicitly stated
that the channels carry no meaning. On encoding, document that
encoders are allowed to drop undefined/user-defined channels, unless
the codec is capable of this (maybe add a codec flag to signal this).