[FFmpeg-devel] AVClass & AVOption [VOTE]

Marton Balint cus at passwd.hu
Sun May 29 23:01:10 CEST 2016

On Sun, 29 May 2016, James Almer wrote:

> On 5/29/2016 5:45 PM, Ronald S. Bultje wrote:
>> Hi,
>> On Sun, May 29, 2016 at 3:13 PM, Marton Balint <cus at passwd.hu> wrote:
>>> On Sun, 29 May 2016, Michael Niedermayer wrote:
>>> Hi
>>>> It was suggested in the IRC meeting today that i start a vote to
>>>> resolve if AVClass & AVOption should be added to AVCodecParameters
>>>> This question needs to be awnsered before the next release because
>>>> the ABI would be broken if its added afterwards
>>>> the lack of any decission blocks the release which is worse than
>>>> either decission, otherwise a vote might be silly for such technical
>>>> question but eve a bad decission is better than no decission here
>>>> The disadvanatges are:
>>>> 1 more field in the struct
>>>> a high level API that some feel is unneeded for AVCodecParameters
>>>> it could be confusing to some that there are 2 different ways to
>>>> access the fields
>>>> people might use it as av_log() context when they intended to use a
>>>> different context for it
>>>> There are probably more please help fill the list if you know more
>>>> The advanatges are:
>>>> More consistent availability of AVOptions and AVClass in public
>>>> structs
>>>> Makes supporting multiple FFmpeg versions and distros easier and
>>>> cleaner for applications. (reduces lists of #if version checks)
>>>> Provides default/min/max values, allows basic validity checking within
>>>> min/max
>>>> Avoids mysterious crashes if an application uses avoption functions
>>>> on AVCodecParameters
>>>> Introspection
>>>> Serialization support that may be usefull for ffserver or an application
>>>> replacing ffserver
>>>> An application that doesnt want to use AVOptions or AVClass can
>>>> completey ignore them.
>>>> Please state clearly if you agree to add AVClass&AVOption to
>>>> AVCodecParameters or if you disagree about adding it or if you dont
>>>> care either way
>>>> The vote will end 1 week from now, simple 50% majority (Yes vs no)
>>>> I dont really know who should be eligible for voting, so i suggest
>>>> everyone from the vote comittee but iam happy with anything, just
>>>> stating somethng ...
>>> I am in favor of adding AVClass.
>> You're not in the list [1]?
>> Ronald
>> [1] https://ffmpeg.org/pipermail/ffmpeg-devel/2015-October/182207.html
> At least one the person in the list has apparently left the project, so maybe
> we could suggest adding recurrent contributors like Marton and Thilo.

I beieve there was an expansion when I got already included:



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