[FFmpeg-devel] AVClass & AVOption [VOTE]

Ronald S. Bultje rsbultje at gmail.com
Sun May 29 23:30:15 CEST 2016


Hi,

On May 29, 2016 4:59 PM, "James Almer" <jamrial at gmail.com> 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.

Probably, yes. Is it just Thilo or are others missing also? What were the
criteria again?

Ronald


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