[FFmpeg-devel] [RFC] lavf/tee per-output stream selection

[Paul B Mahol]

On 7/18/13, Stefano Sabatini <stefasab at gmail.com> wrote:
> On date Thursday 2013-07-18 12:32:46 +0200, Nicolas George encoded:
>> Le nonidi 29 messidor, an CCXXI, Stefano Sabatini a ecrit :
> [...]
>> > At some point it would be nice to make possible to select streams on
>> > the base of their metadata (e.g. to select only streams in a certain
>> > language) using stream selection, but I can devise a simple syntax,
>> > not involving demonic escaping issues.
>>
>
>> For that, I suspect the really good solution would be to use a real
>> scripting language to build filter graphs. And now, because of Clement,
>> ffmpeg is linked with liblua anyway.
>
> After some thought my conclusion was that SWIG would be a better
> solution than a single scripting language, and that lavfi filtering
> requires libav* scripting.
>
> OTOH this requires a serious effort, the kind which is probably doomed
> to fail unless there is some concertated effort and an economic
> incentive, maybe a related crowd-funding project may do since SOC
> projects seem not to be an option anymore for a reason or another (not
> that they were ever particularly effective at creating regular
> contributors or sponsoring internal developers).

Real scripting is really wanted.