[FFmpeg-devel] [DISCUSSION] Motion Estimation API/Library

Davinder Singh ds.mudhar at gmail.com
Tue Aug 1 12:18:33 EEST 2017

Hi Nicolas,

On Tue, Aug 1, 2017 at 11:57 AM Nicolas George <george at nsup.org> wrote:

> Le quartidi 14 thermidor, an CCXXV, Davinder Singh a écrit :
> > As we've been planning since forever (
> > https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/snow.h#L182,
> > http://ffmpeg.org/pipermail/ffmpeg-devel/2016-July/197095.html) we need
> > Motion Estimation code that could be shared in codecs and motion filters.
> >
> > The idea is to make the Motion Estimation idependent of Encoders more
> > specifically - AVCodecContext.
> This is a very good idea.
> > So, I’ve moved motion estimation and me_cmp code to a new location -
> > libmotion <https://github.com/dsmudhar/FFmpeg/tree/gsoc17/libmotion>. I
> > think it’s a good idea to make a new lib instead moving it to
> > libavutil (as discussed
> > previously <
> http://ffmpeg.org/pipermail/ffmpeg-devel/2016-July/197161.html>).
> > That way we can make it independent of everything else in FFmpeg.
> But this is not. Please no, not yet another library!
> A separate library like that will at the beginning only be used by the
> handful of hard-core developers. Unless it meets a wide success very
> fast, with very useful tools available immediately, it will soon be
> forgotten ("seems interesting, but not yet mature, I'll come back and
> see in six months") and start bitrotting as soon as you have moved to
> something else.
> In particular, the main policy of FFmpeg is to not depend on external
> libraries for core features. Therefore, if your project is a separate

Just to be clear, it won't be "external" library like OpenCV...

> library, it will definitely not be used by FFmpeg codecs like you wish
> in your first paragraph.
> If you want a fighting chance of a project that is not stillborn, I
> think you need to make it part of FFmpeg, and make sure important

.. it will be part of FFmpeg like libavfilter, just a new module -

> components of FFmpeg use it as soon as possible.
> Regards,
> --
>   Nicolas George
> [...]

Davinder Singh

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