[FFmpeg-devel] [PATCH] avfilter/elbg: Extend filter to include alpha values in the quantization procedure

[Paul B Mahol]

On Mon, Sep 27, 2021 at 5:30 PM Michael Niedermayer <michael at niedermayer.cc>
wrote:

> On Sun, Sep 26, 2021 at 05:56:36PM +0000, Soft Works wrote:
> >
> >
> > > -----Original Message-----
> > > From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> > > Michael Niedermayer
> > > Sent: Sunday, 26 September 2021 18:52
> > > To: FFmpeg development discussions and patches <ffmpeg-
> > > devel at ffmpeg.org>
> > > Subject: Re: [FFmpeg-devel] [PATCH] avfilter/elbg: Extend filter to
> > > include alpha values in the quantization procedure
> > >
> > > On Sun, Sep 26, 2021 at 04:57:25AM +0000, Soft Works wrote:
> > > > Usage example:
> > > >
> > > > ffmpeg -y -loglevel verbose -i "..\fate-suite\apng\o_sample.png" -
> > > filter_complex "elbg=pal8=1:use_alpha=1" -frames:v 1 out.png
> > > >
> > > > Signed-off-by: softworkz <softworkz at hotmail.com>
> > > > ---
> > > >  doc/filters.texi      |  4 ++++
> > > >  libavfilter/vf_elbg.c | 25 ++++++++++++++++---------
> > > >  2 files changed, 20 insertions(+), 9 deletions(-)
> > >
> > > will apply
> >
> > Thank you.
> >
> > Please allow me another note: I think the naming of this filter
> > is terrible. I've gone through the list of all ffmpeg filters
> > many more times than the typical user, but without the specific
> > pointers I had gotten from you and a few other devs, I would
> > have never identified the "elbg" filter as something that
> > would do what I'm looking for.
>
> i would tend to agree, yes, in fact i think
> finding filters based on what they do is hard
> and iam not sure their names alone should be how they need to be found
>

Every filter have short description. So next time use grep or search
feature.


>
> thx
>
> [...]
> --
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> Old school: Use the lowest level language in which you can solve the
> problem
>             conveniently.
> New school: Use the highest level language in which the latest
> supercomputer
>             can solve the problem without the user falling asleep waiting.
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