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

[Soft Works]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Paul B Mahol
> Sent: Monday, 27 September 2021 18:37
> 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 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
> >

The names can't be it alone, but good naming would be a helpful 
element.


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

You have added a large range of audio filters and I'm sure many of
them are very useful, but I'm afraid that often I do not have the
slightest clue about what they are doing, not even when reading the
description text ;-)

softworkz