[FFmpeg-devel] [PATCH] avfilter: add radial and circular blur video filter

[Michael Niedermayer]

On Tue, Aug 11, 2020 at 11:54:41AM +0200, Paul B Mahol wrote:
> On 7/29/20, Paul B Mahol <onemda at gmail.com> wrote:
> > On 7/28/20, Nicolas George <george at nsup.org> wrote:
> >> Paul B Mahol (12020-07-28):
> >>> >> Please add an example that produces high quality output.
> >>> >> Iam asking so the filter can be tested in relation to the concerns
> >>> >> that
> >>> >> have been raised in previous reviews
> >>
> >>> Ping.
> >>
> >> Did I miss the new patch with a high quality output example?
> >
> > Defaults already give high quality output.
> >
> 
> Ping.

sorry for the delay

Ive finally tested this a bit and looks better than i expected but its
not completely free of artifacts

For example i used testsrc as source and downscale it to have a smooth input for testing
./ffplay  -f lavfi -i testsrc=4096x4096 -vf scale=128:128
adding rblur looks quite ok but if its scaled up artifacts become vissible

See the moving rainbow band it changes from having smooth borders
 ./ffplay  -f lavfi -i testsrc=4096x4096 -vf scale=128:128,scale=512:512
 vs.
 ./ffplay  -f lavfi -i testsrc=4096x4096 -vf scale=128:128,rblur,scale=512:512
 
I think its fine to add these filters to git master. Further improvments would
of course be always great!
 
thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Those who would give up essential Liberty, to purchase a little
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