[FFmpeg-devel] [PATCH] avfilter/interlace: prevent over-sharpening with the complex low-pass filter

[Michael Niedermayer]

On Thu, Aug 31, 2017 at 10:40:12PM +0200, Thomas Mundt wrote:
> 2017-08-31 21:42 GMT+02:00 Michael Niedermayer <michael at niedermayer.cc>:
> 
> > On Wed, Aug 30, 2017 at 03:54:08AM +0200, Thomas Mundt wrote:
> > > Hi,
> > >
> > > we did a transcoding cascade test at work were over-sharpening became
> > > visible with the complex low-pass filter. This patch rectifies the
> > > behaviour.
> > >
> > > Please comment...
> >
> > did you perform subjective and or objective tests ?
> >
> > objective being some metric like PSNR vs correctly sampled data
> > subjective being double blind tests with humans about which they prefer
> >
> 
> The tests have been subjective with a team of video engineers and
> technicians with several test files.
> 
> I did a quick SSIM/PSNR check with the first generation of an HD->SD file
> as a reference against the 6th generation.

if its better then iam fine with it. No more comments from me

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

I have often repented speaking, but never of holding my tongue.
-- Xenocrates
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