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

[Thomas Mundt]

2017-09-01 1:22 GMT+02:00 Michael Niedermayer <michael at niedermayer.cc>:

> On Fri, Sep 01, 2017 at 01:18:11AM +0200, Michael Niedermayer wrote:
> > 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
>
> ahh, forgot, you may want tp add the tests you did and their results
> to the commit message


Sure, new patch attached.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-avfilter-interlace-prevent-over-sharpening-with-the-.patch
Type: application/octet-stream
Size: 9736 bytes
Desc: not available
URL: <http://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20170901/ad46c70f/attachment.obj>