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

[Thomas Mundt]

2017-09-06 22:15 GMT+02:00 Thomas Mundt <tmundt75 at gmail.com>:

> 2017-09-01 1:55 GMT+02:00 Thomas Mundt <tmundt75 at gmail.com>:
>
>> 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.
>>
>
> Ping
>

Ping!