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

[Thomas Mundt]

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.
>

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