[Mesa-dev] [PATCH 1/2] vl: add a lanczos interpolation filter v3

[Andy Furniss]

Nayan Deshmukh wrote:
> Hi Andy,
>
> Thanks for testing my patches.

NP


>> The scaling happens after CSC.

OK, thanks.


> I believe there is some misunderstanding here, I was able to see the
> artifacts in the video that you sent me previously. But I was not
> able to replicate them

Yea, I got that - just thought you may want to see how they had changed.

> with the pendulum video on my system. Same case this time the
> pendulum video plays fine this time too. I am attacing a video of it
> here
>
> https://drive.google.com/file/d/0B1s62k5GtdBwOVAtOUVaU0V5c1E/view?usp=sharing

Hmm, that's interesting for a few reasons.

Though my monitor won't do 1366x768 I can replicate the same scale
factor windowed with mplayer ... -xy 768/576 ...

At first glance only level 2 is obviously artifacted (though very close
inspection shows others are slightly).

Levels: for some reason your vid has the black bars at 0 but the content
isn't scaled - like your mplayer didn't expand tv to pc on playback.
This shouldn't happen by default. Do you have some extra config
somewhere like in $HOME/.mplayer, if so maybe better to test without.

Most important - though the vp9 compression may be to blame I can't
really see any difference between the levels in that vid.

In fact closely comparing just your level 1 to my (admittedly
uncompressed) level 1 and 0 output scaled the same plus unstretched
levels wise it looks to me like you are getting level 0 on this test.