(2014-03-31, 15:33)Trixster Wrote: After a bit more testing I agree that 0.14 is very marginally better than 0.8, for both sd and 720p content.
Is there a way to make this the default kernel for these resolution videos, but leave 1080p untouched? It's a pain to have to go into the OSD for each sd/720p video.
Just change it and enabled the "set as default for all videos".
For 1080p video on a 1080p display, the scaling kernel won't be used, so no need to worry.
It is likely there will be a change to the default scaling kernel soon as 0.14 does seem preferred (it was my favourite too).
Ideally we should stretch the shape of the kernel with the scaling ratio.
These were the kernels:
0.00 Sinc over the range +-3*PI with Hamming window applied,
0.02 Sinc with Hamming window applied,
0.04 Sinc over the range +-2.5*PI with Hamming window applied,
0.06 Sinc,
0.08 Sinc with Blackmann window applied,
0.10 Sinc with no side lobes,
0.12 Sinc with half the first side lobe
0.14 Mitchell Netravali (with B=1/3,C=1/3)
0.16 nearest_neighbour,
Here's another suggested by the image scaling guy (you can just enter that while video is playing):
Code:
vcgencmd scaling_kernel 0 -4 -8 -14 -18 -19 -16 -8 9 39 77 122 166 206 237 255 255 237 206 166 122 77 39 9 -8 -16 -19 -18 -14 -8 -4 0
It's a cubic with A=-0.5.