Re: [gentoo-user] skylake and x265 movie display

[Daniel Frey]

On 6/25/19 4:57 PM, Adam Carter wrote:
> My skylake (i3-6100U) system drops frames when watching x265 movies (in
> mpv and kodi), with all cores at 100% CPU. I've re-run through
> https://wiki.gentoo.org/wiki/Intel and tried changing from the intel
> driver to modsetting, and it appears to use less CPU for x264 at least.
> Still maxed out for x265 so I cant tell if there's a difference for that.
>
> I'm going through the USE flags for kodi, mpv and ffmpeg, which flags
> are the most important? Is there some way to run a simple movie playback
> benchmark to assess the impact of changes?
>
> Current settings;

What about USE flags for mesa and libva?

This wouldn't happen to be a 10-bit encoded x265, would it? If it is, 
10-bit hardware decoding is only supported in Kaby Lake or newer (this 
could explain it decoding in software/on CPU instead of GPU.)

I also had to boot with UEFI or no hardware decoding happened at all. 
Mine was old enough to give you a choice but video performance suffered 
in BIOS boot mode.

When I got my celeron-based NUC I discovered that just because the CPU 
has some hardware offloading doesn't mean software will use it. :(

Dan