Bug 93573

Summary:

bad performance with 4k h264 video

Product:

xorg

Reporter:

Karol Herbst <karolherbst>

Component:

Driver/nouveau

Assignee:

Nouveau Project <nouveau>

Status:

RESOLVED FIXED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

normal

Priority:

medium

Version:

git

Hardware:

Other

OS:

All

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
screenshot of the video	none
debug output of mesa	none
crash while playing reencoded video	none

Description Karol Herbst 2016-01-04 05:25:16 UTC

I noticed a while back already, that nouveau handles 4k video not that well currently.

I tried it out with the cactus-4k video from here: http://www.elementaltechnologies.com/resources/4k-test-sequences

Nvidia doesn't have any problem playing that video at full speed, but on my kepler nve6 card even full reclocked nouveau only handles this at 45% speed and the PVLD engine is at max load (only around 80% with nvidia)

Comment 1 Karol Herbst 2016-01-04 05:56:52 UTC

Created attachment 120787 [details]
screenshot of the video

also I noticed that the output is total garbage. so I assume something else is fishy here.

Comment 2 Karol Herbst 2016-01-04 06:06:07 UTC

Created attachment 120788 [details]
debug output of mesa

Comment 3 Karol Herbst 2016-01-04 06:29:32 UTC

Created attachment 120789 [details]
crash while playing reencoded video

I just reencoded this video just to test if special encoding flags would let nouveau play that video, but I got a crash instead

Comment 4 Karol Herbst 2016-01-04 06:57:00 UTC

side note: slightly smaller videos (3840x2100) are working much better, so maybe there is only a tiny issue somewhere

Comment 5 Karol Herbst 2016-01-05 19:28:21 UTC

fixed in current mesa master

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.