Possible fullscreen issue: Jerky video in fullscreen on ATI

Hey all!

What’s the deal when VVVV gets serious framerate issues in fullscreen, whilst everything is hunky-dory in windowed mode.

Perhaps it’s something to do with syncing (i’m using multiple windows).

Any ideas what mechanisms could be causing a significant difference in performance when using fullscreen but not when windowed?

Using ATI Radeon 7870

elliot

Maybe try setting Presentational Interval of all renderers (except one) to immediatly?

My presentation intervals were set to not wait for frame btw. will try with 1 set to wait and other set to not

No fix for this issue.

News:
The problem also occurs with a single renderer when in fullscreen.

News: it’s jerky without video (simple rendering)

EDIT : VideoTexture/FileStream were still connected to each other, but not connected to a renderer.
Breaking this connection fixes framerate issue.
Video resolution is 4k.

Again: no issues in windowed mode (even when chrome-less fullscreen-scaled windows).

Update / Warning:
Having the Info node connected to the VideoTexture causes a slowdown.

Reporting bug to devs: slowdown in fullscreen video playback of high-res video when info node connected to VideoTexture

Further update:

Video is also jerky (10fps) in fullscreen, but not in windowed (stretched as described above).

Still working on narrowing down source of issue…

end results:
splitting the render across 2 GPU’s (rather than cross-fire on 1, we moved the 2 eyefinity groups to separate standalone gpu’s) solved the major issue above.
This could be for a number of reasons. I doubt it’s anything to do with ‘gpu load’, more likely the output canvas having issues when it’s vey large/irregular

end results:
splitting the render across 2 GPU’s (rather than cross-fire on 1, we moved the 2 eyefinity groups to separate standalone gpu’s) solved the major issue above.
This could be for a number of reasons. I doubt it’s anything to do with ‘gnu load’, more likely the output canvas having issues when it’s vey large/irregular