Stutters in Quest. 90Hz Vs 72Hz?

[animemoko]

I'm using this for Quest and I'm impressed by the image quality and low latency, yet I get lots of stutters no matter how much I lower the options.
That led me into think it might be because the games are 90Hz and Quest display is 72Hz.
Is this something that could be fixed?

[magnoliafrost88]

This is something I wonder as well! Great question

[fdinsdale]

I know that on the version 2.3.X for the GO a change was made in the client to force 60FPS and that cleared up the stuttering. At 72FPS it was a stutterfest.

[magnoliafrost88]

But wait.... isn’t there a “force option to at least 60hz” in the client software now? It’s not optimal but that could maybe work? It can be found under [Other] in the app

[fdinsdale]

I don't know. I'm still using GO withe the old 2.3.X version.

If the new client has that option try selecting it.

60FPS on the Go stopped the stuttering.

[magnoliafrost88]

I just tried but it didn’t really do any difference :/

[fdinsdale]

on the ALVR app on your PC the first tab (server), does it show you are connected at 72 or 60 FPS?

[magnoliafrost88]

72

[polygraphene]

I confirmed similar issue.
It seems that some frames are skipped (shows the same frame two-times) on client side.
Actual frame rate is dropping to 40~50fps and loses smoothness of animation.
I'm investigating the issue.

[animemoko]

Great news! Thank you!!

[saintkamus]

That led me into think it might be because the games are 90Hz and Quest display is 72Hz.
Is this something that could be fixed?

The issue is not related to 90Hz, the games don't care about that. It looks like it's a problem with NVENC and only manifests itself at 72Hz. It's been like this since the Go came out.

On the Go, the fix was to use use a 60 Hz client someone forked, and it solved the issue.

I used to think it was because NVENC couldn't handle live streaming at more than 60 FPS, But devices like the nVidia shield can stream at 120 Hz, so It might just be a software problem (maybe driver related)

[saintkamus]

72

Quest doesn't support 60 Hz, at least not yet. John Carmack has confirmed that 60 Hz support is coming.

[ischicopter]

Same Problem here. Appears to happen only on Oculus titles through Revive. RoboRevive on the other hand works like a charm. No Problems with Steam Apps either.

It seems fine when remaining stationary. Moving objects are smooth as can be. But as soon as I move my head, things get stuttery/juddery. It is not a performance issue though, with the GPU being loaded at about 50%.

Apart from that, I am genuinely blown away by the streaming quality and low latency.
I found these settings to work best for my setup:
H.265
40 mbps
150% resolution in ALVR
100% resolution override in Steam VR

These will give around 60-80ms total latency and a stable stream.

Really impressed by the Quest‘s Display. Being able to boost it with supersampling from your PC beats Rift CV1 and Odyssey+, both of which I owned, by far in terms of overall sharpness and text readability.

I really hope the problem can be fixed soon.

Keep up the great work!

[animemoko]

Same Problem here. Appears to happen only on Oculus titles through Revive.

It also happens in Steam games

[animemoko]

72

Quest doesn't support 60 Hz, at least not yet. John Carmack has confirmed that 60 Hz support is coming.

That will be a solution to watch videos without stutter, but not for gaming... maybe for some stationary games only.

[ischicopter]

Same Problem here. Appears to happen only on Oculus titles through Revive.

It also happens in Steam games

Does it happen to you only when tracking or also when stationary?