No longer getting full/smooth framerate in VR View / OpenVR OBS plugin

[Tiger Johnson]

This issue seems to have started 2 to 3 weeks ago. Looks like all the frames from a game aren't being passed through to steamVR's VR view (or legacy desktop mirror) or the OBS OpenVR input plugin.

Looks almost like some kind of re-projection frame limiter is being applied, cutting framerate to 45. In headset, I'm getting the full 90 fps and not seeing and reprojection artifacts, so I don't think repro is actually on.

I've tried: Rolling back Nvidia drivers from most recent 445.75 to 430.86. Also tried all available beta and non beta options of WMR for SteamVR and SteamVR. No change.

Forcing on motion smoothing / reprojection in the per application settings in SteamVR just makes it worse when setting to "forced on"

Example 1: https://youtu.be/TcLJ5hy5dkw

Example 2: https://youtu.be/NWIVpetwl24

Example 3: (might just be my imagination, but it almost looks like SteamVR overlays are not affected by this bug): https://youtu.be/V-S7tAwHXaw

I have over 1,200 hours in SteamVR and have been streaming VR with my Odyssey for about a year and a half now, and this is def new to me.

A report from another user: https://www.reddit.com/r/Steam/comments/fr3ccp/steamvr_vr_view_low_fps/

And another:
https://www.reddit.com/r/WindowsMR/comments/ftxk2p/record_video_at_60fps/fmanh60/

[Tiger Johnson]

More data can be seen in this SteamVR support thread.
https://steamcommunity.com/app/250820/discussions/3/2146470329514484710/

A user made a tool to show frame rate differences. Here's a vid I made with the tool. MUST be watched at 720p 60 to see results. https://www.youtube.com/watch?v=Aj2G1TxsSQ8

It lets you set an RPM for a spinning line. You can see the line "stabilize" into one at 30 fps for the OBS plugin and SteamVR window, while the game capture still shows two lines even at 60 rpm. A fun bonus of using youtube, is that you can flip between 720p at 60fps and 480p which is at 30 fps to see how the Game Capture line looks when limiting everything to 30 fps. Then all the lines match.

Pretty conclusive that SteamVR and the OpenVR OBS plugin are being limited to 30fps now.

[[ J ]]

+1 please we need a fix for this... Steam should test the software across multiple VR headsets including WMR before releasing anything, hence if this gets worse people will no longer buying stuff in the VR section anymore.

[BOLL]

To be fair this is about capture, not what is experienced in the headset, I'd bet only a minority of VR players record/stream and would notice this problem. I still want them to fix it though, because I want VR to be successful which includes content creators sharing it, but just saying I can see how it would not be a priority or calling for a hotfix.

[Deceptive Pastry]

I and one other person so far have found that downgrading to SteamVR version 1.10.20 (released Feb 28) has fixed this issue at least for the OBS OpenVR plugin. Temporary solution for those who stream until they fix it properly in an update. Guide on how to downgrade is there as well, post #11.

https://steamcommunity.com/app/250820/discussions/0/2268069450214724270/

[Berkan]

Deceptive Pastry の投稿を引用：

I and one other person so far have found that downgrading to SteamVR version 1.10.20 (released Feb 28) has fixed this issue at least for the OBS OpenVR plugin. Temporary solution for those who stream until they fix it properly in an update. Guide on how to downgrade is there as well, post #11.

https://steamcommunity.com/app/250820/discussions/0/2268069450214724270/

If we downgrade SteamVR, will it affect our keybindings? Will it affect MixedVR? (WMR+Index) :/

[Tiger Johnson]

Berkan の投稿を引用：

If we downgrade SteamVR, will it affect our keybindings? Will it affect MixedVR? (WMR+Index) :/

Downgrading steamVR no longer works. There is currently no workaround for this issue.

[Otávio]

You can downgrade SteamVR but you're going to need to either use Cheat Engine to re-enable Steam's manifest patcher/downloader or use fifty-six/zig.SteamManifestPatcher. I reverted SteamVR to 1.10.20 and WMR to the March 20 depot/version at it works fine.