19 replies to this topic

[AlMightyBob]

Hey folks, made a nice performance discovery today for Oculus users! There's a 3rd party project called OpenComposite that aims to streamline the additional computing load of having to run SteamVR-bound games (like VPXVR) through the Oculus runtime. It's been around a while but when used in VPXVR, it would simply freeze when loading most tables. No bueno.

I'm a rank amateur but I spent today playing with the VPXVR source code seeing what I could learn about it and Visual Studio seemed to point to a deadlock between a bunch of threads relating to sound functions when this crash occured. I couldn't make heads or tails of the multithreading code but later I saw that OpenComposite has an Audio Patching feature that can be optionally disabled. It's really just a minor convenience feature so it was worth a try and hey presto! Works fantastic!

 

The Fix

1. Install OpenComposite as you normally would by simply replacing openvr_api.dll in your Visual Pinball folder with the one from the OC website. Delete the original or rename it in case you want to revert. https://gitlab.com/z...aster/README.md
2. Create a new text file in the same folder called opencomposite.ini and inside it simply add the line enableAudio=false

https://i.imgur.com/XpwaxcI.png

 

Done! Devilishly simple.

My performance has gotten a significant boost on my AMD system with a Rift CV1. I can even crank the settings right up now! I think it should help with all Oculus devices but if folk can test it out and report back, that would be appreciated!

 

Update: Some have reported rendering 'weirdness' and positions ingame being off so if things aren't right then hit the 'Reset to Defaults' button and go from there. The Supersampling Factor option may be causing issue just now so set to default 1.0 and use external Supersampling tools (like Oculus Tray Tool) if you still want to increase it (you should if your system can handle it!). OpenComposite itself can do this actually by simply adding another line to the opencomposite.ini file -->  supersampleRatio=1.5 if you want the equivalent of 150% in SteamVR. 1.0=100%(default), 2.0=200%, etc.

Edited by AlMightyBob, 01 July 2020 - 06:34 PM.

[Sixtoed]

Works really well.
Devs be warned when you quit out of a table now thought it exits VPX totally, not dropping you back to the editor.

[unclewilly]

Will thT work with the frontend table

[AlMightyBob]

Not sure, I've never used it. If anyone finds out let us know!

 

I also haven't yet gotten familiar with the many VPX addons for pup-packs and DMDs that are out there so do chime in folks if there's issues.

[Slydog43]

I keep a shortcut to opencomposite on my desktop just in case I run into issues with random steamVR games.  I really haven't needed to use it though for a while.  Thanks for your info.

[rothbauerw]

This is nice!  I'm only getting sound through my speakers, not my headset.  Is that the only way this will work or do I have something misconfigured?

[Slydog43]

roth, did you just run OpenComposite or did you do the init edit  enableAudio=false

[AlMightyBob]

That sounds like normal behaviour, you just need to manually switch your audio output device to your headset in Windows once you've launched the game. If OpenComposite's Audio Routing feature wasn't broken then it wouldn't be necessary but it's a small price to pay.

[rothbauerw]

roth, did you just run OpenComposite or did you do the init edit  enableAudio=false

 

That sounds like normal behaviour, you just need to manually switch your audio output device to your headset in Windows once you've launched the game. If OpenComposite's Audio Routing feature wasn't broken then it wouldn't be necessary but it's a small price to pay.

 

Yes, I have the init file with enableAudio=False

 

Makes sense AllMightyBob, thanks!

[monza]

I am getting "OpenComposite DLLMain ERROR: Cannot init VR: unsupported apptype 3" with my Oculus CV1, any ideas?

 

[smakx]

I am getting "OpenComposite DLLMain ERROR: Cannot init VR: unsupported apptype 3" with my Oculus CV1, any ideas?

 

If you are still having this issue, I was able to fix it by setting VR to "enabled" in vp's vr settings, instead of the default of "auto".

[benjn]

hey guys,

 

sorry to bohter you on this, but I can't get a hand on opencomposite 32 bits dll  - the link from the gitlab doesn't work... 

any chance to find it somewhere else ? tried google it but no chance...

thanks

 

BenJN

[studlygoorite]

hey guys,

 

sorry to bohter you on this, but I can't get a hand on opencomposite 32 bits dll  - the link from the gitlab doesn't work... 

any chance to find it somewhere else ? tried google it but no chance...

thanks

 

BenJN

Sure thing, here ya go https://drive.google...35n?usp=sharing

Edited by studlygoorite, 19 January 2022 - 11:26 PM.

[benjn]

Thanks ! 

 

 

hey guys,

 

sorry to bohter you on this, but I can't get a hand on opencomposite 32 bits dll  - the link from the gitlab doesn't work... 

any chance to find it somewhere else ? tried google it but no chance...

thanks

 

BenJN

Sure thing, here ya go https://drive.google...35n?usp=sharing

 

Thanks !!

[nikketrikke]

hi great advices!!!

 

i have problem with the keyboard.. sometimes works sometimes not...

do not work keys to lay.. while the f3 or esc work...

wghat have to tdo?

thanks

Edited by nikketrikke, 07 March 2022 - 09:21 PM.

[bietekwiet]

Doesn't work with Virtual Desktop unfortunately. At least not with the settings posted here.

[thomas123]

The Opencomposite Boost does not only work for Quest2 users. It also gives a significant boost to Pimax Crystal users as I could discover today. Of course, you use the Pimax dll instead of the Oculus dll. And Enthusiast's hint is important: Set VR to "enabled" in vp's vr settings, instead of the default of "auto" to avoid "unsupported apptype 3" errors. With that I can play the new VPWs Godzilla on a RTX3090 on 90 Hz without any frame drops in incredibly realistic resolution...

[toxie]

Did you use https://gitlab.com/z...R/-/tree/openxr ? Thanks for the heads up!

[blindpeser]

The Opencomposite Boost does not only work for Quest2 users. It also gives a significant boost to Pimax Crystal users as I could discover today. Of course, you use the Pimax dll instead of the Oculus dll. And Enthusiast's hint is important: Set VR to "enabled" in vp's vr settings, instead of the default of "auto" to avoid "unsupported apptype 3" errors. With that I can play the new VPWs Godzilla on a RTX3090 on 90 Hz without any frame drops in incredibly realistic resolution...

Could you please share your whole pc-rig? Isnt the Crystal pretty heavy? How long can you play without any neck issues?

[griffindodd]

Thanks for this useful tip. I have a Quest 2 that I stream all kind of PC-based VR to over WiFi, haven't gotten around to diving into VPVR yet but it's something on my radar.