• SLR

  • Local files super laggy

I tried to enable IGPU in Bios to connect one display to the build in GPU. I use displays:
1. 1920x1200 @ 60 hz (now on the built in GPU, secondary monitor)
2. 2560x1440 @ 120 hz
3. 2880x1440 @ 90 hz (VR headset)

When I google 1070 GTX it says it can handle 7680x4320 @ 60Hz = 1990 Mpixel/s. My displays are total of 953 Mpixel/s. But as you say if the 7k video still needs to be handeled in 90 hz it will eat up the power really fast. This video still works fine in WMR portal though, so it is possible to play this video in VR on my computer. Just not in the SLR app right now. Also the 2160p online video lags and it is not too high resolution for my graphics card.

One thing I have not mentioned before that might influence. In the SLR app the video is "more 3d". It is changed a bit, at least on my headset. So it is rerendered or something. Or more distance between the eyes. Compared to if I play the same video in WMR portal or other places.

    PS, my main issue right now is that I would like to be able to play 2160k videos online in SLR software, or even 2700k. I can play offline videos in WMR portal if it is tricky to get them to work 100 % in the SLR software.

    Rakly3 Unless you're using viewport, you are rendering the full 7K no matter how small your display is.

    Wait, is your WMR using viewport?

        brado SLR app the video is "more 3d". It is changed a bit, at least on my headset. So it is rerendered or something.

        yes, the app itself and interface is rendered in unity, but the video is codec.

          Rakly3

          Ah forgot this one, it uses HDMI + USB3, so two cables in one. I guess the USB3 is for power, sound and other things.

              brado I'm 90% sure it's refresh-rate related.
              Sound is likely also over HDMI.
              Just lower the refresh rate of SteamVR.

              Power should not be an issue, assuming your monitors have their own power supply. But as you said, it works WMR.
              The interface of DeoVR (Unity) also has to be rendered aside from your monitors and VR video.

              You could try to force the interface to run on your IGFX, I'm not sure that will fix it though, or could even create other issues. But it's always worth a try, you can undo it whenever you want.
              Like I run my browser on my IGFX (which display doesn't matter. Doesn't even need a display attached.)

              Settings > Display > Graphics Settings > Desktop app > Browse > \Steam\steamapps\common\DeoVR Video Player\DeoVR.exe > Pick prefered GPU.

              This shouldn't change which GPU decoder is used! That's set in the codec settings. Only the rendering of the app is changed.

              This can also help in game performance if you change your background apps from GPU.

              Another solution could be using QuickSync decoder for the video. Then you are running the video on the IGFX. Though the Nvidea decoder is 'better'.

                Very interesting, my web browser always use a bit of power, it's good to use the build in GPU to handle it. I set DeoVR now to the build in GPU. Didn't make any noticable difference though.

                In SteamVR I cannot change the refresh rate but I found that in settings in Windows 10 I can change the WMR headset refresh rate to 60 or 90 hz. I tried 60 hz and then it was also 60 hz in SteamVR, but looked a little bit laggy. Maybe it gives only 30 hz per eye then or something? The video in SLR had less problems when I used 60 hz, no artifacts and less freezes. So it helped kinda, but still no real flow, still laggy.

                Upgrading the computer would probably help. But I would like my CPU or GPU to work at 100 %. Now they both work around 50 % only for the 2160p online videos and I get lag. Something is strange with that. In games they can work 100 % or while doing video rendering in for example the software Resolve.

                PS, I also uninstalled HEVC but it didn't make any difference so I havn't installed it back again.

                  brado
                  Glad to hear it gotten a bit better though.
                  Have you tried unplugging your 2nd monitor, just for testing?

                  brado Maybe it gives only 30 hz per eye then or something?

                  To my knowledge no, as far your PC is concerned it's one display. But I never actually thought of checking that, something for my to-do list! 🙂 Could be different depending on HMD. It would however still be 2x 60Hz though.

                  brado PS, I also uninstalled HEVC but it didn't make any difference

                  If you are using AVC (h264) videos it indeed doesn't make a difference.

                        3 months later

                        as information, i also had laggy video on some 5K and 7K local video, and I fixed it by buying HEVC on MSStore (no free version anymore, it seems) and disabling DirectShow.
                        I downloaded KLite Mega and follow what was proposed in this thread but nothing worked.

                        With DirectShow ON, it work like 5 seconds, and then freeze a bit and then laggy as hell.

                        If there is better fix, please let me know

                          Etshy if the videos are h265/HEVC then you must have the HEVC codec installed, correct. You can whatever you want with the k-lite pack, but without that codec it's never gonna work.

                          h264/AVC does work without purchasing the HEVC codec.

                          Etshy Did you have the free version installed prior, but it still wouldn't work? Just curious if MS disabled the free version from working completely.

                              5 days later

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