Poor frame rate in Deo, High frame rate in Media Player Classic

boboweb

Just dont waste your time with LAVFilters reinstall . Read my first post in this topic and try it .

Alternombly

boboweb Neither of those helped me I'm afraid.

EDIT: But I went back to the most recent version of Deo and some combination of things has improved the framerate at least. I've still got lag when seeking though.

philpw99

Alternombly The LAV icons should appear in the lower right corner of your computer screen, where it's called "notification area", and where the little speaker and time should be.
When you open DeoVR and start playing a video, you should see those 3 LAV icons appear in that "notification area", otherwise DeoVR is not using LAV to decode, it uses something else. If this is the case, you need to use "Codec Tweaking Tool" to fix it.

From my experiments, it does seem DeoVR have a problem with maximum hardware decoding for some videos.
Those 7k and 8k video needs over 60% of decoder power to decode. Yet DeoVR will not give the Nvidia decoder all the power. Therefore the video appears to be choppy and slow. Yet the VR frame rate is still good (90Hz).

Alternombly

philpw99 Okay, the notification area, I understand where to look now, thank you.

Thing is, I can't get them to appear. I've installed HEVC, then the K-lite codec pack, and I've been into the tweaker tool. I've looked at:

Configuration > DirectShow Filters > LAV video decoder > formats > select everything & deselect "Use Microsoft WMV9 MFT decoder for WMV3 and VC-1"

Configuration > DirectShow Filters > LAV Splitter > Input formats > select everything

Codec and Filter Management > Preferred splitters > set everything possible to LAV Filters

Win7DSFilterTweaker > Preferred decoders > set everything possible to LAV Filters

And nothing seems to make any difference. I'm just looking for specific instructions to follow.

philpw99

Your case is very strange. Once you set the "Preferred splitters", you should be done, and you should have seen the LAV icons. Maybe you haven't check the "Enable System Tray Icon" in LAV settings?

Anyway, I have some 8k videos which played just fine while a 7k video could not. I looked around and found out that if the video's color format is yuv420p 8bit, then it will be fine, the GPU decoder will go up to 90%.

But if the video's format is yuv420p 10bit, then my GeForce 1080 just cannot play anything over 5k smoothly, the GPU decoder will go up to 60%. The video will be slow and choppy.

So in order to play those video, I have to transcode them to 8bit. The transcoded video file, even with the same frame size, codec and bit rate, play smoothly in DeoVR again.

Maybe our admin @Yar here can help us dig deeper?

P.S. My ffmpeg command to transcode:

"C:\ffmpeg\bin\ffmpeg.exe" -hwaccel cuda -i "%1" -vf "format=yuv420p" -c:v hevc_nvenc -preset slow -f matroska -b:v 30M -maxrate: 40M -c:a copy "%~dpn1-out.mkv"

put the above line in a file like "10bitTo8bit.cmd" , then just drag your video file onto this cmd file.

Alternombly

philpw99 Okay, so some strange stuff going on, but it's kind of working, for now? I don't know how I achieved it.

I double-checked, and the system tray icon is enabled.

In Windows Media Player, performance is now worse, choppy and laggy.

BUT in DeoVR, where it matters, performance is now smooth and responsive.

I only did two things, restart my computer, and enable beta for SteamVR and WMR for SteamVR.

The icons still don't appear.

Thanks for the help, I wish I could explain how it works, but I have no idea.

philpw99

Hello @boboweb and @vrmaster ! Could you do me a favor and check the files you had problem playing before? Are their color depth 10bit or 8bit? MediaInfo can be great help.
Right now I am having cases that all my 3840p 8bit videos play just fine, but a 3630p 10 bit video is choppy and almost unplayable. So I think maybe this is the reason why 9.x DeoVR is slower than the 8.x.

boboweb

philpw99

Phil - actually all the files that are over 6K have the issue with low framerate when play them with DeoVR 9.xx .
Have you been tried to check the Alternative decode in DeoVR options ? This helps for me . I am on Quest 2 via VirtualDesktop and GTX 1080 Ti.

philpw99

boboweb
Yup, I can confirm that when I first use the new DeoVR, most of my videos won't play nice. It was kinda upsetting.
After that sad beginning, I installed the K-Lite codec pack and used the "Codec Tweak Tool". I set the LAV splitter as the preferred one and LAV video to use hardware decode (Cuvid).
Things turned around 180 degree. I can play most videos smoothly, but some 7k and 8k videos were still not playing well. At that time I had to use the following ffmpeg command to lower their resolution to 5k.

"C:\ffmpeg\bin\ffmpeg.exe" -hwaccel cuvid -i "%1" -c:v hevc_nvenc -vf scale_cuda=5400:2700 -preset slow -f matroska -b:v 30M -maxrate: 40M -c:a copy "%~dpn1-out.mkv"

Then suddenly I found 3 videos with 3860p resolution play nicely in DeoVR. They all have the same 8bit color depth. So I use the following command to transcode a previously unplayable 3630p video:

"C:\ffmpeg\bin\ffmpeg.exe" -hwaccel cuda -i "%1" -vf "format=yuv420p" -c:v hevc_nvenc -preset slow -f matroska -b:v 30M -maxrate: 40M -c:a copy "%~dpn1-out.mkv"

As you can see, this command doesn't change anything except the pixel format to 8bit. The resulted video plays just fine in the new DeoVR.
Therefore, from now on I will have to transcode all 10bit videos to 8bit. The lost of little color detail doesn't really matter. Most importantly it works.

boboweb

philpw99

You didnt answer if you try to check "Alternative if default doesnt work" in deovr options ?

philpw99

Uh... My answer was actually "no, I don't need to because now I can play my 7k and 8k just fine." For the ones that are not working, I can trans-code them to be playable as well.

There is little benefit to use "alternative decode" in DeoVR. The default method, direct draw, works just fine. The alternative method, Media Foundation, not really works for me. I'll just stick to the default "direct draw" method.

Hellsingoff

Same here, HEVC 10 bit plays half-speed in DirectMode (even in Windows Media Player). Nothing helps: install hevc extension in MSstore, reinstall klite, change acceleration in LAV Filters.

HEVC 8 bit is smooth on NVIDIA CUVID acceleration.

Weirdness:
I have two laptops. Both have the latest steam version of the application and k-lite installed. On one of them, HEVC 10 bits are played if Direct is disabled. On the second, if you disable Direct, an error VP9 occurs.

philpw99

Right now HEVC is working great for me. 10bit or 8bit, they all played smoothly.
If you see the error about "VP9 not installed", you need to turn off the "unity player" in the settings.
Most video that's above 7k will not play at first, like HEVC was frozen and doesn't know what to do. I click on "Use directshow" and the video will start playing, but in a low fps way. Then I turn off the directshow switch. Suddenly HEVC knows how to handle the file, even an 8k 10bit video is no problem. I will get over 60fps consistent rate with my good old GTX1080 video card. After that, the file is remembered by DeoVR, and you don't need to do the "switch-on-switch-off" trick any more.

Hellsingoff

philpw99
Thank you for reply.
It's strange, but i tried to turn off unity player, nothing is changed. I will try it again today.
On my laptop i have slow playing even in Windows Media Player - it's no chances to smooth working DeoVR that way.
Can you tell me what is your LAV Filter settings? My settings are here: click
Do you have normal playing 10 bit HEVC in Windows Media Player?
Sorry for my bad english

philpw99

The LAV setting is the same like mine. I don't use Window media player for a long time. VLC, PotPlayer, MPV... everyone is better than the WMP.
I just tested one 7k video with WMP. It's so slow, like 1 fps.
Use PotPlayer and the playback is smooth, not a single frame is dropped.
So no, WMP in Windows 10 is like abandonware. Don't ever use it.

Hellsingoff

philpw99 WMP is a good test for codecs and HW acceleration, usually i use MPC on windows and VLC on linux. When i change LAV Filters settings - playback is changing in WMP and DeoVR the same way. I checked it again - unity player is turned off, but i have VP9 error on alternate mode and i can't turn off the directshow. I don't know what to do and keep changing 10 bits to 8 bits

philpw99

In WMP I have basically no control of what codec and video renderer it should use. Therefore if there is a problem in play back. There is nothing I can do about it. It just won't work.
So I don't understand why you said "WMP is a good test for codecs". You cannot even switch the codec like any other media players.
I think I remembered it wrong. When you see VP9 error, it means you are using alternative mode. Don't use this mode either.
I think you are playing videos with directshow on. Directshow is the reason you cannot playback 10bit smoothly. You should only use it only to start the playback, then switch it off immediately.
Yeah, I converted like 10+ videos from 10bit to 8bit, then I stopped. It's too much trouble. I hope you can find a solution like me.

Hellsingoff

philpw99
I can't turn off DirectShow - when I press the switch, it turns off and immediately turns back on.

The codecs used by the WMP can be controlled using the LAV Filter - when switching codecs in its settings, they are applied to the WMP after it is restarted. As playback changes in WMP, so does the behavior of DeoVR. If the video stops opening in WMP, it stops opening in DeoVR. If playback comes with freezes - it is with freezes and in DeoVR. With DirectShow turned on, at least.

The application simply does not allow me to turn off DirectShow on the second laptop where Nvidia 3060 is installed. On the first laptop (Nvidia 2060) directshow is turned off and playback is smooth.

philpw99

Hellsingoff I can't turn off DirectShow - when I press the switch, it turns off and immediately turns back on.

Ah, now I see the problem. Your HEVC codec is not working. DeoVR has to use DirectShow to play the video.
Grab the latest HEVC codec and install it. If HEVC works, you should be able to turn DirectShow OFF.

Hellsingoff

philpw99
As i said in the first post... Nothing helps: install hevc extension in MSstore, reinstall klite, change acceleration in LAV Filters.

I tried to install "hevc from device manufacturer" from MS Store and HEVC is contained in k-lite, which I tried to reinstall. None of the methods, alas, did not help. The codec is exactly seen by the system - if i remove the extension and k-lite - the video stops playing in the WMP.

PS Now I completely reinstalled k-lite again. By cleaning the registry and rebooting after uninstalling. It got worse and better at the same time - now HEVC 10 bit is not playing in WMP and it has become more difficult to test. But directshow in DeoVR started to turn off, but only for HEVC 8 bits, 10 bits still have unswitchable directshow

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