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[DocCharky]

I've not experienced this myself at all, but if it only happens with mismatched content maybe something is up, although I wouldnt know what right now.
Logs may help.

I use frame rate matching, so I'm not sure the issue is related to mismatched content.

[mykillk]

I'm also getting regular frame drops using the new present queue mode. The bigger the queue, the more drops I get. I'm running NVIDIA driver 560.94 on a RTX 4080, Windows 11 23H2. Monitor is running at 119.88 hz.

The attached capture from the MSI Afterburner graph window may be helpful. It shows a comparison of using Presentation Queue On (15 frames) vs. Presentation Queue Off.

Some takeaways that I noticed:

• Core clock is running about 3x higher with the Queue On and is a bit spikey. With Queue Off it's flatlined to the lowest possible clock rate of 210 Mhz.
• GPU usage is lower with Queue Off
• Frametime is erratic with Queue On. The Frametime with Queue Off is consistent with the source frame rate (23.976 fps)

Something else I noticed is that there seems to be a high correlation between drops in the Decode Queue (i.e. going to 5-6) and frame drops. My experience with MadVR was that having a slightly larger CPU Decode buffer than the GPU Render buffer helped cut out frame drops. By having the Decode and Render buffer sizes the same, a sequential bottleneck is introduced (i.e. trying to both decode and then render a frame within the same frametime budget). By having the CPU decode buffer even one frame larger, there's no longer that bottleneck because the CPU and GPU are essentially processing different frames in parallel. It also adds one frametime length for the pipeline to "catch up" when the Decode buffer falls behind.

I've also attached a screenshot of some settings in MadVR that might be helpful, related to GPU flushing.

[CompEx]

When I activate "Present Queue" video doesn't show up and I get this error message (see attachment). When I deactivate it, video shows up properly, but I get some stuttering (very rare and very short, but visible), so I stick to madvr.

Is there a solution to this? I alread deinstalled and reinstalled JRiver without any success.

Kind regards
CompEx

[CompEx]

SOLVED: Yesterday, the intel driver update utility installed the new Intel-GPU-Driver and that solved the problem, obviously introduced by the GPU-Driver it installed 2 Weeks ago.

Kind regards

[JimH]

Thanks for reporting.

[CompEx]

Too bad, error message is back...

I don't understand this: present queue worked for some time, than didn't work, than worked fine once, but failed again next time. Couldn't make it work properly again.

Kind regards
CompEx

[tkolsto]

I just tried tick on hardware accelatated video decoding. I never use it. But this are creating glitches or stop rendering entirely. when ticked off(one can watch a movie and sooner or later it just freeze and stop rendering)...I have never had any problems, until i ticked this feature on. Strange.

[CompEx]

Update: the intel driver update utility just installed a new gpu-driver for my NUC8. I was surprised, that this version was older than the two last driver-updates. But it solved my problems with the present queue. And this time I tried with an extra restart of the OS and I didnt't get the error message. So everything's back to normal.

Kind regards
CompEx

[JimH]

Thanks for the report.

[CompEx]

Updated to Windows 24H2 and the error message with present queue is back... madvr still works fine.

Kind regards
CompEx

[smichalove]

Here is how to enable VSYNC for NVIDIA

This was not obvious but it solves my issues in 33.0.55 so thought as a PSA I'd post it:

Open the NVIDIA Control Panel:

Right-click on your desktop and select "NVIDIA Control Panel."
Navigate to 3D Settings:

In the left sidebar, click on "Manage 3D settings."
Find Vertical sync:

Under the "Global Settings" tab, scroll down until you see "Vertical sync."
Enable VSync:

Click the dropdown menu next to "Vertical sync" and select "On."
Apply Changes:

Click the "Apply" button at the bottom right of the window to save your changes.

[flac.rules]

This is something that you use instead of reclock if I understand correctly? How is the latency? Reclock adds some latency.

[tkolsto]

No the nvidia setting to vertical sync to "on" is to prevent stutter. Videoclock is also to improve motion too. It is not either way. But I Am no expert, but I have never read that these two features are two different ways. The nvidia setting is a must for many or all using JRiver.

I myself do not use videoclock, but always do the nvidia setting above. Also this new feature; Present Queue...I experience better motion and more stability in motion handling in day to day movie rendering, also less artifacts too. I stay on sdr as this is best for motion, but hdr is significantly better with this new feature too. If I on rare occations use hdr..I always turn off tonemapping as this introduces artifacts on my lg b1 oled. (Newer LGs or Sonys may not have any problem, as I read that interpolation on newer tvs sets have improved quite a bit.)


Update!

I just read this on doom9 from a jriver user(manni). He writes that on nv driver 572.16 he does not need vsync set to on in np. Also if you where to use videoclock, its advised to set display auto changer to auto (just read this in their wiki on their videoclock feature).

as for mannis findings I paste his comment below:

"It also looks like, at least with JRiver, it's not necessary to set vsync on in nv panel in order to avoid unreported frame drops. I've only played a short bit of my test clip (Pacific Rim) and I couldn't see any unreported frame drops. With previous drivers, it was obvious and frequent.

If this isn't confirmed, it would be great if JRiver allowed to specify if we want vsync enabled or not, that way we could leave "Use the 3D App setting" option in NV panel.

I only had to disable Gsync, as always. Normal power seems to be working fine too (but that was the case already with previous versions)."

[flac.rules]

I wasn't thinking about the nvidia setting, I was talking about the "present queue" function in MC.

[tkolsto]

Ok. I have never read anything about the importance of low latency on movie rendering with JRiver/JRVR. I Am no expert, but when I read about latency it is almost solely about gaming. Maybe somebody will reach out to You on this matter. You can also make a thread on your question too (new topic).

[mykillk]

I would be very surprised if JRiver software is not enabling v-sync by default. I would not think that force enabling it through the driver control panel would be necessary. But if it's not being done in the software, I agree that it definitely should be enabled by default.

[flac.rules]

Sorry to ask this again, but I don't quite understand this function? Is present que a replacement for reclock? To ensure you don't get dropped frames but without the latency from reclock?

[Wasper]

Hello,

This feature seems to improve smooth video playback for me.  However, audio is totally out of synch.  I'm using usb audio.  Without the present queue on, no audio synch problem.  Any  idea how to fix that?

Thanks

[JimH]

https://wiki.jriver.com/index.php/VideoClock

[Wasper]

https://wiki.jriver.com/index.php/VideoClock

I've tried this option and it's no help.  I kept testing and I just figured out that the out of sync problem are only on HDR video (HLG, PQ) transferred to HDR10.  Sometimes native HDR10 plays fine while trying multiple restart but mostly audio are 1-2 seconds ahead of video like HLG, PQ.