Topic: stuttering and dropped frames

Hello,

I have been using SVP for years and it is fantastic. I can't watch movies without it. My config is:
Intel i9-10850K + Nvidia Quadro RTX 5000 (roughly RTX2080 performance level) + Win10. I am using MPC-HC / MPV Video render output + SVP / fixed 60 fps. I can watch a whole movie without a single dropped frame and zero problem. This is my main PC.

But now I have built a new PC in the living room just for watching movies (HTPC). Intel i5-12400 + Nvidia RTX 4060 8GB + Win11. I think both machine is more than enough for 1080p@60fps. But with this new PC i have a problem. There is a constant  stuttering and frame drops. It's realy annoying. I don't know what is the problem I tried many-many-many settings in SVP and MPC, i tried different VGA driver.... but nothing helps. SVP (and mpc-hc) is up-to-date.

I chose a random episode from yellowstone (1080p MKV). I can watch it on the main computer without a single frame drop, but on the HTPC there are more than 400 dropped frames.

Please help me guys. Any ideas are welcome.

I have attached 2 pictures showing the problem.

If you need any other info or details or settings or logs just let me know.

Post's attachments

_htpc_.jpg 273.76 kb, 2 downloads since 2025-06-10 

_mainpc_.jpg 269.19 kb, 2 downloads since 2025-06-10 

Re: stuttering and dropped frames

I wonder why the 2nd number on the "frame rate" line is 59.595 hmm
In SVP's log there's a measured screen refresh rate - what is it?

Re: stuttering and dropped frames

"I wonder why the 2nd number on the "frame rate" line is 59.595"
I don't know, but the 2nd number constantly and rapidly changing between ~59-60 during playback (on both machine), the 1st number does not change

"In SVP's log there's a measured screen refresh rate - what is it?"
in which log should I look?

Re: stuttering and dropped frames

there's only one log...

my idea is your Epson PJ for some reason has less-than 59.94 Hz refresh rate (59.59 ?), thus you have frame drops playing 59.94 content
what if connect new PC to the old DELL monitor?

5 Reply by 28adam28 (edited by 28adam28 10-06-2025 20:52:20)

Re: stuttering and dropped frames

"there's only one log..."
Then I'm looking at the wrong folder...  There are 7 files in this directory: "c:\Users\Film\AppData\Roaming\SVP4\logs\"
But I found an event log on the SVP manager UI - is that it?

"my idea is your Epson PJ for some reason has less-than 59.94 Hz refresh rate (59.59 ?), thus you have frame drops playing 59.94 content"
That would be pretty ugly... (but it is possible of course) and as I said before that number changing during playback. I attached two picture. HTPC above 60 and Mainpc below 60.

"what if connect new PC to the old DELL monitor?"
Some progress...
I connected the Dell monitor to the new PC and voila... ZERO frame drops (picture attached)

Okay, Okay... so... the new PC is good. This is good news. It seems the problem is the Epson Projector (or maybe the HDMI cable???) . This is is not good news for me because this projector is also new, I bought it few month ago and it wasn't cheap. Btw it is an Epson TW7100 if it helps...

So my question is how can i achieve fluid playback with this projector? Are there any SVP or MPC settings worth trying? Or what should I change? New projector is not an option smile

Post's attachments

htpc_above_60frame.jpg, 130.15 kb, 738 x 456
htpc_above_60frame.jpg 130.15 kb, 6 downloads since 2025-06-10 

htpc_dell_monitor.jpg, 98.77 kb, 741 x 457
htpc_dell_monitor.jpg 98.77 kb, 6 downloads since 2025-06-10 

mainpc_below_60frame.jpg, 196.57 kb, 996 x 606
mainpc_below_60frame.jpg 196.57 kb, 5 downloads since 2025-06-10 

6 Reply by 28adam28 (edited by 28adam28 11-06-2025 08:55:30)

Re: stuttering and dropped frames

Two more things:

- I found the measured screen refresh rate in the log: 23:14:52.637: Screens: screen 1 - 1920x1080 @60.002 Hz [measured], x1.5 [95 DPI]
- I set the frame rate to 50 in SVP (this is lower than the projector frame rate), but it doesn't help. There are also dropped frames and it does not look fluid. So 50 frame is not good, not fluid enough and it doesn't resolve the dropped frame problem.

Post's attachments

htpc_50fps.jpg, 114.1 kb, 736 x 424
htpc_50fps.jpg 114.1 kb, 6 downloads since 2025-06-11 

Re: stuttering and dropped frames

dunno... turn off 10-bit mode?

8 Reply by dawkinscm (edited by dawkinscm 11-06-2025 12:36:12)

Re: stuttering and dropped frames

Chainik wrote:

dunno... turn off 10-bit mode?

i did wonder about that when I saw the original post. But for mpv it doesn't make much of a difference and I would be surprised if it did for mpc. But I can't see anything else either so it's worth a try smile

Re: stuttering and dropped frames

8-bit does not help. (picture attached)

It was just ~3600 frame / 1 min and 14 dropped frame

Post's attachments

htpc_epson_8bit.jpg, 122.52 kb, 738 x 463
htpc_epson_8bit.jpg 122.52 kb, 6 downloads since 2025-06-11 

Re: stuttering and dropped frames

turn on "exclusive fullscreen"?

Re: stuttering and dropped frames

Chainik wrote:

turn on "exclusive fullscreen"?

nope sad

Post's attachments

htpc_fullscreen.jpg, 159.57 kb, 743 x 472
htpc_fullscreen.jpg 159.57 kb, 5 downloads since 2025-06-11 

Re: stuttering and dropped frames

I did more tests. The projector is connected to the computer with a 15 meter HDMI cable and I thought maybe that was too long. Took the pc out of its place and put it next to the projector. I replaced the cable with a 3 meter hdmi 2.1 cable but nothing changed. So it's not the cable. I put everything back in place with the long cable and I found something interesting. In the SVP / Application settings / GPU acceleration... It was "Using NVIDIA Geforce RTX 4060". I changed it to "no acceleration" and the frame drops disappeared. Now it is fluid and there is no dropped frames. I don't understand why... I thought the gpu acceleration was the better choice.

Re: stuttering and dropped frames

check PCI Express mode in NV control panel (system information)
there were several cases when PCi-E was at x1 mode for some reason

Re: stuttering and dropped frames

sorry for the language...

Post's attachments

nvidia.png, 47.12 kb, 826 x 769
nvidia.png 47.12 kb, 7 downloads since 2025-06-13