More > JRiver Media Center 31 for Windows
Pauses in Audio and Video
htnut:
--- Quote from: SimplySound on December 12, 2023, 09:26:36 am ---
So HTNut, I am going to suggest you load up LatencyMon from Resplendence and post what you are seeing for latency. I'm fairly confident there isn't an issue in MC that impacts audio. Audio synched to Video, perhaps. But I believe you should start with assessing your latency and see what that looks like. There are many on here that can help you with tweeking if you find your system isn't responding properly.
Here's the link:
https://www.resplendence.com/latencymon
--- End quote ---
Thank you very much for directing me to this tool. It's very interesting.
I loaded it up and watched a movie last night, but it was completely stable when the audio would dropout every ~ 20 minutes. Here's a screenshot (sorry it's a lousy iphone photo, I was tired and lazy). This was taken just a minute after the dropout occurred, and the "current" readings didn't change during the dropout (I think the highest occurred as the move loaded and began playing)
It says:
Was running for 24 minutes
"system appears suitable"
"current" Interrupt to process 152.6
"highest" " " 932.4
Highest ISR 74.08
Highest DPC 644.07
pagefault count: 4950
SimplySound:
Well HTNut, your latency doesn't look that bad. Not as responsive as I have configured at this point, but I've done a ton of tweeking and yours seems fine. The only thing I scratch my head about a bit is it looks like the Kernel Framework Driver is listed for ISR & DPC, but I'm not sure that's a real issue.
So your drop out lasts for how long? A second or two, or longer?
htnut:
Dropouts are just one second, maybe less than one second. Sometimes accompanied by a slight visual glitch(maybe a single dropped frame) but not always.
Other than these ~every 20 minute dropouts, I don't have any dropped or repeated frames. Playback is perfect otherwise.
SimplySound:
Ok, this definitly sounds like a latency issue in processing. So, let's start with your CPU Core setup and we'll start in the BIOS. Make sure the following is set in the BIOS, reboot and then do another LatencyMon session and report back.
* Disable anything that has to do with virtualization. Virtualization has made it into client OS’s for development and also to support VDI, but it has no place on an Audio Visual Platform.
So, be sure to disable Intel Virtualization support including Intel VT-D within the BIOS.
* Also disable Hyper-threading, your CPU cores should only be processing a single thread and shouldn’t be ‘switching’ to attempt multi-processing.
* I disabled Intel Speed Shift Technology to allow the OS to control P-States. And I also disabled Intel Turbo-Boost Technology so that the CPU maintains its frequency of processing. My position is that you want a very stable platform for processing a digital stream and don’t want the CPU cores to fluctuate with power/speed.
* The final piece of the puzzle in the BIOS for me was to disable the C-States so that the CPU cannot control any of the core power settings.
Let us know what you find out.
SimplySound:
One other question for you HTNut, I assume your interface is via HDMI exclusively (not S/PDIF)? HDMI carries both Audio and Video signal and is responsible for maintaining the synch. It would make sense that when you have an audio drop you have a video stutter.
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