MKV stuttering with stable and 3.0a5

sfunk1x · Post by **sfunk1x** » Mon Sep 30, 2013 3:20 pm

Hey all -

I'm running into some significant issues getting MKV files to play without stuttering. I can play AVI and MP4 without those issues, but not MKV. I haven't tried ISO.

I have tried the machine in both a wireless and then wired configuration without any change. The system, ideally, would be wireless. This is a Core I5 2500k (IIRC) system with 16GB of ram, 6950 video card (not sure if that hardware gets used for video transcoding or not?), SSD (streaming from) and this is streaming to a PS3. I've forced the IP address of the machine, and whitelisted only the PS3, and that hasn't changed anything.

This seems to be a common problem, but no clear resolution. This occurs with both the stable (2.6.5?) release and the current 3.0a5 build. I'm running Ubuntu 13.04.

Thanks!

DeFlanko · Post by **DeFlanko** » Tue Oct 01, 2013 4:53 am

In Radeon cards is there a setting like Nvidia's CUDA?

if so then i assume the GPU for Transcoding check box would work...

sfunk1x · Post by **sfunk1x** » Tue Oct 01, 2013 10:46 am

GPU Acceleration is greyed out, as you can see in this screenshot. This is true for 2.6.5 as well as 3.0a5.

: Screenshot of GPU acceleration greyed out; gpu_greyedout.png (78.75 KiB) Viewed 9737 times

Optimus_prime · Post by **Optimus_prime** » Wed Oct 02, 2013 9:13 pm

The GPU acceleration is only a feature of Windows UMS i believe. I could be wrong but someone can correct me.

Post by **SubJunk** » Wed Oct 09, 2013 9:09 am

It is a common problem with no one fix because it can be caused by so many different things.
Since it happens for you with a wired connection too, it's probably not a connection problem. So the next thing I'd try is to check the buffer in the UMS Status tab while playing - is it full when it stutters?

BuffMcBigHuge · Post by **BuffMcBigHuge** » Tue Oct 15, 2013 4:46 am

I'm dealing with a similar issue, however I have found the cause to be a spike in data transfer bitrate.

I notice that certain MKV files spike during certain scenes. It does not necessarily mean that the scene should have such a high data rate.
Pressing 'select' on the PS3 controller displays the current stream speed. On average, my UMS settings over wireless lay around 3-12 Mbps, suitable for:

Computer > Wireless N > Router > Ethernet > PS3

: IMAG0406.jpg (307.16 KiB) Viewed 9559 times

For some reason, certain scenes spike to 40+... I really don't understand why.

: Capture.PNG (73.44 KiB) Viewed 9560 times

Post by **SubJunk** » Tue Oct 15, 2013 12:57 pm

Hi BuffMcBigHuge

I'll need a debug log to see why that's happening

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MKV stuttering with stable and 3.0a5

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Re: MKV stuttering with stable and 3.0a5