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Full Version: Some MP4 and WMV videos stutter in my XBMC
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I have two HTPC's running XBMC Frodo12.2 with skin AEON MQ5.Both are powerful and run the movies on large screens including Blu Ray ISO's. The data is supplied to both through a Netgear ReadyNAS unit. Both have powerful ATI Graphic cards. However on one I notice that all formats play fine and on the other some MP4 and WMV videos stutter whereas the rest play fine. Appreciate if anyone can throw some light on this.
This may not match your problem exactly, but I’ll past it anywayz.


I used to have these two problems.


1: Random audio/video stutter when watching a Blu-ray ISO, accompanied by a loud noise (bzzz-bzz-bzzz) that lasted 2-3 seconds and recurred frequently. How frequently, depends on the computers energy saving settings.

I solved it by turning of the timer that saves energy by stopping the hard drives from spinning. Apparently the stutter came from some type of electricity surge when the hard drives began to spin again. This probably happened after XBMC came to the end of the stored data in the RAM and needed to retrieve more data from the hard drive(?).

If you have Windows you should go to Start menu => Control panel => Hardware and Sound => Power Options => click on "Change plan settings" => click on "Change advanced power settings" => click on "Hard disk" => click on "Turn of hard disk after" => set it to "Never" => click "OK" at the bottom.


2: Buffering issues when watching a Blu-ray ISO from two of my hard drives, but not from my other hard drives. Eventually I realized that the buffering was due to the fact that these two hard drives where connected to a 4x PCI-E card http://www.asus.com/Motherboards/U3S6 that had two SATA 3 ports.

This card was supposed to speed things up, instead it did the opposite. I don't know why, but it was the cause of the buffering problem. I connected the hard drives to SATA 2.0 ports on the main motherboard and the buffering problem stopped.


This won't solve everyone's problems, but could be helpful in specific circumstances. I have reposted in different threads incase it could be useful to someone.


(W7, AMD Radeon HD 6450, Xonar Essence ST, Onkyo receiver, Sony projector, Eden and Transparency! 4.x)