[PROBLEM] Video Stutter

[mk01]

(2nd Oct, 2013 09:51 PM)nertskull Wrote:  

(2nd Oct, 2013 11:38 AM)mk01 Wrote:  and to clear my confusion now, with MB/s you mean MegaBits (Mb) per sec, not megabytes (MB/Mbyte), right? as RPI can hardly do over 15MB/s. 120MB would be quite much even for standard PC on 1Gbit network.

So I'm pretty sure its actually MB as in MegaByte. Here is the output from "dd"

Code:

xbian@xbian ~ $ dd if=/media/Aspartic_Acid/media/video/Movies/ProcessedBD/The_Lord_Of_The_Rings_The_Fellowship_Of_The_Ring_2001_extended_Disc_1.mkv of=/dev/null bs=1M cou
nt=150
150+0 records in
150+0 records out
157286400 bytes (157 MB) copied, 14.924 s, 10.5 MB/s

10.5 is ok and nice. but before you posted this:

nertskull Wrote:So that is interesting. With raspbmc doing the file transfer over NFS I ran a bunch of times and average about 120 MB/s.

that's why I was wondering. now with the two runs with dd and posting whole output it makes sense.

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(2nd Oct, 2013 09:51 PM)nertskull Wrote:  Which is interesting, because when I put it in, I know I put the NFS mount at the bottom. Don't know how it got moved to the top. I don't remember every getting back into the fstab since that first time.

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I'm wondering, does the pi cache a video locally? So even though I'm asking it to pull from the NFS, maybe its really pulling from a local cache to get that fast on raspbmc? Because I can't get my head around those numbers. The specification clearly say its 100Mb max. My dd command shows upwards of 800Mb. I don't get it.

xbian-update scripts is doing that reordering. I hope you don't mind. As using mountall and upstart the order actually does not matter there.

PI is not caching videos locally, even XBMC does not (version < 13). only in case of internet sources, there is cache in memory.

as you now specified that the 120MB/s was from raspbmc I remembered that yes, RaspBMC is caching NFS mounts locally - what is quite killing the SD cards but ok. Their choice.

Taking into account that you have higher NFS transfer speeds with XBian than with RaspBMC then there two options now. Your NAS is not providing sustainable speed over the period while watching movies - and that's why RaspBMC caching is helping there - or it's like Rikardo said.

How big are the BRRips you have? What is the video and audio nitrate?