[wolfn]

Hi,
after some days of testing & googling I hope for some help here:

I'm running a Pi-B+ with Openelec 4.0.7 + Gotham 13.1 on a Class-10 Sandisk SD (All 'Bells & whistles' switched off, skin is quartz).
Tried a separate usb-pendrive for storage but this made no difference for me.

The problem is:
Some of my videos are in 1080p50 with bitrates up to 60Mbit/s (mkv, High profile AVC), coming from my Syno-NAS via wired GBit.
Playing them with my old WDTVlive gives no problems at all (has a 100-ether-plug, too).
But the Pi starts stuttering at the critical sequences.
With debug on I can see, cpu load is high, but not 100%. Other sequences with longer 100%-situation bring no stuttering!
But - if such stuttering occurs - the left memory-indicator (I think freemem) is heavy running down (seems to me like buffer filling) and then the video stops or stutters.
I played around with readbufferfactor & cachemembuffersize but without real success. I still had more than 100MB free, even with 50MB cache and factor 3.

One fact is really clear: playing per UPnP brings most problems, via nfs only a few (but too much) and playing directly from pendrive is best, but not 100% ok.
But I need to play this all from the nas.

Just tried the new 4.1.3 + 13.2 (beta) with nearly the same result.
If further info is needed, let me know.
wolfn

[popcornmix]

The Pi is designed for Blu-Ray (1080p24 with 40Mb/s video) and camcorder footage (1080p30 typically less than 40Mb/s), so you are pushing beyond that.
It is probably possible to play these clips, but you'll probably need overclock and will need a good network (or USB disk) connection.

If you upload a sample file then others (including me) can confirm if the file is playable in their setups and we can work out where the bottleneck is.

Firstly start with a fast USB stick to rule out the network and concentrate on getting that playing smoothly.
Only when that is playing smoothly is it worth testing through the network.

[wolfn]

Thanks for your reply!

Ok, will prepare a snippet and post the link here.

I will check it before uploading (the length needed).
Seems to me, there is some 'buffer exhaust' needed to bring up the problem.

But as already stated: usb works best, the last used pendrive just tested: >13MByte/s read, thats twice the bitrate needed plus buffering, has still some stutter.

wolfn

Edit: Overclocking is already on: 900 | 333 | 450 | 2 but cpu doesn't reach 100%!

Edit2: My audio-settings are pass-though & 'fast'. I used the wiki-page but I'm unsure if its all ok. Any pitfalls?

[wolfn]

Hi,
upload just completed. You will find 2 testfiles here: ftp://ftp.snafu.de/pub/transfer/xbmctest/
The second one has more problems, just from my pendrive.
Tried overclocking = high (950) but is doesn't solve anything. Only difference I found is freemem now goes a bit below 100MB.
(Divided Memory 256/256)

I suspect a problem with buffer-handling, if I read some other posts http://forum.xbmc.org/showthread.php?tid=201797
and my own about slideshows via UPnP http://forum.xbmc.org/showthread.php?tid=201974.

No doubt, the Pi is running near its limit, but my hope was the B+ will handle this better...
My old WDTVlive -as far as I know- is running a similar (slower) processor and can really handle this stuff
(http://www.legitreviews.com/western-digi...yer_1118/2).
And I wish to retire this box...

Edit: pls correct the link to the files, seems the board-system manipulates this: "ftp://ftp.snafu.de/pub/transfer/xbmctest/"