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R-Pi + XBMC (Any flavour) + DTS = AR......RRG....GGG.....

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CaNsA
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Joined: 02 Jan 2008
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PostPosted: 18:47 - 08 Jan 2013    Post subject: R-Pi + XBMC (Any flavour) + DTS = AR......RRG....GGG..... Reply with quote
So what is the cause of this buffering issue?
It's not cpu usage as i pass the DTS decoding onto my a/v receiver.

I currently have the RP oc'd @
arm_freq=900
core_freq=300
gpu_freq=300
sdram_freq=444
over_voltage=2
disable_overscan=1
gpu_mem_512=256
force_turbo=1
disable_overscan=1

Any ideas?
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Neorion
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PostPosted: 10:14 - 09 Jan 2013    Post subject: Reply with quote
Whats the source file?
USB or Network?
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CaNsA
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PostPosted: 10:27 - 09 Jan 2013    Post subject: Reply with quote
Over network via samba.
apparently the overheads with smb are a killer and NFS is recommended but M$ thought it would be a good idea to not include a NFS server in W7 Sad
And trying to get a NFS server running is a ballache....
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Neorion
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PostPosted: 11:47 - 09 Jan 2013    Post subject: Reply with quote
ahh I see.

Have you tried putting one of the files on a USB drive to confirm it is the overhead?

NFS win 7

https://www.networkedmediatank.com/wiki/index.php/Hanewin_NFS_server

Are you using RaspBMC or Openelec?

I have run all manner of files from a firewire drive into my mac and installed Twonkymedia server to host it.

It also picks up the shares no issue. Had a couple of MKVs with some artifacts but they sorted themselves out.
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CaNsA
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PostPosted: 11:50 - 09 Jan 2013    Post subject: Reply with quote
Its the level of quality that is causing the issue i think.
https://pastebin.com/bZU3VR82

I'm using RaspBMC.

I'll look into hanewin.
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Kaneda
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Joined: 27 Feb 2012
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PostPosted: 12:22 - 09 Jan 2013    Post subject: Reply with quote
CaNsA wrote:
Complete name : I:\Films\Avatar.mkv
Format : Matroska
Format version : Version 2
File size : 24.1 GiB
Duration : 2h 58mn
Overall bit rate mode : Variable
Overall bit rate : 19.4 Mbps
Encoded date : UTC 2010-11-21 00:05:31
Writing application : mkvmerge v4.3.0 ('Escape from the Island') built on Sep 5 2010 10:30:51
Writing library : libebml v1.0.0 + libmatroska v1.0.0

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2h 58mn
Bit rate : 17.4 Mbps
Nominal bit rate : 15.2 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.351
Stream size : 21.7 GiB (90%)
Writing library : x264 core 107 r1766 f9f0035
Language : English

Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Format profile : MA / Core
Codec ID : A_DTS
Duration : 2h 58mn
Bit rate mode : Variable
Bit rate : 1 561 Kbps / 1 510 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossless / Lossy


Yeah, that's way way way too high, you could play that back in a small cinema! Just re-encode in 10-12Mbps VBR for video, and 192Kbps CBR per channel for audio. Should playback fine if the receiver is decoding.
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CaNsA
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PostPosted: 19:29 - 09 Jan 2013    Post subject: Reply with quote
I could re-encode it but that sort of defeats the purpose of "trying to get the r-pi to work with the film".

Semi sorted it though.
O/C'd the rpi to 1ghz (heatsinks were bought a few days ago)
Pissed about with haneWin NFS, and watch the entire film without a hitch. Very Happy

The next problem i have encountered is:-
I have my nas which shares folders over smb which I want to mount on the NFS server.
Thats fine, sorted, not a problem.

\\nipplebiscuits\xbmc\telly -public -name:telly

raspbmc sees the shares and the files, but wait 0kb for each file?
ffs
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Neorion
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PostPosted: 22:40 - 10 Jan 2013    Post subject: Reply with quote
Permissions?
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chrisw
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Joined: 24 Apr 2006
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PostPosted: 23:01 - 10 Jan 2013    Post subject: Reply with quote
You've also got to remember that the Pis NIC is really just a USB device, don't expect much from it.

Good info here
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CaNsA
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PostPosted: 07:10 - 11 Jan 2013    Post subject: Reply with quote
Neorion wrote:
Permissions?


I think it was a permissions thing, bloody NAS getting all cocked up with its-self.
Pull the files back to my pc, deleted from NAS, created new folders, copied files back over and TADA!

Everything works, no buffering, no stuttering just a nice decent movie without interruptions.
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Neorion
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PostPosted: 10:46 - 11 Jan 2013    Post subject: Reply with quote
HTH
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