why is this file causing problems?

[julius02]

hi guys. why is this one particular rip from a canadian blu-ray causing problems on xbian - it judders terribly and is not very smooth whatsoever. it is not randomly, it is constant from start to finish.
thanks

Format : Matroska
Format version : Version 4 / Version 2
File size : 11.0 GiB
Duration : 1h 25mn
Overall bit rate mode : Variable
Overall bit rate : 18.2 Mbps
Movie name : Halloween
Encoded date : UTC 2010-02-22 21:41:31
Writing application : mkvmerge v5.9.0 ('On The Loose') built on Dec 9 2012 15:37:01
Writing library : libebml v1.3.0 + libmatroska v1.4.0

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=3, N=24
Muxing mode : Header stripping
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 25mn
Bit rate mode : Variable
Bit rate : 17.4 Mbps
Maximum bit rate : 35.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : MBAFF
Bits/(Pixel*Frame) : 0.281
Stream size : 10.5 GiB (96%)
Language : English
Default : No
Forced : No
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Muxing mode : Header stripping
Codec ID : A_AC3
Duration : 1h 25mn
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 275 MiB (2%)
Title : 3/2+1
Language : English
Default : No
Forced : No

[raspberry_pd]

Can you log in to the console via SSH? If so, please run this:

Code:

/opt/vc/lib/tvservice -a

And see if you get a line returned that includes AC3.

In general with 1080 resolution files, the Raspi chokes on the HD audio, not the video. If your display or receiver supports AC3, XBMC will pass that audio to the display untouched and all should be well. If not, XBMC may be trying to decode the HD and then mix it down to 2 channels. The Raspi's CPU cannot cope with this. For more details, see this post of mine (under another identity):

http://www.raspberrypi.org/phpBB3/viewtopic.php?p=249621#p249621

Other possibilities could be a weak or under-powered WiFi setup. Are you using a wired or wireless connection? Or is the file being read off USB?

[julius02]

(14th Jan, 2013 05:15 PM)raspberry_pd Wrote:  Can you log in to the console via SSH? If so, please run this:

Code:

/opt/vc/lib/tvservice -a

And see if you get a line returned that includes AC3.

In general with 1080 resolution files, the Raspi chokes on the HD audio, not the video. If your display or receiver supports AC3, XBMC will pass that audio to the display untouched and all should be well. If not, XBMC may be trying to decode the HD and then mix it down to 2 channels. The Raspi's CPU cannot cope with this. For more details, see this post of mine (under another identity):

http://www.raspberrypi.org/phpBB3/viewtopic.php?p=249621#p249621

Other possibilities could be a weak or under-powered WiFi setup. Are you using a wired or wireless connection? Or is the file being read off USB?

Thanks for the reply. I can confirm its not the ac3 as I have other 1080 files with ac3 and dts that play perfectly. I am wondering if it is to do with the frame rate?
Playing these off hard drive connected directly to the pi - power supply is more than adequate 5V 2A
Thanks

[raspberry_pd]

(14th Jan, 2013 07:36 PM)julius02 Wrote:  Thanks for the reply. I can confirm its not the ac3 as I have other 1080 files with ac3 and dts that play perfectly. I am wondering if it is to do with the frame rate?
Playing these off hard drive connected directly to the pi - power supply is more than adequate 5V 2A
Thanks

Power supply does sound good and ruling out the network issue helps.

Re 'other files play fine', let's not get ahead of ourselves. What is your audio set up? Is the audio outputting through the display via HDMI? Or do you have a receiver?

Are you able to run the tvservice command? If so, what does it return?

I'm not trying to be obstructive or condescending, I just think it helps to have all the facts on the table.

[rikardo1979]

would you mind share a small sample of the file or whole file so I can test? Please send me the details over PM,dont post it here
-thx-