[newphreak]

Please, can everybody keep discussions going in this thread instead:
http://forum.xbmc.org/showthread.php?tid=80247&page=37

And DDDamian, could you move these posts pretty please? I will update my first posts linking this thread and the bbc sync sample

[alfredo]

Xbmc Version: XBMC 11.0-HD-Audio Git:HD-audio-20120325 (Compiled: Mars 25 2012)
GFX Driver: Intel HD Graphics 4000, driver version 8.15.10.2712
Hardware:CPU Intel i5 3570K, 16GB RAM, Asus P8Z77-M motherboard
OS: Windows 7 64-bit Service Pack 1 build 7601
Speaker Connection: This is a tricky one , HTPC to Lumagen RadianceXS video processor via HDMI 1.4 and then there are 2 HDMI outputs:

• Output1: HDMI audio and video to receiver and then, from the receiver, only video to plasma TV using HDMI v1.1
  
• Output2: HDMI video only to front projector through 12Mt of HDMI-to-CAT7-to-HDMI-to-DVI
  

Receiver: Denon AVC-A11AXVA
TV Model: Panasonic TH-42PX60 plasma TV
Projector: Projectiondesign DLP front projector
XBMC Audio Configuration:

• Audio output: HDMI
  
• Speaker configuration: 7.1
  
• AC3 compatible receiver: Yes
  
• Receiver supports: DTS-ES
  
• Receiver gets other DTS formats: decoded (LPCM)
  
• Sound audio device: wasapi: LUMAGEN (High Definition Audio Device)

Results:
Audio offset @ 23.976hz: Delayed by 0.200sec
Audio offset @ 24hz: 0.000sec
Audio offset @ 50hz: 0.000sec
Audio offset @ 60hz: 0.000sec

[Skram0]

Xbmc-Version: XBMC 12.0 alpha7 Git:20121028_6d17467 (compiled: Oct 28 2012)
GFX Driver: ATI 12.6 (v8.98-120611a-142035c-ATI)
Hardware Configuration:
Intel Core i3 530 @2.93GHz
Total Mem: 1975MB Free: 1286MB
GPU: ATI Radeon HD 5670
Motherboard: ASRock H55M/USB3 R2.0
OS: Win 7 SP1 64-bit
Screen Res: [email protected] - Full Screen (47.62fps), After XBMC restart - Full Screen (59.94fps)
Speaker TV Conncection: TOSLink (optical audio) to receiver, receiver to left and right speakers
Receiver: Onkyo TX-SR600
TV Model: Panasonic TC-P50S2N

Results:
a) Audio offset @ 23.976hz: Delayed by: 0.188sec

b) Audio offset @ 24hz: 0.000sec

c)
IM - Audio offset @ 60hz: Delayed by: 0.188sec (while display was stuck at 47.62fps) (see below)
IM - Audio offset @ 60hz: 0.000sec (after XBMC restart then video refresh was @ 59.94fps) (see below)
ToS - Audio offset @ 60hz: 0.000sec

d) Audio offset @ 50hz: n/a (only NTSC video modes supported)

Audio Output: Optical/Coax
Speaker Config: 2.0
Boost Volume Level: no
Output Stereo to all speakers: no
AC3: no
DTS: no
AAC: no
LPCM: disabled
True HD: disabled
DTS-HD: disabled
Audio Output Device: Direct Sound: SPDIF-Realtek Digital Output
Passthrough Output Device: Direct Sound: SPDIF-Realtek Digital Output
Play GUI Sounds: Only When Playback Stopped

I found it odd while testing that one time the video refresh was stuck at 47.62fps while in the menu as seen when selecting System Info, the "Full Screen" data. I can even feel that the home screen menu was scrolling kind of jumpy left and right. After I closed XBMC and opened it again then it went back to 59.94fps refresh. I also found it odd that my diagnostic display says the W: fps bounces around 48fps. I guess that's 23.976 * 2.

[fritsch]

The 47.62 could also be the max throughput your 5670 can do when decoding via dxva2. Just try to disable it and run on the pure CPU - you will probably see a difference.

[jpsdr]

It's just a hunch, so it may lead to nothing, but...
I personnaly have no issue, so i can't test, but, for those who have issues, have you tested if disabling all DXVA stuff (both in decoding, rendering, etc...) solved/changed anything ? Of course, it makes sense only if CPU is powerfull enough to properly handle video decoding without issue.