[fritsch]

Just did a quick test with a 24p file I know is in sync.

First, current settings:

System->Video Output:
True Fullscreen: Enabled
Vertical Blanc Sync: Disabled

Video->Playback:
Adjust display refreshrate to match video: Always (Pause 2,5sec)
Sync Playback to display: Enabled
AV Sync method: Audio Clock

Decoding method: Hardware
DXVA2: Enabled

With these exact settings and a freshly started XBMC (Jerky after 1+ day) I get perfect sync on 24p material.

If I change only Vertical Blanc Sync to: Enabled, I get about 200 +/- ms out of sync.


So for your requests:

(a)
vsync turned on, method video clock and resample audio.
Result: about 200ms out of sync

(b)
vsync enabled, "Adjust refreshrate to match video" disabled(!), Sync Playback to Display enabled with method video clock and resample audio
Result: Perfect sync, but more jerky playback because the output stays at 60hz.

And to confirm I changed everything back to the settings I used before testing (vSync disabled, passthrough enabled etc) without restarting XBMC and the playback is back in perfect sync.
Menu items etc gets jerky due to not syncing every frame, but playback @24p is perfect.

Screenshot from playback with my "original" settings: https://drive.google.com/file/d/0B-l40sD...sp=sharing
No drops etc...

Yeah that's expected, as I told you before. So - now where is the culprit? :-) vsync, e.g. video driver? AVR that introduces a lag?

@steelman1991: Nope that's not fully correct. He can have delay free playback with vsync enabled but not at 24p.

Thanks for providing that data - but sadly that's what I have expected before and also see with my very own hardware.

Edit: Something else here. Video / Audio is synced back if they go > 200 ms away of each other. So the question now is: where are 200 ms going when the internal watchdog never gets triggered and we think that everything is fine? <- that one needs to be answered. Last time I digged into it, I did not find anything and thought it's some hardware dependend thingy, e.g. TV says: "wait until we have 3 frames == 150 ms and then interpolate something over it to make the picture more brilliant and put it out" :-)