QUOTE(tharmaraj @ Jul 22 2015, 09:59 PM)
Hello Chief - is it possible to give us more information on the following?
You need to check the Video Acceleration settings, also under Video->Playback->Adjust display refresh rate to match video... change that to "Off" and Video->Playback->Sync playback to display to "On" or "check"
1. What setting you recommend for OpenElec?
2. If we to change as the above recommendation, does it affect the sound system via AVR?
Thanks again for your advice
ciao!
I won't suggest to play with "Adjust display refresh rate" setting first, keep it to "off", only change "Sync Playback" to "On" / "Check", this also if you feel/face stuttering issue, I have "Sync Playback" to "On" on my FireTV and other devices cuz on my FireTV i was experiencing stuttering but this doesn't effect my Audio Passthrough and there's no sync problem i'm facing.
You need to check and confirm your TV supported Hz and also your AVR supported Hz, only then play with "Adjust display refresh" settings.
For further explanation read below.
"Adjust Display Refresh Rate" will switch the output refresh rate when playing back a file to the best refresh rate that is supported by the display AND the hardware Kodi is running on (as reported by EDID) If you don't select this option then you output at a fixed display refresh rate, which is usually set in Settings->System->Video Output. This setting allows Kodi to change the frame rate of the video output fed to the display, to ensure the best refresh rate is selected.
So if you have a display that supports 50Hz and 60Hz content, 50Hz content will be output at 50Hz and 60Hz content at 60Hz, however 24Hz will be output at 60Hz with 3:2 (ignoring 1000/1001 refresh rates (*))
If you have a display that supports 24Hz, 50Hz and 60Hz content, then 24Hz will be output at 24H, 50Hz at 50Hz and 60Hz at 60Hz. This is great if you have a display and hardware that copes with everything flawlessly.
"Sync Playback to Display" is different. It alters the playback speed so that it matches the display refresh rate (which could be fixed or could be variable if you have also selected Adjust Display Refresh Rate)
Why is this useful?
Say you have a 50Hz display but 24p content. 24p content will look horrible if you play at 50Hz, but if you Sync Playback to Display it will play the 24Hz back at 25Hz which will look much nicer at 50Hz. (Even if you have a display that syncs to 60Hz and could watch 24p material with 3:2 - which is nicer - you may still chose to watch at 50Hz with speed up and 2:2 to avoid the 3:2 judder. I sometimes do.)
Also - if you have a Kodi platform that can't cope with 23.976Hz output, but it can cope with 24.000Hz, you would normally get a repeated frame every 40" or so to keep stuff in sync. However if you also select Sync Playback to Display then Kodi will slow speed up the 23.976Hz content to 24.000Hz - so no repeated frames (and thus no stutter) but you then have to sort the audio sync out (either by resampling or by dupe/dropping)