2011-09-01, 08:59
should i have "Sync playback to display" On or OFF ? or when do i need to use it ? thanks
Lister of Smeg Wrote:Depends on what you are trying to achieve.
The more useful option is 'Adjust display refresh rate to match video' which will change the refresh of your display to match the file you are trying to play (24hz, 50hz, 60hz). Ensure you have a display capable of 24p before using this one though.
'Sync display to playback' will sync the file to the refresh of your display. So basically the opposite.
spiff Wrote:those are in absolutely no way opposites, they can be used in combination with great success...
spiff Wrote:where did i say it's the same. not being the opposite, does not mean they are the same..
you can adjust the refresh rate AND then sync to the display. that's what i do.
evilnsyde, not entirely precise. if you sync to display and adjust framerate by doing it, the audio have to be adjusted in some way no matter. the 'a/v sync method' just lets you choose between different ways of doing this.
lash78 Wrote:sync to display is align the video to the vblank. It's useful especially if vertical sync is disabled, it's remove the tearing effect. I think that the sync to display is not good for 23.976 fps content, the missed vblank counter is increasing very fast. I noticed that something wrong with playback on xbmc (i using nighly builds). I get judders at random points. I cant get perfectly smooth playback on 23.976 hz, i tried every settings. When playing 25 fps content with 50Hz refresh, sometimes the playback is became choppy (very small jumps) at this time if i activate the osd or movie info, the playback will be normal again.
Other players are working fine.
sorry for my english
spiff Wrote:audio clock basically means drop audio, can in worst case lead to extreme stuttery audio. video clock (resample audio) resamples the audio to keep it in sync with the video (*slight* chipmunking can occur), drop/dupe will duplicate/drop an audio chunk if needed to keep in sync.
there's no absolute answer here, it's personal preferences, as well as hw differences...