2012-02-07, 20:21
meridius Wrote:Why do you have both
Adjust refresh rate to match Video
And
Sync playback to display.
Surely u would only use one or the other ?
I have adjust refresh rate to match video as I use 24p but don't have sync playback to display
U would use sync playback to display if u had 24p source and the tv was in 60hz and it would sync it to that refresh
Or am I totaly wrong here and could I or anyone explain
Cheers
The primary reason for using sync to display is when the video card you have (which, by the way is all of them) is unable to sync completely with the TV refresh rate.
Let's say that your video card can only do 23.980 and your TV supports 23.976. If you do not use the sync to display option, then your video card will see that the media is 23.976, and try to output that to the video card, which can't really do 23.976 and the result is dropped frames to the display.
If you choose sync to display, then XBMC sees that the TV is clocked in at 23976 and it tries to adjust the output based on the actual video card frequency to smooth out or minimize frame drops between the source, video card, and display.