2015-09-12, 15:39
(2015-09-12, 15:25)hdmkv Wrote: In any case, PQ is smooth with perfect framerate with just "Adjust display refresh rate to match video" enabled, but odd why "Sync playback to display" causes no signal issues. Don't fully understand the benefits of having it enabled, but reading this, it sounds like a 'nice to have' as it appears to alter the speed of the video playback to better match the capabilities of the display in question. But, if you have a capable display, not necessary, at least how I understand it.
The real benefit of "Sync Playback to Display" is if you have player hardware that doesn't cope with 23.976 or 59.94Hz and only copes with 24.000 or 60.00Hz output. Normally you would end up with a repeated frame every 40" or so - creating a stutter (for 23.976 at 24.000). But if you enable "Sync Playback to Display" then rather than duping a frame to keep things in sync, it resamples or drop/dupes audio frames to keep things in sync, and you don't get the the visual disturbance of a repeated frame.
However the PI / Pi 2 are capable of high quality 23.976/24.000Hz output - so you shouldn't need "Sync Playback to Display" to work around this.
It can also be useful if you live in 50Hz-land (Europe, Aus, NZ, large parts of Asia) and have 23.976/24.000Hz content but don't have a "24p" friendly display and would have to watch this content at 59.94 or 60.00Hz with 3:2 pulldown. Rather than doing that it is possible to watch this content at 25.000Hz with speed-up (as it would be shown on TV) and with 2:2 pulldown for smoother playback than 3:2 would offer.
(However Kodi doesn't, AFAIK, do pitch correction as broadcasters usually do with their speed up from 23.976 to 25.000Hz)
