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2014-04-12, 16:17
(This post was last modified: 2014-04-12, 16:19 by Simkin84.)
I have turned on "Adjust display refresh rate to match video" and its working perfect on 23.976fps movies on my 24p Panasonic Plasma TV. it runs very smooth.
However. on 25.000FPS content, XBMC set my TV to 50Hz, and the result is not so good. I get alot of unsmooth movement or lag, and its a bit annoying.
If i run the same content in VLC, and my TV set to 60Hz, its alot smoother.
Is there anything i can do to prevent XBMC setting my TV to 50Hz on 25.000FPS content and still have it to set my tv to 24p on 23.976 movies?
Thanks!
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un1versal
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Have a look at <adjustrefreshrate> in advancedsettings.xml
http://wiki.xbmc.org/?title=Advancedsettings.xml#video (wiki)
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negge
yo guysv7may bd latr tomorroe
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Why would you want to use 60Hz for 25 fps content? If it doesn't work for some reason you should investigate that. Have you checked that the TV actually switches to 50 Hz and not something else?
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noggin
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2014-04-13, 01:40
(This post was last modified: 2014-04-13, 01:42 by noggin.)
Watching 25Hz content at 60Hz is a real mistake. You will get nasty frame repetition to get from 25 to 60 which will mangle linear motion and make it juddery. (50Hz content at 60Hz is even worse - you get 10Hz motion judder on linear motion - it's unwatchable)
If you are getting nasty judder with 25Hz content played back at 50Hz then something else is wrong. All European broadcast TV is 50Hz, and movies, TV drama (and many documentaries) are shot 25p and broadcast at 50Hz using 2:2 repeition/pulldown. Movies (and US shows) that are shot 24p are sped up to 25p and then broadcast at 50p or 50i (depends on your broadcaster)
If you're seeing "lag" (whatever that is) then there is a problem somewhere. Does your TV have any frame interpolation? (Natural Motion, Motion Flow etc.?) These can go badly wrong in some cases.
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2014-04-13, 15:41
(This post was last modified: 2014-04-13, 15:43 by Simkin84.)
The tv has "Intelligent Frame Creation" or "24p Smooth Film" as it is called when watching 24p content.
I know the recommendation is to turn things like this off, but i prefer to have mine set to Medium, as i like the fluid motion it creates watching movies.
Watching TV broadcast is not any issue, and it is 50Hz with no lag or juddering at all. Neither is watching NHL on PS3.
But watching Air Crash Investigation ripped from National Geographic makes things stuttery and laggy, i dont know why. The tv is switched to 50Hz so thats not the problem. After i forced the tv to 60Hz its not perfect but much better than 50Hz.. I have not watched any other 25p content yet.
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un1versal
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idk what OS you have, but depeding on the modelines your tv oututs you may actually need to tweak them and have specific modes for each fps, in Linux this is relatively simple to achieve.
If Linux you can look at Debug log and xandr outputs etc and tweak xorg.conf and add correct modelines.
This is possible also with nvidia gpus anything else is a unknown process.
See
Configuring_resolution_via_xorg.conf (wiki) to get you some ideas.
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negge
yo guysv7may bd latr tomorroe
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I suggest you try with a different file and make sure your TV really switches to the correct framerate (usually you'll see it if you press the "info" button on your TV's remote).