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[alb]

I know about the ability to have MC auto adjust the displays refresh rate to match content refresh rate.  That is great!  However, my HTPC is connected to 4K Sony XBR 850D.  I keep the desktop settings at 1920x1080@60Hz, but often play movies that are 23.976 fps or 24 fps.  Some of those movies are plain ole' Blu Ray 1920x1080 resolution while some of the movies are the new hotness of 3840x2160.

Right now, I have JRiver set to automatically switch all 23.976 fps and 24 fps movies to 3840x2160 so it will accomodate my 4K/UHD movies.  The upscaler allows the 1920x1080 movies to look okay, but I'm curious why JRiver can't look at the Media Info of the movie, see what the resolution is and then adjust accordingly.

Sidenote:
My biggest gripe about playing 3840x2160 movies is how incredibly small the info/seek/rewind bar becomes.  God forbid I have to right-click to access the Subtitles menu or something.  I need the Hubble Telescope to perform those functions!    Is there any way to have that object adjust/compensate for the 4K/UHD resolution?  Is that something I'd have to manually adjust each time I decide to play a UHD film?  If so, how.  NASA wants their telescope back.

Thanks!

[RoderickGI]

Fix the last issue and the earlier ones are easier to fix.

Set your Windows Desktop to 4K (3840x2160), set Windows Displays Settings Scale and Layout to 200% to make everything large enough to use when in 4K mode, which is now always.
Set the MC Automatic Display Mode Settings to Custom, set the resolution to 4K, and just have the fps change as required.

There are several threads that discuss how best to do this. Some cover 3D as well, where MC must switch to 1920x1080 to work. There are nVidia and madVR settings required for 3D. Have a search around.

https://yabb.jriver.com/interact/index.php/topic,113893.msg787172.html#top
https://yabb.jriver.com/interact/index.php/topic,116474.msg805022.html#msg805022
https://yabb.jriver.com/interact/index.php/topic,116472.msg805017.html#msg805017

[jmone]

Also you don't mention what GPU you are using but if it is decent enough the RedOctober HQ (madVR) will perform the scaling of your 1080p --> 2160p and it will likely be better than what your PJ can do.  This is how I output to both a JVC x7500 and a OLED 4K LG TV.