120 hz massive judder

by DVAFP

I recently got a Sony Bravia kd55x900f or xf9005 ( https://www.rtings.com/tv/reviews/sony/x900f#comparison_1799 ) and I’m having some issues maybe someone could help me resolve.

I use it mostly as a pc monitor, using 1080p@120hz when watching videos that have 24 fps, I get massive judder. It’s fine when watching at a 60hz resolution. Also, watching videos that have 60 fps on a 120hz resolution it’s also fine.

Now, since 120 is a multiple of 24, there shouldn’t be any judder as I’ve read on the web. I don’t understand why I’m getting some much judder, it’s almost unwatchable. I’ve tried lots of different tv settings, motionflow doesn’t do much if anything in this situation.

Edit: after doing some research, I guess my problem is not juddering but stuttering

raptor75mlt

I'm not sure what you read, but doesn't matter if there is a multiple or not, from 120 to 24 there is a massive amount of frames that needs to be filled in so motionflow is just going to make it worse on unpredictable scene movements. There is nothing better than refresh rate switching for videos.

Also btw, if you're using it as a computer monitor in a Game setting, as you should, I think motionflow is completely disabled.

BiggussDikkuss

You need a device that does auto Frame Rate Matching (aka Refresh Switching) to switch a TV's refresh rate to match the Frame Per Seconds of the source video. Then you use a Cinema or Movie Mode on a TV and activate Motion Flow or similar.

The best media player for Frame Rate Matching - currently is the Apple TV 4K.