Devices > Video Cards, Monitors, Televisions, and Projectors
Assistance with Smooth Video Project?
cowboydude99:
I have an Apple TV to test with.
I tried other media centers, none compare to JR.
I may also try out another PJ and see if that helps. There are some Epson factory refurbs for a reasonable price, along with the BenQ 3550.
JimH:
--- Quote from: Hilton on April 12, 2020, 11:09:26 am ---I have a couple of Nvidia Shields that work really well as rendering devices but unfortunately that means not using JRiver or madvr features.
The Shields support atmos, HDR and dolby vision.
https://www.nvidia.com/en-us/shield/shield-tv-pro/
--- End quote ---
I think you know that JRiver for Android runs on the Nvidia Shield.
tij:
--- Quote from: cowboydude99 on April 12, 2020, 01:43:54 pm ---I have an Apple TV to test with.
I tried other media centers, none compare to JR.
I may also try out another PJ and see if that helps. There are some Epson factory refurbs for a reasonable price, along with the BenQ 3550.
--- End quote ---
Try turning e-shift off and run projector at native resolution ... maybe that will help ... just shooting blindly here
wer:
The JVC LX-UH1/B is manufactured by BenQ, and is a rebadged BenQ HT5550. This is a DLP projector that uses a 1920x1080 DMD and TI's "XPR" technology to pixel-shift the DMD to produce 3840x2160 images (across the time domain). Because each time-pixel is individually addressable, TI claims it meets the definition for 4k.
When the .47in DMDs used in the LX-UH1/HT5500 were first produced, the DMD could only run at 120Hz internally, one 60Hz cycle for each end of the XPR pixel-shift cycle. Because of this, all projectors using the device might accept any input refresh rate, but they were all converted internally to 120Hz for processing by the DMD. A 24p or 23.976Hz signal cannot be run at 120Hz without stuttering.
Some time later, TI released new engineering software that allowed the DMD to run at 96/48Hz (if the mechanics for the color wheel allowed it). By leveraging this new refresh rate, stutter-free playback of 24p sources was possible. It was left to the OEMs as to how and whether to implement this or not.
So the point is, although the projector may accept any input refresh rate you like, and therefore claim to be running at that rate, the DMD assembly that is actually producing the image may not necessarily be running at that same rate. There could be internal conversion going on, as there was in all the early projectors based on this chip.
JVC and BenQ don't have much to say about this issue.
Short of getting a statement from someone in BenQ or JVC engineering, perhaps the only way to be sure as to the output capability of your projector is to measure the light output with an oscilloscope. Alternatively, you could try filming it with your iphone with the iphone recording frame rate set to 240Hz, and then you could count how often the image blinks and calculate the output refresh rate that way, although doing that successfully is harder than it sounds.
Cowboy, I suggest instead of testing with another projector (many of which have this issue) test first with an actual television, something you can verify supports the 23.976Hz refresh rate. Get your PC and MadVR configuration working correctly with that. Then, take that working config and hook it up to a projector.
Good luck...
cowboydude99:
I have an old Sony xbr9 sitting around. Do you know if this suitable? Should I disable all motion flow options for the testing?
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