Devices > Video Cards, Monitors, Televisions, and Projectors
Video is window boxed on my new projector
wer:
--- Quote from: curiousMonkey on September 25, 2020, 08:30:00 am ---I did the experiments without MC loaded and the window boxing still occurs.
Whenever the frame is lower the 50Hz, I see it with the desktop.
I tested my bluray player earlier and it definitely works fine at 24Hz with 4K discs.
The issue must be either the integrated video or its interaction with the projector.
So I have to stick to 59 or 60Hz unless I update the video adapter.
--- End quote ---
So the problem is with the settings in your graphics driver, or your projector, not with MC/MadVR.
Replacing your graphics card should not be necessary.
Your projector is capable of projecting an alignment pattern, and has zoom and aspect ratio controls. I suggest you try using those.
Please read pages 24-26 and 56 of your manual. There is a diagram on page 27 of your manual that implies what you are seeing is normal behavior for the projector when fed a 1920x1080 image. You should call JVC tech support and get a better understanding of the projector.
If the boxing behavior of the projector with 1920x1080 material cannot be fixed, you could try outputting from the PC at 4k resolution. If your current graphics card can't do this, that would be the only reason you'd have to replace your card. Of course, then there would also be the concern of is your PC fast enough to do the upscaling.
Start by calling JVC. I'm glad I was able to get you on the right track at least... Good luck.
tij:
Respect to wer for finding time to read manual :)
curiousMonkey screen looks like cinemascope... so definitely he tweak some preset for zoom on the projector :)
JimH:
Thanks, wer.
curiousMonkey:
I started collecting more data after sending an email to JVC about this issue. I am using a Panamorph DCR lens on the projector in anamorphic C mode but aspect is set to Auto.
I noticed that when I set the video resolution for the PC to 4096x2160 everything worked as expected, there was no window boxing. Unfortunately that video mode does not support 50Hz or higher so watching NTSC broadcasts might be difficult.
Next I ran the Intel driver update and found a newer version of the Intel video driver for the 4400 GPU on my system. With that driver installed I am not seeing window boxing at frame rates below 50Hz. Unfortunately the window boxing does appear on my projector again.
I checked the info screen on the projector and there is definitely something happening there.
1) With the display driver at 1920x1080 and 60Hz, the projector reports the input signal is 1080 60Hz.
2) With the display driver at 1920x1080 and 24Hz, the projector reports the input signal is 2160 24Hz.
So I am back to running at 1920x1080/60 while I wait to talk to JVC.
wer:
--- Quote from: curiousMonkey on September 26, 2020, 05:40:18 pm ---I noticed that when I set the video resolution for the PC to 4096x2160 everything worked as expected, there was no window boxing. Unfortunately that video mode does not support 50Hz or higher so watching NTSC broadcasts might be difficult.
--- End quote ---
Both that graphics chipset and that projector support 4k60p. (both 4096x2160 and 3840x2160)
If you can't select 60Hz at all in the graphics driver, make sure you are using a high-speed HDMI 2.0 cable. You might have to get a better cable. Intel has a tech note on this:
https://www.intel.com/content/www/us/en/support/articles/000023945/graphics.html
A note on resolution:
The correct resolution for outputting your content is 3840x2160. This is what the video industry usually means by "4k". It is the resolution of UHD discs, and exactly double the horizontal resolution of HD, Bluray, and HDTV. 3840x2160 will allow you to display your content without distortion. This is the 16:9 aspect ratio, and any TV that says it's "4k" is 3840x2160.
However, your projector is using true 4k chips (also called DCI-4K or Cinema 4k), at 4096x2160. Unless the projector scales to distort (widen) the input image (or zoom it, cropping off the top and bottom edges), there will always be 128 pixels on either side of the display that have no image, because the chip is 256 pixels wider than the video image you are sending it. Your content is 16:9, and your projector is a bit wider than 17:9.
So that boxing may be unavoidable on that projector when displaying HD or UHD content. If you don't like that, or don't want to mask off that area of your screen, then you should have bought a different projector with a native resolution of 3840x2160. Or a narrower screen.
Good luck...
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