nVidia GTX series cards and 23.976p - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 8 Old 02-03-2020, 02:39 PM - Thread Starter
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nVidia GTX series cards and 23.976p

I'm thinking about using a tower with a nVidia graphics cards, like the GTX-1050. What I want to possibly do is feed the HDMI out to a Denon AVR and that to a BenQ TK850 projector.

The plot being that I'd like to use VLC to play MKV, and/or TS, files to the projector, which handles 24p natively. Does anyone know if the nVidia drivers allow the HDMI refresh rate to be set to 24p (23.976)? I do not care if the box stays at 24p, even for computer stuff, since the computer stuff will be minimal (other computers handle the computer stuff). Or, am I stuff with 60p refresh rate?

It is a spare Win7 tower, so I won't be forking out money to put together a new box to do this, other than a newer graphics card to handle 4K resolution.

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post #2 of 8 Old 02-03-2020, 02:46 PM
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Quote:
Originally Posted by mrvideo View Post
I'm thinking about using a tower with a nVidia graphics cards, like the GTX-1050. What I want to possibly do is feed the HDMI out to a Denon AVR and that to a BenQ TK850 projector.

The plot being that I'd like to use VLC to play MKV, and/or TS, files to the projector, which handles 24p natively. Does anyone know if the nVidia drivers allow the HDMI refresh rate to be set to 24p (23.976)? I do not care if the box stays at 24p, even for computer stuff, since the computer stuff will be minimal (other computers handle the computer stuff). Or, am I stuff with 60p refresh rate?

It is a spare Win7 tower, so I won't be forking out money to put together a new box to do this, other than a newer graphics card to handle 4K resolution.
Yes, you can set nvidia to output 24.

I personally run all my movies through MPC-BE at 23, as 24 produces lip-syncing issues.

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post #3 of 8 Old 02-03-2020, 02:49 PM - Thread Starter
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Thanks, that was quick. That is good news. Any particular reason that you are using MPC-BE instead of VLC?
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post #4 of 8 Old 02-03-2020, 03:23 PM
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Originally Posted by mrvideo View Post
Thanks, that was quick. That is good news. Any particular reason that you are using MPC-BE instead of VLC?
Overall a much better player. Plus it allows you to use MadVR and other better filters. VLC is very limited and not open.

If you have a projector and a HTPC - you should be running MadVR (for any upscaling and HDR tonemapping) - and VLC just cant do that.
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post #5 of 8 Old 02-03-2020, 04:52 PM
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Can VLC player even do 23.976, 24, 30, 50? Isn't it stuck at 60 on the frame rate? This would introduce pull down with uncontrollable judder yet so many choose to use it. Maybe I'm mistaken...

HOW TO - Kodi 2D - 3D - UHD (4k) HDR Guide Internal & External Players
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GTX960 4GB / RGB Full 4:4:4 / 8bit Desktop mode =60Hz / 10/12bit Video mode = Matched Refresh rates IE 23,24,25,60Hz
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post #6 of 8 Old 02-03-2020, 07:06 PM - Thread Starter
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Originally Posted by tommarra View Post
Overall a much better player. Plus it allows you to use MadVR and other better filters. VLC is very limited and not open.
OK, I've installed both programs on a Win7 box that is only connected to a 60Hz monitor. The MadVR will end up not getting used as this box isn't connected to a projector.
Quote:
If you have a projector and a HTPC - you should be running MadVR (for any upscaling and HDR tonemapping) - and VLC just cant do that.
If any upscaling is done, it will be done via the projector. The projector is a 1080p/4k projector. It is not native true 4k. It does a special display technique with the native 1080p to achieve the 4k. My plans are not to let up convert 1080p material and leave it at 1080p.

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post #7 of 8 Old 02-03-2020, 07:11 PM - Thread Starter
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Quote:
Originally Posted by brazen1 View Post
Can VLC player even do 23.976, 24, 30, 50? Isn't it stuck at 60 on the frame rate? This would introduce pull down with uncontrollable judder yet so many choose to use it. Maybe I'm mistaken...
Currently, the VLC output on any of my computers only goes to a 60Hz monitor. When I play 23.976 video I do not get any judder. 1080i29.97 that has 3:2 pulldown does experience issues. When I was capturing 1080i59.94 video from satellite feeds, I always recoded the MPEG-2 to H.264 and did an inverse telecine to get back the original 23.976 frame rate. That has always played smoothly.

It will be months before I have anything set up to do things via the projector. I have lots of work ahead of me.

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post #8 of 8 Old 02-04-2020, 10:10 PM - Thread Starter
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I just played a video (23.976) via MPC-BE and it did not play smoothly on the nVidia GTX-730 card. It had judder and did not sync with the vertical refresh rate. During motion you can end up seeing the frame break up.

That said, VLC has the exact same issue. Things will probably be better when HDMI is used to display on the projector and the refresh rate set accordingly.

As a side note, on my XP-32 system, VLC plays video smoothly. It has a GT-240 nVidia card. One would think that a newer OS and nVidia card would play better, but it doesn't.

"VCR was in the closet. Still works. Can't get the clock to stop blinking, though."
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Last edited by mrvideo; 02-13-2020 at 03:04 PM.
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