Devices > Video Cards, Monitors, Televisions, and Projectors
Assistance with Smooth Video Project?
wer:
Why?
24Hz is a film standard. You're not projecting a film in a movie theater. 23.976 is the standard used by Bluray. You're showing blurays. The bluray spec supports other resolutions and framerates, but you'll hardly ever see a movie that's not 23.976.
So any manufacturer or vendor that says 24Hz when they really mean 23.976 is just lazy or stupid. It's a mistake and a bad practice, because they are conflating two different framerates.
There's no 23.0Hz standard for video. The vendors that say 23 instead of 23.976 is just a bit of laziness, because they don't want to make the user interface element wide enough to accommodate the full number.
There is a similar issue with 29.97/30Hz and 59.94/60Hz which involve the NTSC video standards.
The bottom line is that if you playback video at a framerate different from the original, or that is not an integer multiple of the original, there will be problems. Close doesn't count. Exact=Perfect, Not-Exact=Frames must be skipped or duplicated, which means glitches.
Thinking that 24 is closer to 23.976 and is therefore better is an understandable beginner's mistake provoked by the bad behavior of vendors.
This is an issue going back decades. You can google it.
If you want your bluray content to play without issues, make sure your projector supports 23.976 or 23, make sure your video card lists 23.976 or 23 as a supported mode, and make sure you configure MC to switch to 23.976 when it starts playback.
cowboydude99:
Ahh! Ok. I will see if the PJ supports 23.976hz.
With madvr, I would allow switching to 23hz, not 23.976, right?
Thank you for the clarification!
tij:
--- Quote from: cowboydude99 on April 11, 2020, 08:28:09 pm ---Ahh! Ok. I will see if the PJ supports 23.976hz.
With madvr, I would allow switching to 23hz, not 23.976, right?
Thank you for the clarification!
--- End quote ---
That’s correct ... if both projector and GPU support 23.976 playback should be smooth (unless source is choppy ... there are technique to film at this frame rate to avoid stutters ... especially for panning shots ... if it was filmed badly ... little can be done)
If stutters still occur ... you might have set MadVR scaling way to high for what your system is capable ... and it drops frames (that’s why ask for MadVR OSD)
MadVR tone mapping for HDR is excellent ... especially for projectors
EDIT: in PC world 23 refers to 23.976 ... very confusing indeed
wer:
--- Quote from: cowboydude99 on April 11, 2020, 08:28:09 pm ---With madvr, I would allow switching to 23hz, not 23.976, right?
--- End quote ---
Not exactly.
If you have MadVR do the mode switching, you must match the framerate that your video card lists as an available video mode. So if your video card says 23, set MadVR to 23. If your video card says 23.976, set MadVR to 23.976.
In MadVR the mode would look like this: 1080p23 or 1080p23.976 or 2160p23 or 2160p23.976
but you must match the nomenclature used by your video card.
However, instead of letting MadVR handle the mode switching, it is usually better to let MC do it. This is in Options->Video->Display Settings->Display Settings automatic change mode: Custom
That generally behaves better when returning to the desktop or theater view after playback stops. Letting MC do the mode switching doesn't inhibit any of MadVR's other abilities.
Only tell one of the programs to mode switch. Either MadVR or MC, but not both.
Regarding frame drops if you're scaling at 2160p: if you have that problem, please start a new thread about it. That will help not confuse other people researching their issue. This thread is about matching framerates, not scaling performance.
cowboydude99:
I tried setting hz on my nvidia control panel to 23.
Madvr - switch to 2160p23 - still a stutter.
Changed madvr to switch to 2160p23.976, but not much better. I took a screenshot of the MadVR OSD.
What would you set it to? Frames aren't dropping or repeating.
https://drive.google.com/open?id=1AKTNPl4vfZTZCmmunhjTcdYYITkrGVso
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