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Author Topic: YCC or RGB?  (Read 435 times)

JrPinto

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YCC or RGB?
« on: April 28, 2025, 09:16:13 am »

Hi, there!

What's the best option to set on graphic display software for JRVR: YCbCr ou RGB?

My TV is an LG OLED C3 and can handle both. But I'd like to set the graphic display the best way for JRVR.

Thanx in advance.
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Jappie

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Re: YCC or RGB?
« Reply #1 on: May 02, 2025, 01:37:24 pm »

Mister Pinto, I think I understand why nobody responds to your 'question'...
Do you know what YCC and RGB stand for? If you do then your question is not for this Forum. JRiver Media Center has NO options for YCC or RGB.
JRiver has a great Support Team, ready to help someone who is using Media Center and wants to get the most out of the software.
Maybe you can find answers on one of the forums of Avforums.com, maybe you could ask LG or the maker of your PC about YCC/RGB...
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TheShoe

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Re: YCC or RGB?
« Reply #2 on: May 03, 2025, 04:59:18 am »

I think the general consensus is to leave everything in RGB as that is the native color scheme for computers.  Since the processing chain for video can involve multiple steps, the idea is that you want to avoid conversion between YCbCr<->RGB as there is the potential depending on what is doing the conversion to lose precision.  It's like making successive copies of an analogue tape - every subsequent copy based on the last loses fidelity.

You have Windows, your video driver, Media Center, and your TV all involved in the chain to produce an image, and little insight (if any) at what exactly is taking place in the software as the video is processed along the way.  So best bet - leave it RGB.

Far more knowledgeable people can weight in here, but I think this topic - if you do some searching both here in the forum and elsewhere - will show many discussions that will drive you crazy, and has been beaten to death over the years.

For me, I run RGB/10bpc at 4K resolution on my LG OLED.  My video card is an nVidia 4090.



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JrPinto

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Re: YCC or RGB?
« Reply #3 on: May 03, 2025, 06:00:12 am »

TheShoe, that was the answer I was looking for.

All I want is to have the most direct signal directly from JRiver to my TV. IŽll set my display card to RGB 10 bits, so as you do.

Thanx a lot for your polite and helpful answer.
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Ashfall

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Re: YCC or RGB?
« Reply #4 on: May 03, 2025, 10:47:01 am »

I remember this coming up in the MadVR days and it was mentioned somewhere that MadVR immediately converts everything to RGB Full for all it's internal processing, so I've always kept the video drivers at RGB Full.  No idea if JRVR works the same way, but I've continued to use only RGB Full 10 bit and it looks great.
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Manfred

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Re: YCC or RGB?
« Reply #5 on: May 04, 2025, 05:38:53 am »

from madshi:
(*) https://forum.doom9.org/showthread.php?t=146228]https://forum.doom9.org/showthread.php?t=146228](*) https://forum.doom9.org/showthread.php?t=146228

Paragraph:
FAQ:A) Which output format (RGB vs YCbCr, 0-255 vs 16-235) should I activate in my GPU control panel?
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TheShoe

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Re: YCC or RGB?
« Reply #6 on: May 04, 2025, 11:21:38 am »

TheShoe, that was the answer I was looking for.

All I want is to have the most direct signal directly from JRiver to my TV. IŽll set my display card to RGB 10 bits, so as you do.

Thanx a lot for your polite and helpful answer.

You're welcome.

One thing to look out for - and you will notice it if you see it while watching familiar video - is in scenes with what is supposed to be pure black (RGB: 0, YCbCR: 16, on a scale of 0-255 where in 0-bit color 0 == "black" and "255" == "white"), if you see a weird sparkling effect, like very mild static noise in the black part of the image, something isn't set correctly.

It's lost to time for me how I solved this as I've upgraded components over time and both the hardware and software (and HDMI cables, now that we have high-bandwidth needs) have improved so much.  But I stand by my recommendation - RGB throughout the chain to my aging eyes produces the best results.

I don't think you'll see this effect - it's something "resolved" years ago.  Just pointing it out.  For me, my "test movie" was Labyrinth (4K UHD).  In the opening credits when the CGI generated Owl is flying around, the background is and should be pure black.  Back then (years ago), I saw the sparkles and it drove me crazy.  Now I also noticed this in gaming as at the time I had one PC and it pulled double-duty: Home Theater (Media Center), and Gaming.  In games like Horizon Zero Dawn, I saw same effect.  In the end, IIRC, I set everything to RGB and it resolved.  With older OLED then (the final 3D Capable 2016 LG curved display), as today, there are input settings for various modes: Movie, Game, etc.. which also have an effect as they enable/disable various settings.  It's amazing rats nest of options and I spent countless hours trying to find the optimal.

At some point I was able to afford and build a separate gaming rig, put an HD Fury in-line, put video output directly to my OLED C1 for  dynamic refresh rates, split the audio off to a proper processor (ARC over HDMI is just a poorly supported option) and dial in everything to where I need it.  My only validation that it was time well spent is that both my children and my wife watch movies and listen to music (external DAC from Media Center) and they comment on how incredible the difference is!  Validation.  At a cost (time, money, time==money?).  Now, I just leave well enough alone.  JRVR is awesome - it solved for me at least my obsession for MadVR which went mostly private, and that's fine - that guy is  genius.  But so is Hendrik, and having him part of JRiver means we all benefit :)

Sorry - long winded post.  Media Center beats *any* STB like implementation for Video (if anyone wants a Dune 4K Max Vision, lightly used, DM me), and destroys any STB for Audio by orders of magnitude.

Happy watching! (and listening)


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