madVR Options Explained

[mark0077]

Ah right ok great, thanks. I wonder is it something that's worth updating in the main page of this thread, to explain the behavior? I saw some forum members on avsforum creating profiles for this, eg if (HDR) BT2020 else REC709, but I guess thats not needed in many cases.

[huhn]

the profile is usually to use the nvidia only feature to report bt 2020.

but if that option is used it will also assume bt 2020.
this is only an issue for PJ.

[Asmodian]

Originally Posted by mark0077

I wonder is it something that's worth updating in the main page of this thread, to explain the behavior?

I updated the first post. Thank you!

[webbo]

Definitely need some advice here, please

Regarding setting up madVR correctly in the following environment :
-ISF calibrated LG G3 OLED (calibrated both for SDR / HDR)

Should madVR run like this =>
tone map HDR using pixel shaders + output in HDR - so TV switches to its HDR mode?

Or just use tone map HDR - so the TV remains in SDR mode, yet madVR does all the tonemapping

Posting two screenshots




Sorry if this is confusing, hope someone gets my point
Many thanks

[JaylumX]

Originally Posted by webbo

Definitely need some advice here, please

Regarding setting up madVR correctly in the following environment :
-ISF calibrated LG G3 OLED (calibrated both for SDR / HDR)

Should madVR run like this =>
tone map HDR using pixel shaders + output in HDR - so TV switches to its HDR mode?

Or just use tone map HDR - so the TV remains in SDR mode, yet madVR does all the tonemapping

Posting two screenshots

Sorry if this is confusing, hope someone gets my point
Many thanks

You may want the latter if you like HDR.

[Asmodian]

HDR really needs that peak brightness. I would put the TV into HDR mode for HDR content.

[jmonier]

Originally Posted by Asmodian

HDR really needs that peak brightness. I would put the TV into HDR mode for HDR content.

It's my understanding that earlier LG OLED's DID provide extra brightness for HDR. I don't know for sure about other brands, but I've always thought that they didn't. I seem to recall that madshi stated that this was the reason for that checkbox, although he seemed to be relying on reports from others.

I DO know that current LG OLED's (like my C3) no longer do this. I also know that that it has no effect on my JVC HDR projector (RS3000), although it doesn't seem to hurt. I leave it off.

I would be interested in any comments from others who have direct experience.

[huhn]

on a PJ outputting HDR as HDR is a waste of time.
just tone map it directly to SDR.

with a TV everything changes.
yes some TV can do high brightness in SDR or are even brighter in SDR then HDR in rare cases.
but that means you watch SDR at like 1500 nits that's gonna hurt.

according to rtings so not that trustworthy anymore... your C3 is dimmer in SDR then HDR by like 200 nits:
https://www.rtings.com/tv/reviews/lg/c3-oled

BTW. did they fix the PC mode chroma and it is back to 4:4:4 with newer OLED TVs? pretty sure Asmodian talk about this before could be compete BS i'm saying here.

[Asmodian]

Originally Posted by huhn

did they fix the PC mode chroma and it is back to 4:4:4 with newer OLED TVs?

SDR is 4:4:4 in PC mode on my C1. I don't have any LGs newer than that.

HDR tone mapping is noticeably worse in PC mode though, so for HDR I am not sure there is a good solution to preserve 4:4:4 (at least on my C1 I decided 4:2:2 was the less-bad tradeoff for HDR content).

[huhn]

so there is nothing like reconstruction going on in PC mode and 4:4:4.

my CX didn't care about the PC mode HDR issues when it was new.
i never use HDR anyway.