HDR Darker on CoreELEC Odroid N2 than Internal Player

Hi all,

I purchased a CoreELEC version of the Odroid N2 a few months ago and generally been happy with it, I’ve had Pi’s of various versions before and have several years of experience in configuring forks of Kodi. However one things bugs me… when I play a 4K HDR video file on my N2 it is dimmer and less “contrasty” than if I play the same file through the internal player on the LG OLED TV I have. I also have no issues with 1080p video, or non-HDR 4K from the N2 (it plays the same brightness as the internal player) so its definitely a HDR issue. Its basically the same issue as here:


I’ve checked all my HDMI settings etc are correct and its starting to annoy me, I recently started playing 1080 only videos during the daytime with the blinds open as the dark scenes in the HDR files cannot really be seen.

Sam managed to get a fix by altering the master defaults if you read through the thread above, he set a “more realistic fallback” for the mapping, can you guys do the same? Thanks!

You can try nightly build if you use stable and check if you see difference

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maybe stupid but did you try the differents options in the corelec settings oncerning hdr, lg option?

Yes, tried all the settings. Summary:

1080P, Great, same as internal player or DNLA
4K non HDR, Great, same as internal player or DNLA
4K HDR, much darker compared to internal player or DNLA and colours do not pop.

Did you guys read the thread I provided? I really do think its the same issue.

Is anyone else able to test a 4K HDR file through CoreElec and then directly on their TV’s player to see if they get the sme problem? obviously it need so be ensured the picture settings are the same (most TV’s can save the same setting name as different per source)

Also just tried nightly, same issue.

My TV(Philips) internal player is a piece of crap, it´s not easy to compare.

Ive notice kind of similar, when playing 4K HDR on my Sony 4K tv internal player (using the same picture profile - Cinema Pro) vs N2 - colors are more vivid and contrast is better on internal player.
I end up using different picture profile (Cinema Home) and set it up to my like when using N2.

Yes, I’ve tested many times on my LG and I cannot see any difference.

Similar on my C9 OLED.

@gphome @altrey @grimgriefer
I sent you all a PM, please check it.

I have the same/a similar issue. expecially dark scenes look pretty bad (no contrast, like a cheap 720p stream), while bright scenes are at least decent.

Similar to Problems described here and here

I have a Grundig GOB 9990 OLED (lg 2017 panel)

I just tested an HDR file on my N2 vs my LG C9 internal player. I noticed no difference in brightness/darkness between the two.

However, I did notice there was a difference in the Picture Settings Menu between the two. The one difference that stood out… TruMotion. I am one who hates the soap opera effect (TruMotion on LG), so this is the first thing I always turn off. Yet, it was turned on for the internal LG player. This was the first time I tested the internal player, as CoreElec has been perfect for me.

So… while I didn’t sit there and compare every setting, there could possibly be more changes. This could very well be the culprit of why you are seeing differences. If N2 is set to play in Cinema Home, while the Internal LG Player is doing it in Cinema (user) they will definitely not look the same.

In my case, both were on the same Picture settings profile, but clearly one had things different than the other. So I recommend u check every single setting, if you are seeing differences.

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Hi @Newbie_from_NJ

Just did a test and walk through the settings on the same Profile that I used for CoreElec and Internal player and you’re right! Settings were not the same.

Now picture are on both are pretty similar, Thx!

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Must say I just saw this thread and Netflix via my TV showing HDR content is much brighter than via CoreElec on the N2. Almost like HDR via N2 needs a gamma adjustment on my OLED. Picture settings on both are the same so no real reason for it other than different processing I guess.

Edit - turning on Contrast Control to Auto and HDR Auto Brightness to On yields a much closer image reproduction to internal player. Noticeably brighter. Might run with that I think. Anyone with a Panasonic GZ series might wish to try this also if affected.