The issue is not just on oppo, if you refer to earlier thread egreat also suffer the same issue. I had a himedia q10pro also with same problem.

HDR looks fine on Netflix and PS4 pro game but not with ripped files. I think this is due to the security issue.

When i watch 4K files, i need to switch it to SDR but it defeats the purpose of UHD iso/BDMV if we cant enjoy HDR.

this Egreat A5 is actually giving me quite a big headache.

When i want to use YCBCR420 10bit, it tells me that only 4k50 or 4k60 supports it but somehow when i switch to 4k50, it tells me that YCBCR420 10 bit is not supported.

i need the 10bit as the 8bit color banding is quite obvious. this is not very noticeable with my 50" LED but its very irritating when its on large screen projector.

at 2160p24hz, u should be able to set to ycbcr444 10bit.

at 2160p50 or 60hz, u should be able to set to ycbcr420 10bit.

both, u can't.

i can do both with q10pro.

if yr tv, projector, AVR, cables are 10 bit compliant, that is very strange.

firmware bug?

can't get help from seller or forum?

This post has been edited by AVFAN: Sep 25 2017, 04:07 PM

i cant do both the setting.

so far no other forum has mentioned any of this regarding the Egreat A5. Probably have to wait for the new firmware. quite frustrating.

checked again... yes, the 4kHDR bdmv is inherently a little darker than the 1080p bdmv - for the same TV setting.

i played around with this a bit...

since it is a little darker, can use another TV mode, e.g. from "movie" to "dynamic", tweak the variables it to your liking.

when satisfied, it is obvious the 4kHDR ones are clearer, more details and with deeper colors - quite stunning actually!



also, like to check with u... yr egreat has the full BD menu, right?

does it work for 4kHDR bdmv, 3D bdmv?

This post has been edited by AVFAN: Oct 11 2017, 11:30 AM

i have managed to solve the 4k HDR image quality. i bought the Spyder 5 to calibrate as the JVR comes with its own calibration software by laptop.

i downloaded the custom gamma curve for HDR and it improves the quality drastically.

once the custom gamma curve is in place and the color fully calibrated with the Sypder, the image looks stunning.

i have also managed to run 4:2:0 10bit quality. the problem was with the Yamaha A3060 4K mode. it was set to mode 2 therefore the 10bit was not supported but once i changed it to Mode 1, it solved the problem.

somehow this Mode 1, it does not work with my Ps4Pro. my headache now is that i need to manually switch to mode 2 whenever i use my PS4 pro.

as for the 4K HDR BDMV, the unit supports full BD Menu and the 3D works too. The menu support was the main reason i bought the EGreat A5.

Ok, thanks, good to know.

calling u to join in the discussion, if anything to add!
what player and tv r u using for that?

i like to explore this issue further (w/o mentioning specific titles to avoid copyright issues.)

i have tried a few more 3840x2160 HDR10 bdmv's.

yes, they do come out a little dark.

while my himedia q10pro (which shares the same chipset and imprex2 engine with egreat A10) can do HDR10, my 4k tv is not rated HDR.

i am curious if such files are not well done or my tv is lacking - a 4k but non-HDR tv (will surely buy HDR next one!).

or it has to be calibrated in a special way?

there is no problem with other 3840x2160 10bit files, only those BDMV's.

still, with adjustment of the q10pro HDR saturation, using a diff tv mode and settings, i can still get a great picture.

these bdmv's are clearly good - for details, clarity, color depth, color accuracy.

This post has been edited by AVFAN: Oct 26 2017, 08:02 PM

4k HDR will definitely be slightly darker than 1080P movie in some way.

http://www.hdtvtest.co.uk/news/4k-vs-201604104279.htm

the article above will clear up some confusion regarding image being darker. in a way, the total dynamic range has been increase thus seeing more details.

this however can be reduced by having the TV calibrated. i calibrated my JVC projector with Sypder 5 with a custom Gamma curve. the gamma curve of REC709 and BT2020 is very different therefore using a custom gamma curve would helped improved the image drastically for HDR 4K. using the linear line gamma would produced a very dull image with overexposed image and the dark areas are very grey instead of black thus creating a very 2D image with less pop in the overall effect.

as for the issue of the PS4Pro not able to handle HDR with Yamaha, i realized the problem is due to the Wireworld HDMI cable. the 12m active cable is rated at hdmi 2.0 with 18gbps but it failed to deliver HDR at 4:4:4@60hz. the image just failed to be display on my projector. when i changed to the audioquest, it solved the problem but it will have intermittent signal issue. if you plan to use >12m cable, i would suggest going for HDMI Optical cable instead.

ah... that explains a lot.

so, max backlight, play with contrast, i guess.

those bdmv's are not a problem then.

thanks for the article!

This post has been edited by AVFAN: Oct 26 2017, 08:05 PM

Bro, if u hv been playing the newest 4k hdr stuff.

I think the makers have come around, rectified it.

New 4k hdr blurays aren't as dark as the older ones.

With great colors.

Good stuff, love them!

Can the a10 stream netflix in hd (1080p). Tks.

This post has been edited by aaronlai143: Dec 1 2018, 03:57 PM

Can it play rmvb files?

Nice media player with support dolby atmos

This post has been edited by Sunnybjk: Sep 17 2020, 11:05 PM

seriously? it took awhile for me to recall this file extension.