Color space which setting to select?

[Mount81]

I've already linked the chart that explains what modes you can have with 4K resolution and different output frequencies. In the case of 1080p TV the best you can get is to set to 444/10bit or 8bit. ->Again, check with your own eyes what you would find -maybe a slightly- better during video playback.  Even in the case of 8bit videos you may can get equal or even a slightly bit better result with 10bit (and even if you'r TV is 8bit only).

To make the above test correctly with 4K TV: Set it to 4K and 420/10bit and play a 4K/10bit video, and than check with the tool if it switches to 444/10bit or 422/10bit during video playback.  The best and most desired result would be 444/10bit.

Would be suggested to keep the above settings and also test it with 1080p/8bit videos. 444/10bit would be the best result indeed.   

If you set it on any 4K/8bit mode, than I guess it won't adapt the bitdepth according to the source, so it will stay on 8bit even if you play a 10bit video. But you can also check this with that tool.

[DMD]

I did a test
as soon as the HiMedia is turned on, it is set YCbCr420 10 bit




When I play a 4K HDR file, it is set as it should be



One problem I found is this:
If I first launch an SD or HD non-HDR file, with YCbCr 422 color space, and after I launch the 4K HDR file again, the color space is "locked" on YCbCr422, as shown by Info Diagnostic Tool (The file is 59.940fps)




By restarting the HiMedia and launching the 4K HDR file first, the color space is YCbCr420 10 bit.

I do not understand why this happens.

[nmou88]

Does 4:2:2 switch automatically to 10 when playing hdr video ?

[DMD]

No.
When it's just turned on, if I first launch 4K HDR file I get 420 @ 10bit.
When it is in the 422 state, if I launch the 4K HDR file, it does not switch to 420 @ 10bit.
However, the display switches to HDR mode.

[nmou88]

No.
When it's just turned on, if I first launch 4K HDR file I get 420 @ 10bit.
When it is in the 422 state, if I launch the 4K HDR file, it does not switch to 420 @ 10bit.
However, the display switches to HDR mode.

I want to know if it switch to 422 @ 10 from 422 @ 8bit
I already know it doesn't switch to 420

[Mount81]

I did a test
as soon as the HiMedia is turned on, it is set YCbCr420 10 bit




When I play a 4K HDR file, it is set as it should be



One problem I found is this:
If I first launch an SD or HD non-HDR file, with YCbCr 422 color space, and after I launch the 4K HDR file again, the color space is "locked" on YCbCr422, as shown by Info Diagnostic Tool (The file is 59.940fps)




By restarting the HiMedia and launching the 4K HDR file first, the color space is YCbCr420 10 bit.

I do not understand why this happens.

So does it stay on 422 8bit or 10bit? 422 10bit with 59.94Hz would be -theoretically- impossible as for anything 50Hz and beyond on 4K res.

Isn't it an interlaced or MBAFF video with originally 29.97fps? Maybe the tool reports back the output frequency or the colorspace incorrectly.

If it shows 422 8bit -that would be rather possible-, how I presume, then the player just fails to switch back to 420 10bit. What does it show in the settings after you played the HD videos?

And you can also try it with a 23.976fps 10bit UHD video, what happens than with the colorspace and the bit depth?

[DMD]

I tried to set the YCbCr 444 8bit color space, and with this setting it always stays fixed with both 4K HDR files and HD and SD files.





At this point what is better to set 422 (bit?) or 444 8bit?

[Mount81]

As I wrote many times before: -theoretically- at same bit depth level, 444 is always the best option. As well as to check the difference with your own eyes, and decide regarding which you -may- find slightly better. At most cases there would be minor differences anyway between 422 and 444, but they also might can be perceptible. The safer to say is to set it to 444. This only in the case if those both give you 8bit during playback.

As the best still would be, if you could have it switched to 10bit somehow for 10bit videos, as in most cases 10bit rather can make more significant PQ enhancement.

If the setting 422 (no bits) gives you any 4xx 10bit output while playing a 10bit video, I would go for that one for sure. 

[DMD]

The problem of this player I could not understand why it does not keep the settings 4.2.0@10bit.

[Mount81]

Have you tried with any OFW?

[DMD]

No! only FWC 2.0.4

[Mount81]

Maybe someone with OFW could test this. I can't since i don't have a 4K TV.

[DMD]

Is look like you forgot to add code line on Q5Q10PRO-OUPUTINFO.bat file.

Code: [Select]

adb shell "grep Color /proc/msp/hdmi0"Please added somewhere after line 21/22.

grep command will add info like that

Code: [Select]

DeepColorMode  : 30                    SpdInfoEnable  : NO
OutColorSpace  : YCbCr444              MpegInfoEnable : NO
ColorSpaceAdapt: NO                    DeepColorAdapt : NO


I apologize for forgetting to thank you for suggesting that I enter the commands in the diagnostic program.
Thank you

After line 20 I added a few lines to remind me of the values of DeepColor.

Code: [Select]

echo --------------------------------------------------
echo REMEMBER: DeepColorMode 24=8Bit 30=10Bit 36=12Bit
echo --------------------------------------------------

[DMD]

I've done some tests and it works 10 bit even with YCbCr444 color space, but only at the 30Hz frame rate.
Having selected HDMI auto adaptation, the resolution of HiMedia is automatically set to that of the 2160P 60Hz display Oled 4K, also with demo movies or filming with fps 60Hz it is impossible to use the 10 bit color space. 
However, the doubt remains if this condition also occurs with the official Firmware. 

[Mount81]

Why you did set HDMI auto adaptation on, what's the need of that? It's rather advised to leave it OFF in most cases.

You mean it switches form 422 (no bits) to 444 10bit with 30Hz/fps videos? Didn't you mean 23.976Hz/fps? And in the case of 60Hz/fps 10bit videos it switches to 422 8bit? With 60fps and 10bit videos it should switch (or stay on) 420 10bit as the best case. Try both settings 422 (no bits) and 420 10bit on 60Hz.