Dolby Vision now possible through MP4 Mux.

[DylanValenti]

Wow I’m an idiot lol. Thanks for the response🫡

[dysprosium]

HDR10 playback is fine as long as your player doesn't tonemap DV to HDR10 like the x800m2/x700 can do when you have DV set to ''on'' and play a TS/M2TS rip.

Thanks for your response, one more question for you:

You've noted that P5 > P8 due to the colourspace being equivalent to 11.5-bit YCbCr > 10-bit YCbCr.
Is there a noticeable difference between P8 and P5, assuming that it's the same master/streaming quality, on consumer-grade 10-bit panels?
Similar to how there are certain FEL films e.g. Saving Private Ryan where the 12-bit BL+FEL+RPU has noticeable brightness/colour/quality differences compared to the 10-bit BL+RPU?

Sorry to ask you so many questions but you are truly the authority on all things DV!

[RESET_9999]

Thanks for your response, one more question for you:

You've noted that P5 > P8 due to the colourspace being equivalent to 11.5-bit YCbCr > 10-bit YCbCr.
Is there a noticeable difference between P8 and P5, assuming that it's the same master/streaming quality, on consumer-grade 10-bit panels?
Similar to how there are certain FEL films e.g. Saving Private Ryan where the 12-bit BL+FEL+RPU has noticeable brightness/colour/quality differences compared to the 10-bit BL+RPU?

Sorry to ask you so many questions but you are truly the authority on all things DV!

Not really.
But any AppleTV webdl has some static color reshaping in the RPU which messes up the colors IMO.
You have plenty of P5 vs HDR10 BL comparisons here: https://docs.google.com/spreadsheets/d/ ... =917134052

[Baer2021]

Hello - I'm running into an issue getting my UGOOS AM6B Plus to boot from the SD card once I've used Rufus to write the image on my PC, moved the correct .dtb file and renamed it along with changing the file extension to "dtb.img" and copied dovi.ko over. When I hold the recovery button it just goes to the Android boot screen and a couple of times it seems like it has tried to use the SD card but I just get a S922X logo that flashes on my screen before the device keeps power cycling itself. Has anyone run into this?

[sw5163]

You've noted that P5 > P8 due to the colourspace being equivalent to 11.5-bit YCbCr > 10-bit YCbCr.
Is there a noticeable difference between P8 and P5, assuming that it's the same master/streaming quality, on consumer-grade 10-bit panels?

Difference, yes. Noticeable, no.
https://www.avsforum.com/threads/dolby- ... 7.2930062/

Similar to how there are certain FEL films e.g. Saving Private Ryan where the 12-bit BL+FEL+RPU has noticeable brightness/colour/quality differences compared to the 10-bit BL+RPU?

10-bit panel can show 12-bit content with dithering, but at least for me, it's basically impossible to tell the difference when 10-bit content is properly implemented. However, Dolby FEL is also 4:2:2 sub-sampling. The difference between 4:2:2 and 4:2:0 can be noticed around high contrast edges.

[razierklinge]

Hello - I'm running into an issue getting my UGOOS AM6B Plus to boot from the SD card once I've used Rufus to write the image on my PC, moved the correct .dtb file and renamed it along with changing the file extension to "dtb.img" and copied dovi.ko over. When I hold the recovery button it just goes to the Android boot screen and a couple of times it seems like it has tried to use the SD card but I just get a S922X logo that flashes on my screen before the device keeps power cycling itself. Has anyone run into this?

For AM6B+/CoreELEC support, I'd ask here: https://discourse.coreelec.org/t/dolby- ... 24273/1320

But from my experience, what you described worked fine for me. I held the recovery button down until I saw the "CoreELEC" screen and then I was good to go.

[gpmc01]

Hello - I'm running into an issue getting my UGOOS AM6B Plus to boot from the SD card once I've used Rufus to write the image on my PC, moved the correct .dtb file and renamed it along with changing the file extension to "dtb.img" and copied dovi.ko over. When I hold the recovery button it just goes to the Android boot screen and a couple of times it seems like it has tried to use the SD card but I just get a S922X logo that flashes on my screen before the device keeps power cycling itself. Has anyone run into this?

You should raise this issue in Coreelec Forum to get proper support.

[kazuma]

what is a dual-track and dual-layer exactly? can someone describe in simple terms?

[sw5163]

what is a dual-track and dual-layer exactly? can someone describe in simple terms?

Dolby Vision is really complicated, you may want to do more research to learn how it actually works.

In human words:
BL(base layer): an HDR10 2160p YCbCr 4:2:0 10-bit video.
Dolby Vision fall back to this when not supported.

EL(enhancement layer): an HDR10 1080p YCbCr 4:2:0 10-bit video.
Supported device use BL and EL to mux a final 4:2:2 12-bit video.

RPU(reference processing unit): To indicate how filmmaker would like the video to be separately shown on 100nitSDR/600nit/1000nit/10000nit display. (despite the actual brightness record in BL)

There are basically 4 types of Dolby Vision video:
Profile 5(streaming): ICtCp 4:2:0 10-bit video + RPU.
It uses a more efficient color coding, but appear green and purple on non support device.

Profile 8.1: BL+RPU
Profile 8.4: Dolby Vision shot on iPhone, HLG BL+RPU

FEL(Full Enhancement Layer)
Profile 7 DT_DL FEL: BL in one video track, EL+RPU in another video track.
Profile 7 ST_DL FEL: BL+EL+RPU in one same video track.

MEL(Minimum Enhancement Layer)
Profile 7 MEL: BL+RPU same as 8.1 just in bluray container.

Please don't hesitate to point out my mistake!

[MastaG]

I still have one of these Oppo bluray player clones which is basically the same thing but without the disc-reader.
Perhaps somebody can recommend some good (FEL) movies where the DV really stands out and make a difference?

[jayper]

I still have one of these Oppo bluray player clones which is basically the same thing but without the disc-reader.
Perhaps somebody can recommend some good (FEL) movies where the DV really stands out and make a difference?

This thread has a lot of useful information and catalogs 99% of the discs released with Dolby Vision: https://forum.blu-ray.com/showthread.php?t=276448

[kazuma]

I still have one of these Oppo bluray player clones which is basically the same thing but without the disc-reader.
Perhaps somebody can recommend some good (FEL) movies where the DV really stands out and make a difference?

I don't now of chinoppo have a decent FEL support with mp4/ts movies. Nobody tested so far i think?

DV-MKV doesn't work on it.

[jayper]

I still have one of these Oppo bluray player clones which is basically the same thing but without the disc-reader.
Perhaps somebody can recommend some good (FEL) movies where the DV really stands out and make a difference?

I don't now of chinoppo have a decent FEL support with mp4/ts movies. Nobody tested so far i think?

DV-MKV doesn't work on it.

There's a link in RESET_9999's signature that breaks down DV support across several devices. Including the Oppo.

[DylanValenti]

Hey RESET, is there a way to generate a P7 RPU with an xml file from resolve. Keeps defaulting to P8.1

[RESET_9999]

Hey RESET, is there a way to generate a P7 RPU with an xml file from resolve. Keeps defaulting to P8.1

Not directly but if you have the original P7 RPU and you used the original scene cuts, you can copy the metadata levels from your P8 RPU with workflow 2-6.
I did it a couple of times for some static P7 movies like Avatar.
Example: https://drive.google.com/file/d/12CPNlw ... drive_link