Dolby Vision now possible through MP4 Mux.

[sofakng]

viewtopic.php?p=124752#p124752

Thanks ... I've read that but I'm confused especially regarding the Oppo 203. This player was regarded as the best (ie. "reference quality") but nobody has noticed this bug for years? (and no reviewer mentioned this problem when testing, etc?)

[RESET_9999]

Thanks ... I've read that but I'm confused especially regarding the Oppo 203. This player was regarded as the best (ie. "reference quality") but nobody has noticed this bug for years? (and no reviewer mentioned this problem when testing, etc?)

well, the bug only affects the newer TV, and quietvoid's pattern is quite recent and without it, it can be hard to spot.
I heard a lot of people with CX/C1 saying that they find the quality much better using the internal TV player. Now it makes more sense than ever.

Also, the DV engine is a black box to the player. So its not oppo,sony's fault

[sw5163]

maybe they can update old players to cm4.0?

Dolby can do that, it's only a matter of whether they want to.
There's no way for Apple to prepare hardware for 5 years ago iPad to do cmv4.0.
In fact, I think they can let any device that is capable of decoding 2 hevc tracks at same time be able to display FEL through software update.

[sw5163]

Does anyone know if there is a better way to hybrid RPU to BL?
I'm trying to extract RPU from profile 5 ICtCp Pirates.of.the.Caribbean.2003 and hybrid that to Bluray BL to get unofficial MEL.
The only problem is RPU in P5 is like 0.5s ahead of the Bluray. But P5 is actually slightly longer than Bluray.
So is there a better way to find out how many RPUs I should exactly duplicate at the begining instead of try again and again? Many thanks.
By the way, there is no DV Bluray for this series right? I couldn't find any on rar*g.

[deadchip12]

Could someone explain in layman term how this new L1 bug affects the picture quality?I read the last few pages but don't quite get it. I'm using the recently purchased x700 with the lg c9 oled and it sucks if it turns out the x700 is unusable again.

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I'm using the recently purchased x700 with the lg c9 oled and it sucks if it turns out the x700 is unusable again.

C9 has the old DV engine so you don't have this problem.

[deadchip12]

I'm using the recently purchased x700 with the lg c9 oled and it sucks if it turns out the x700 is unusable again.

C9 has the old DV engine so you don't have this problem.

Hmm I see... so the newer TVs have the new DV engine and the x700/x800m2 have the old one and that causes issues? Do you know what is the difference between the new and old DV engine? And what is the effect of this mismatch on picture quality exactly? Dimmer images?

If this is a software related problem, hopefully Sony can push an update on the x700/x800m2. I wonder if this only happens with files played via usb or to discs as well.

[sofakng]

Yeah, this Dolby Vision stuff is really complicated.

What's the interaction between the player (x700/x800m2) and the TV (LG C9, CX, C1, etc) ?

If the bug is in the player, then why does the TV make a difference?

[RESET_9999]

it's not a player bug.
It's Dolby's faulty implementation in newer TV.

[RESET_9999]

Hmm I see... so the newer TVs have the new DV engine and the x700/x800m2 have the old one and that causes issues?

it looks like it.

And what is the effect of this mismatch on picture quality exactly? Dimmer images?

brighter(in a bad way) and more clipped image

[deadchip12]

it's not a player bug.
It's Dolby's faulty implementation in newer TV.

Oh so the new engine is faulty? Then I guess Dolby and LG have to work together to release an update on the newer TVs. I will try tagging Vincent from HDTV Test on twitter so he can be aware of this. He has good contacts at LG.

[RESET_9999]

Oh so the new engine is faulty? Then I guess Dolby and LG have to work together to release an update on the newer TVs. I will try tagging Vincent from HDTV Test on twitter so he can be aware of this. He has good contacts at LG.

yes I'm sure it can be fixed.
you could add a link to quietvoid's pattern.
viewtopic.php?p=124732#p124732

[sofakng]

it's not a player bug.
It's Dolby's faulty implementation in newer TV.

I thought if you use the LG CX/C1 internal player then it's OK?

If it's the TV then I would expect that to not work?

[sw5163]

Could someone explain in layman term how this new L1 bug affects the picture quality?

From https://professionalsupport.dolby.com/s ... uage=en_US

屏幕截图 2022-07-21 221050.png (79.3 KiB) Viewed 21378 times

To my understanding, L1 contains the overall calculated dynamic range of scene.
L2 contains how exactly filmmaker would want the image to be tone mapped when L1 exceeds the limitation of the TV. It's basically like this:

When the range of a scene is 2-200 nit and TV is 0-1000, nothing will be tone mapped and just follow exactly the PQ curve.
When the range of a scene is 0-2000 and RPU has L2 metadata to instruct how image on 600nit TV should be tone mapped, the TV will follow that curve.
When the range of a scene is 0-2000 but no L2 metadata present, it should generate a default tone mapping curve based on the TV brightness and L1 data and follow that.
So if L1 is not used, it will be HDR10 without tone mapping(clipped).
Please correct me if I'm wrong.

I'm sure it can be fixed through update, so relax.

Does anyone know if there is a better way to hybrid RPU to BL?

[RESET_9999]

I thought if you use the LG CX/C1 internal player then it's OK?
If it's the TV then I would expect that to not work?

it's up to the newer hardware to be backward compatible with older stuff, not the other way around.
When you play something with the internal player, there is no cmv2.9 from an external source involved except the content itself.