Dolby Vision now possible through MP4 Mux.

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morbius
Posts: 176
Joined: Mon Aug 13, 2018 7:17 am

Re: Dolby Vision now possible through MP4 Mux.

Post by morbius »

Can you expand on selecting MDL based on content actual brightness? I guess there is a workflow for identifying the content brightness, and based on that I pick from one of the fixed 1000/2000/4000 options?
I measure brightness with 6-2 and select MDL accordingly.
Using 6-2 on my copy of Batman Begins, I get %frames with MaxCLL > 1000 = 12.78 and >2000 = 0. So do I set the MDL to 2000, as that's the lowest level of the available options that includes the maximum brightness?
RESET_9999
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Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

morbius wrote:
Fri Sep 13, 2024 9:18 am
Using 6-2 on my copy of Batman Begins, I get %frames with MaxCLL > 1000 = 12.78 and >2000 = 0. So do I set the MDL to 2000, as that's the lowest level of the available options that includes the maximum brightness?
sounds right
morbius
Posts: 176
Joined: Mon Aug 13, 2018 7:17 am

Re: Dolby Vision now possible through MP4 Mux.

Post by morbius »

thanks, and given that 6-2 creates measurements, can they be reused to speed up 3-1?
RESET_9999
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Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

yes rename the 6-2 generated RPU the same as your mkv input and run 3-1
morbius
Posts: 176
Joined: Mon Aug 13, 2018 7:17 am

Re: Dolby Vision now possible through MP4 Mux.

Post by morbius »

Many thanks. What's the consequence of selecting the MDL as 2000 vs 4000 nits in 3-1 for something like Batman Begins? Would 4000 make the image render on my TV as slightly darker?
RESET_9999
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Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

yes slightly darker
morbius
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Joined: Mon Aug 13, 2018 7:17 am

Re: Dolby Vision now possible through MP4 Mux.

Post by morbius »

that would explain why my conversion of Thor looks a touch dark, according to MediaInfo the MDL is 4000. For some titles MediaInfo reports values of MaxCLL but based on a first check, with Batman Begins, the value is nowhere near correct. So presumably should ignore MediaInfo fir this key parameter?
RESET_9999
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Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

yes I always ignore mediainfo metadata.
jayper
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Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

When creating hybrids, what is the recommendation with respect to editing L6 or not?

I primarily watch my hybrids in Dolby Vision, but in some cases I am limited to HDR10. What should I so, update L6 or not?

Thanks!
RESET_9999
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Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

there might be some devices that use L6 when they decode DV as HDR10 but otherwise, it's pretty much useless.
jayper
Posts: 316
Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

RESET_9999 wrote:
Sat Sep 14, 2024 12:02 am
there might be some devices that use L6 when they decode DV as HDR10 but otherwise, it's pretty much useless.
Thanks very much!
jayper
Posts: 316
Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

RESET_9999 wrote:
Sat Sep 14, 2024 12:02 am
there might be some devices that use L6 when they decode DV as HDR10 but otherwise, it's pretty much useless.
Sorry, follow-up question. If you're watching DV content, with updated L6, on an HDR10-only device. Does it even matter? Or is it only something that a DV device can use? And if you are on a DV-capable device, and playing back in DR10, is it better to update the L6 or not? Sorry... I clearly need to do more reading on L6.

Appreciate the guidance!
RESET_9999
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Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

If you're watching DV content, with updated L6, on an HDR10-only device. Does it even matter?
if the device sends the static L6 metadata to the TV, yes. For example, on the ugoos, unless you specify an HDR10 string in the menu, it sends LLDV in HDR10 without static metadata which is not ideal. Preferably, you want to send a maxcll or MDL value that matches your EDID target so the TV can use the best static tone mapping curve for the image brightness it receives.

However, it also depends on whether your TV uses MDL or maxcll for HDR10.
staknhalo
Posts: 161
Joined: Sun Oct 11, 2020 12:05 am

Re: Dolby Vision now possible through MP4 Mux.

Post by staknhalo »

Here's a DV profile 4? (SDR HEVC BL?) file I came across from someone linking on Plex forums:

Image

https://mega.nz/file/QGRwQQQB#_3ErgcM5Y ... UTE8eau8Tc
DylanValenti
Posts: 36
Joined: Sat Dec 19, 2020 9:42 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by DylanValenti »

Trying to export FEL screenshots without an nvidia gpu but it's not working. It says that it exports the screenshots but the folder doesn't have any in it. I downloaded the latest tool pack and ffms2 is in it, so any idea what's going on here?
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