Dolby Vision now possible through MP4 Mux.

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ColonelBlimp043
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Re: Dolby Vision now possible through MP4 Mux.

Post by ColonelBlimp043 »

I am in the process of generating RPUs for some of my UHD HDR10 rips with 3-1. Pardon if this has already been asked before, but is there a recommended procedure for setting the L5 offsets on films with variable aspect ratios (i.e. Nolan IMAX UHD). Should I set the L5 offsets at 0 to accommodate the 1.78:1 IMAX scenes, or is it recommended to use the appropriate widescreen offsets, since those scenes make up the majority of the runtime?
RESET_9999
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Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

ColonelBlimp043 wrote:
Thu Sep 12, 2024 11:23 am
Should I set the L5 offsets at 0 to accommodate the 1.78:1 IMAX scenes
yes 0, otherwise if you watch on a device that uses L5 (tv internal player), there will be a letterbox for the Imax shots.
Sorry for my English.
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morbius
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Re: Dolby Vision now possible through MP4 Mux.

Post by morbius »

RESET_9999 wrote:
Mon Sep 09, 2024 6:53 pm
I'm using the values provided by MediaInfo, is that correct?
yes
One point in this workflow that does not have an automatic option is the prompt for the Mastering Display choice
it's because I prefer selecting MDL based on the content's actual brightness.
So, after what proved to be an educational journey, I now have John Wick 2 in DV7 FEL with TrueHD audio and the forced subs. When doing the final mux I set a delay of 1001ms on the video and the forced subs, and I have perfect audio sync with the video. The result is well worth the effort! JW1 will be much easier.

In the quote above, I asked about the 3-1 workflow for converting HDR10. 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?
morbius
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Re: Dolby Vision now possible through MP4 Mux.

Post by morbius »

I received the Italian JW1 disc today
subs for the Italian BD JW1:
https://drive.google.com/drive/u/0/fold ... hC2TOamMyS
thanks for the link. The JW1 subs are extremely dark. I tried to fix that using the 9-5 workflow with the .bat file changed to set the brightness adjustment to 150%, but it didn't help. Any other method for fxing that?
RESET_9999
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Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

morbius wrote:
Thu Sep 12, 2024 8:25 pm
Any other method for fxing that?
I don't know, convert to SRT.

https://github.com/SubtitleEdit/subtitleedit
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.
Sorry for my English.
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deadchip12
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Re: Dolby Vision now possible through MP4 Mux.

Post by deadchip12 »

RESET_9999 wrote:
Thu Sep 12, 2024 1:39 am
Because the DV source is the P5 webdl and sometimes the studios decide to deliver a different version for the HDR10 stream. Marvel's Black Widow is one of those IIRC.
Ok so we need to use P5 webdl to transfer DV to HDR10 bluray.

If the bluray already has DV and we just want to transfer cmv4.0 bloc to bluray, can we use P8 webdl or do we have to use P5 as well? Quite hard to find P5 webdl online.
RESET_9999
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Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

we just want to transfer cmv4.0 bloc to bluray
what matters is the metadata only. hdr10 brightness doesn't matter
Sorry for my English.
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deadchip12
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Re: Dolby Vision now possible through MP4 Mux.

Post by deadchip12 »

RESET_9999 wrote:
Fri Sep 13, 2024 12:14 am
we just want to transfer cmv4.0 bloc to bluray
what matters is the metadata only. hdr10 brightness doesn't matter
In case I can't find the P5 webdl online to do the DV tranfer to HDR10 bluray, can I use the .bin files in your RPU folder? I just checked one and they were P8, not P5?
RESET_9999
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Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

deadchip12 wrote:
Fri Sep 13, 2024 12:56 am
can I use the .bin files in your RPU folder? I just checked one and they were P8, not P5?
yes, my RPUs are P8 synced and ready to be injected.
Sorry for my English.
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morbius
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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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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
Sorry for my English.
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morbius
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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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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
Sorry for my English.
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morbius
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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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Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

yes slightly darker
Sorry for my English.
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