Dolby Vision now possible through MP4 Mux.

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yossSP
Posts: 54
Joined: Tue Feb 16, 2021 7:42 am

Re: Dolby Vision now possible through MP4 Mux.

Post by yossSP »

RESET_9999 wrote:
Mon Feb 27, 2023 5:18 pm
LV8HD wrote:
Mon Feb 27, 2023 5:04 pm
@RESET_9999 What do you think about Auto Generated Dolby Vision?
I mean, usually, behind every grade there's a human eye that checks the grade result often with the supervision of the movie director himself. So my question is: When we do custom grades (auto generated with DaVinci), is the movie director intent of watching the movie preserved? if so, is it really that better than having standard HDR10?
L1 metadata is generated by an algorithm(it just map the hdr grade) and only the L2 trims are done manually so the intended look is preserved.
So, is this generated Dolby Vision really better than having standard HDR10? well, I really though that it couldn't beat the quality of the source file.
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 »

jayper wrote:
Mon Feb 27, 2023 11:47 pm
Harry Potter and the Sorcerer's Stone. MKV file made with MakeMKV has 219173 frames.
Thanks, I just checked mine and it's in sync.
But it is better to always verify the scene cut when you inject someone else RPU.
RESET_9999
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Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

yossSP wrote:
Mon Feb 27, 2023 11:53 pm
So, is this generated Dolby Vision really better than having standard HDR10? well, I really though that it couldn't beat the quality of the source file.
Of course, you send brightness information(L1 min avg and max) about the content to the TV shot by shot.
So the tone mapping is a lot superior than what you get with the static HDR tone mapping curve because the TV knows in advance how the next shot will be.
jayper
Posts: 304
Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

RESET_9999 wrote:
Mon Feb 27, 2023 11:58 pm
But it is better to always verify the scene cut when you inject someone else RPU.
When you say "verify the scene cut" do you mean verify the frame counts of the video file and the rpu, like I did? Or is that a specific process I can run with the tool?
uhdiznotenough4mee
Posts: 14
Joined: Mon Aug 30, 2021 9:34 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by uhdiznotenough4mee »

jayper wrote:
Mon Feb 27, 2023 11:47 pm
RESET_9999 wrote:
Mon Feb 27, 2023 11:12 pm
jayper wrote:
Mon Feb 27, 2023 10:44 pm
I went through the Hybrid maker and removed four frames. Is there anything more to it than that?
nothing more to do... which movie is it?
Thanks for the reassurance.

Harry Potter and the Sorcerer's Stone. MKV file made with MakeMKV has 219173 frames.
Be careful. You need to use US UHD and not EUR UHD. The source for the DV WEB-DL is the American version with Harry Potter and the Sorcerer's Stone, EUR UHD is Harry Potter and the Philosopher's Stone. Some scenes were refilmed between the two versions and therefore DV from one wouldn't exactly match with another.
jayper
Posts: 304
Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

uhdiznotenough4mee wrote:
Tue Feb 28, 2023 12:07 am
jayper wrote:
Mon Feb 27, 2023 11:47 pm
RESET_9999 wrote:
Mon Feb 27, 2023 11:12 pm

nothing more to do... which movie is it?
Thanks for the reassurance.

Harry Potter and the Sorcerer's Stone. MKV file made with MakeMKV has 219173 frames.
Be careful. You need to use US UHD and not EUR UHD. The source for the DV WEB-DL is the American version with Harry Potter and the Sorcerer's Stone, EUR UHD is Harry Potter and the Philosopher's Stone. Some scenes were refilmed between the two versions and therefore DV from one wouldn't exactly match with another.
Thanks for the tip. I have the US UHD.
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 »

jayper wrote:
Tue Feb 28, 2023 12:03 am
When you say "verify the scene cut" do you mean verify the frame counts of the video file and the rpu, like I did?
oh by 4 frames you meant the script complained about a framecount mismatch when injecting the RPU??
if yes, then it is normal to have a framecount mismatch because it's rarely the same as the WEB-DL. What matter is if the rpu scene cut match your bluray scene cut.
Or is that a specific process I can run with the tool?
workflow is (2-4) and check the animated gif ("Verify DV synchronization.gif") in the tutorial folder.
jayper
Posts: 304
Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

RESET_9999 wrote:
Tue Feb 28, 2023 12:10 am
oh by 4 frames you meant the script complained about a framecount mismatch when injecting the RPU??
if yes, then it is normal to have a framecount mismatch because it's rarely the same as the WEB-DL. What matter is if the rpu scene cut match your bluray scene cut.
No, I opened the created MKV in StaxRip to verify the frame count of the MKV. I also ran the 2-2 workflow to view the frame count of the RPU. I noticed the four frame distance and then when running the 1-1 Hybrd workflow, I re-synced the RPU by removing 4 frames.
RESET_9999 wrote:
Tue Feb 28, 2023 12:10 am

Code: Select all

 Or is that a specific process I can run with the tool?
workflow is (2-4) and check the animated gif ("Verify DV synchronization.gif") in the tutorial folder.
Thanks very much, I will check that one out! I had no idea it existed. Thank you.
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 »

jayper wrote:
Tue Feb 28, 2023 12:14 am
No, I opened the created MKV in StaxRip to verify the frame count of the MKV. I also ran the 2-2 workflow to view the frame count of the RPU. I noticed the four frame distance and then when running the 1-1 Hybrd workflow, I re-synced the RPU by removing 4 frames.
I see, then you didn't have to remove 4 frames. You still should always verify sync with (2-4)
jayper
Posts: 304
Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

Thanks again for all the help today. I will verify with 2-4 and try again. Thanks so much.
jayper
Posts: 304
Joined: Sat Sep 29, 2012 5:57 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by jayper »

RESET_9999 wrote:
Mon Feb 27, 2023 11:58 pm
jayper wrote:
Mon Feb 27, 2023 11:47 pm
Harry Potter and the Sorcerer's Stone. MKV file made with MakeMKV has 219173 frames.
Thanks, I just checked mine and it's in sync.
But it is better to always verify the scene cut when you inject someone else RPU.
I watch the film last night and I honestly don't think it has ever looked better. I've seen it so many times at this point, and I was blown away. It'd been a few years, so maybe I am out of touch with the HDR10 grade... I was also really focused on colors and the presentation, so maybe there's a bit of placebo effect happening, but I was quite happy. One of these nights, I need to try and flip flop between the HDR10 and DV for comparison. Thanks again for all the help!
Gatorman
Posts: 78
Joined: Thu Feb 10, 2022 3:47 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by Gatorman »

@RESET_9999

Is this a video that might benefit from a Resolve generated RPU? Original file is BL+FEL+RPU.

Video P7 to P8_DoVi_plot.png
Video P7 to P8_DoVi_plot.png (105.43 KiB) Viewed 5544 times
More reasons to collect physical media. 2019 Shield TV Pro.
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 »

Gatorman wrote:
Wed Mar 01, 2023 8:02 pm
@RESET_9999

Is this a video that might benefit from a Resolve generated RPU? Original file is BL+FEL+RPU.
not sure i understand your question... Why would you generate DV when you have the original retail metadata?
Gatorman
Posts: 78
Joined: Thu Feb 10, 2022 3:47 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by Gatorman »

RESET_9999 wrote:
Wed Mar 01, 2023 8:36 pm

not sure i understand your question... Why would you generate DV when you have the original retail metadata?

That's fair. Is it common to see an "Average" line flat for so long?
More reasons to collect physical media. 2019 Shield TV Pro.
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 »

Gatorman wrote:
Wed Mar 01, 2023 9:16 pm
That's fair. Is it common to see an "Average" line flat for so long?
yes and you would get the same metadata with resolve.
AS long as it's not static or incorrect, the graph (L1) is supposed to be a perfect representation of the HDR grade.
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