Dolby Vision now possible through MP4 Mux.

[RESET_9999]

never i guess.

[HotFudge]

never i guess.

heh cheers!

[HotFudge]

Hi

I have a film where the top black bar is 281 and the bottom is 280.

How do I crop this correctly for dolby vision analysis?
If I under crop I will get wrong min values in my analysis and if I over crop I will not anaylze the whole active area?

Cheers

[RESET_9999]

use 281/280, L5 works just fine with non-even or non mod 2 crop.
in fact, when you select 2.39(not manually) in resolve you get L5 : 276/277

[HotFudge]

use 281/280, L5 works just fine with non-even or non mod 2 crop.
in fact, when you select 2.39(not manually) in resolve you get L5 : 276/277

AVSPMod show the Black bar area for my Inception clip test is Top 281 Bottom 280.

When I use Top 281 Bottom 280 using DoVi script the resulting rpu has L5 Top value of 280 and L5 bottom value of 281...(Should this not be the other way around?)

In resolve I tried to use Top 280 and Bottom 1879 in blanking but this also made the L5 values Top 280 and Bottom 281....

I could just edit the L5 values but I am unsure if the DV analyze process was based on an incorrect active area.

Where am I going wrong?

Cheers

[RESET_9999]

In the script 3-1 it works properly, I just tested it.
If you do the xml in resolve , you have to edit L5 when you inject in 1-1 because otherwise, the dovi_tool cannot know which side is 281 or 280 but the analysis itself in resolve is correct.

[HotFudge]

In the script 3-1 it works properly, I just tested it.
If you do the xml in resolve , you have to edit L5 when you inject in 1-1 because otherwise, the dovi_tool cannot know which side is 281 or 280 but the analysis itself in resolve is correct.

I updated to you 1.9.8.6 scipts and yes you are right your scripts work properly.

Resolve still gives top 280 bottom 281 (when I input top 281 bottom 1880 in the blanking section) so i guess i just edit the L5 for resolve xml's

Cheers

[johnjon94]

In instances when the DV video track is letterboxed, but the HDR track is cropped - how should the RPU be adjusted?

For instance -
Jack Ryan Season 4 Amazon -
DV: 3840x2610, HDR: 3840x1600

[RESET_9999]

always match L5 to the BL you're injecting
No letterbox = 0

[speeddemon]

Has anyone figured out why CM_Analyze gets so slow sometimes?

[Gatorman]

btw, I got a response from Dolby about the Cm_analyze.exe slow performance:

Our Professional Tools make use of Apple’s ProRes decoding library and we have identified performance bugs, including lack of GPU accelerated decoding on Windows and Linux, and a severe performance hit when running on some AMD chips, including their high-performance scalable EPYC chips.

Unfortunately, we are dependent on Apple updating their ProRes libraries to get this fixed.
Until we get an update from Apple, the only recommendation we can offer is to use JPEG2000 which has full GPU decoding support.

I'm sorry I can't give you any better news.
Let me know if there's anything else we can support with.

Thanks,

Michael

[deadchip12]

Recently I have encountered more freezing on my x700 than ever before. Looks like a problem between my 4TB external HDD and the bluray player. A lot of the times folders inside the hdd won't show up at all and turning off the player then will make it freeze (black screen - unable to reboot until I unplug and replug the power adapter). Playing a video (regardless of whether it is in 4k or 1080p, HDR or SDR) and exiting it midway will make the player freeze as well. Very frustrating. Any ideas why?

[Amaury]

I everyone,

I downloaded DDVT TOOL but I’m having a hard time understanding how DV works. I hope someone can help me understand better.

For exemple I have a HDR remux and I would like to inject a DV layer from another source (same number of frames, but the DV source is cropped), do I have to add the base layer and the rpu or just the rpu ? Is there a specific order ?

If I understand correctly DV is based on frame number, if I want to convert a movie from 23,976 to 24 fps do I have to edit something ?

Thanks,

Amaury

[skull88]

Amaury,

That's another tool with its own dedicated thread over at doom9, so I recommend visit there: https://forum.doom9.org/showthread.php?t=183479
As for DoVi_Scripts, which is mostly discussed here, you should read all of the information first in the readme on github and try it first, then ask any remaining questions.

[speeddemon]

Now the problem is that most of the CMv4.0 movies only have a 100nits L8 trim pass which is obviously not used in DV playback but they do have proper L2 trims that are ignored on cmv4.0 devices (shield/firestick/appletv/internal tv ). So you get inferior quality on those devices unless you remove the CMV4.0 block.

@RESET is this still true?