Dolby Vision now possible through MP4 Mux.

[DjObama]

Flac will be much smaller in size than LPCM, so less bandwidth used when plaing. Sometimes DV UHD movies stutter (nothing major, like 1-2 times per viewing) for me when played from external HDD, I suppose with flac it would be happening less. Especially if you'd add the option to convert to 16 bit flac instead of 24 bit. I think 16 is plenty enough. Dts-hd ma converted to 16 bit flac often take 1/4th of its original size, often less than DD+ @1,5mbps. And compared to eac3 flac is still a lossless file format = piece of mind for us audio- and vision nerds

Which playback device do you use? I just tried on my C2 and there's no direct play for FLAC/PCM, all I got was PLEX converting to DDP7.1 which is identical to my script.

LG B8. Flac works in mp4/mkv files in SDR. I don't know about DT-DL mp4s, for now I'm having troubles creating such files. Maybe you have a DV DT-DL sample with flac for testing?

[ans40]

Quick question; when generating CMv4.0 content (3-1), how does one determine what Mastering Display to use? I assuming higher isn't necessarily better?

2 options:

1- just use the static metadata from your source HDR10
2- check the brightness first with madvr. If 95% of the movie is under 1000nits, use 1000nits MDL else, 4000.

Option 2 is better because some movies have a static MDL of 4000nits but the actual brightness is under 1000nits.
A 4000nits RPU is a lot darker than a 1000nits one regardless of the content's actual brightness and in my opinion, 4000nits MDL + low nits content is wrong without L2 trim passes because if you look at the generated(or original) trims with a 4000nits analysis, they brighten/compensate a lot for the darkness a 4000 rpu brings.

https://slow.pics/c/uVX5iFOD

Hey @Reset_9999, I've hit a wall with a movie (Predators 2010) whose BL MDL is 1000nits, but measuring the BL shows most the MaxCLL over 1000 nits. I've tried fiddling with different settings (changing the DV Mastering Display and color space transforming mainly) in Resolve, but can't figure out how to generate a DV that doesn't cut off at 1000 nits. Any thoughts? https://slow.pics/c/BqRCdoHJ

[Mattl0]

I believe here is a good place to ask.

What is the highest apl scene you have seen on a hdr movie? I mean with real data.

Thanks

[Mattl0]

I just bought a Sony a95k.

I only tested this on the vimu app.

The tv can read (and be set into ) dolby vision .mkv p7 dual layer single track p7.
The same does not work with .ts files.

Is there a short clip I can try to be know if the tv read the fel layer ? And also the rpu?

Thanks.

[skull88]

Quick question; when generating CMv4.0 content (3-1), how does one determine what Mastering Display to use? I assuming higher isn't necessarily better?

2 options:

1- just use the static metadata from your source HDR10
2- check the brightness first with madvr. If 95% of the movie is under 1000nits, use 1000nits MDL else, 4000.

Option 2 is better because some movies have a static MDL of 4000nits but the actual brightness is under 1000nits.
A 4000nits RPU is a lot darker than a 1000nits one regardless of the content's actual brightness and in my opinion, 4000nits MDL + low nits content is wrong without L2 trim passes because if you look at the generated(or original) trims with a 4000nits analysis, they brighten/compensate a lot for the darkness a 4000 rpu brings.

https://slow.pics/c/uVX5iFOD

Hey @Reset_9999, I've hit a wall with a movie (Predators 2010) whose BL MDL is 1000nits, but measuring the BL shows most the MaxCLL over 1000 nits. I've tried fiddling with different settings (changing the DV Mastering Display and color space transforming mainly) in Resolve, but can't figure out how to generate a DV that doesn't cut off at 1000 nits. Any thoughts? https://slow.pics/c/BqRCdoHJ

Latest Dolby algo in Resolve with default tuning will not be identical to BL peaks, but slightly lower. Nothing wrong with your plot from what I can see.

[RESET_9999]

Hey @Reset_9999, I've hit a wall with a movie (Predators 2010) whose BL MDL is 1000nits, but measuring the BL shows most the MaxCLL over 1000 nits. I've tried fiddling with different settings (changing the DV Mastering Display and color space transforming mainly) in Resolve, but can't figure out how to generate a DV that doesn't cut off at 1000 nits. Any thoughts? https://slow.pics/c/BqRCdoHJ

use the old legacy mode if you want identical peaks to madvr measurements.. As @skull88 said, the new algo always produces lower values. it's less aggressive on the tone mapping(brighter).

[RESET_9999]

I believe here is a good place to ask.

What is the highest apl scene you have seen on a hdr movie? I mean with real data.

Thanks

https://drive.google.com/drive/u/1/fold ... KFJwFxnDt-

[RESET_9999]

LG B8. Flac works

Ok, try the next version.
line 69 set encode_LL=NO
choices are NO or FLAC or LPCM (default=NO)

[Mattl0]

I want to test an external streaming device on my tv for better fluidity.

For dv everything will be p5 , but it seems that no streamer can do tv led properly?

[thirdmoon]

@RESET_9999
In the recent Black Hawk Down 4K, why are the brightness levels so high? As per my knowledge, no TV is capable of doing those levels. How does it impact viewing it in OLED with max brightness of 700-800nits?

[RESET_9999]

Higher metadata brightness than your TV means more dimming and more tone mapping to preserve the highlights details.

While the shots peak brightness is very high, 86% of the shot's average brightness is under 25nits and 65% under 10nits.

[thirdmoon]

My previous try for SDR to HDR was too dark. After a lot of trial and error, I have come up with this.

Children of Men 2006 - 1080p to 4K HDR (First 10mins)
https://drive.google.com/drive/folders/ ... sp=sharing

[simonhazel00]

hello I've done some testing for dolby vision on devices for you reset.

toshiba 55UA3D63DB:

it supports profile 5, profile 8.1 in mp4 and mkv.

it playes the p7 fel st-dl and DT-Dl test clips and shows the text, brightness changes, but not the colours strobing and dolby vision isn't triggered either in ts or mp4.

the ts st-dl fel test track didn't show the brightness change, the strobing or the text and didn't show the dv logo

dune hd homatics box 4k plus:
unsure if this box has the fake TV led dolby vision issue however.

source led mode:
profile 7 fel
st-dl ts & mp4:
brightness change, strobing and text appeared correctly and triggered dv
DT-Dl ts:
brightness change, text appeared and dv triggered (no colour strobe)
DT-Dl mp4:
brightness change, colour strobing, text and dv logo

profile 8.1 works correctly in mp4 and mkv
profile 5 works correctly in mp4

player led mode:
profile 7 fel:
st-dl ts:
brightness change, colour strobing, text and dv logo
DT-Dl ts:
text and dv logo
st-dl and dt-dl mp4 :
brightness change, colour strobing, text and dv logo

profile 5 works in mp4 and 8.1 works correctly in mp4 and mkv.

unfortunately my TV doesn't have the hidden menu to look any further then that.

[RESET_9999]

My previous try for SDR to HDR was too dark. After a lot of trial and error, I have come up with this.

Children of Men 2006 - 1080p to 4K HDR (First 10mins)
https://drive.google.com/drive/folders/ ... sp=sharing

Yes that's better than your sample from the other day. here's the original vs your conversion plot: https://slow.pics/c/81IGyAYq

I did this movie a while ago and IIRC, the BD SDR grade is not very good.
You'll notice that the SDR to HDR conversion works much better when the SDR grade is decent.

hello I've done some testing for dolby vision on devices for you reset.

toshiba 55UA3D63DB:

it supports profile 5, profile 8.1 in mp4 and mkv.

it playes the p7 fel st-dl and DT-Dl test clips and shows the text, brightness changes, but not the colours strobing and dolby vision isn't triggered either in ts or mp4.

the ts st-dl fel test track didn't show the brightness change, the strobing or the text and didn't show the dv logo

dune hd homatics box 4k plus:
unsure if this box has the fake TV led dolby vision issue however.

source led mode:
profile 7 fel
st-dl ts & mp4:
brightness change, strobing and text appeared correctly and triggered dv
DT-Dl ts:
brightness change, text appeared and dv triggered (no colour strobe)
DT-Dl mp4:
brightness change, colour strobing, text and dv logo

profile 8.1 works correctly in mp4 and mkv
profile 5 works correctly in mp4

player led mode:
profile 7 fel:
st-dl ts:
brightness change, colour strobing, text and dv logo
DT-Dl ts:
text and dv logo
st-dl and dt-dl mp4 :
brightness change, colour strobing, text and dv logo

profile 5 works in mp4 and 8.1 works correctly in mp4 and mkv.

unfortunately my TV doesn't have the hidden menu to look any further then that.

thanks for the tests. But wait the dune hd homatics box 4k plus supports FEL?
is that what you mean by: ''text appeared correctly''

[LV8HD]

Which preset should I be using for Dolby Vision generation?