Dolby Vision now possible through MP4 Mux.

[RESET_9999]

oh, I see. I thought you were talking about the cpm update.

[settlefair]

Hi, could anyone please help me answering some questions regarding Dolby Vision.
I would like to keep/encode my UHD discs in p7 with the EL.

However I would like to reduce the file size of the BL stream to around 20GB (instead of 60/80GB).
Does the EL still work if I re-encode the BL with x265? Can the 12bit image only be reconstructed with an original pixel perfect BL?

When I am not watching on my TV/Ugoos, I watch on my Computer with a 21:9 display. Until now, I always cropped the black bars away on all of my encodes. Can I re-encode the BL and/or EL with x265 and crop the black bars or will this also result in a failed reconstruction of the DV image?

After reading through most of the docs and posts about DV, I am still uncertain about those two questions and I appreciate any input.

[RESET_9999]

No you can't keep the EL if you re-encode the BL, but you can bake the EL(and crop) into the BL with dovi_baker(workflow 8-2-1 in my scripts)

[deadchip12]

oh, I see. I thought you were talking about the cpm update.

Tested the DV full black video file. It was not black on my sony a95l. I had to go to 2-pt white balance setting of the tv and dial RGB-bias to minus 4 in order for it to become true black. If you know a better way using the Ugoos or dovi_script, kindly let me know.

Btw, with the latest A14 cpm build, what should I set L5, L6 and Restrict overlays to? They are currently set to Source, Source and Off respectively. I have watched a few films with subtitles and haven't seen any issues.

[RESET_9999]

oh, I see. I thought you were talking about the cpm update.

Tested the DV full black video file. It was not black on my sony a95l. I had to go to 2-pt white balance setting of the tv and dial RGB-bias to minus 4 in order for it to become true black. If you know a better way using the Ugoos or dovi_script, kindly let me know.

Btw, with the latest A14 cpm build, what should I set L5, L6 and Restrict overlays to? They are currently set to Source, Source and Off respectively. I have watched a few films with subtitles and haven't seen any issues.

All normal then. LG TVs too, have raised black without the RGB trick. My C2 need -2 to get perfect black. My old C8, not even -6 worked, had to use contrast 49 IIRC.
if your TV has a semi-transparent mask for L5, you can leave it to ''source''. Thtas what I do on mine.

[settlefair]

Thanks for the quick reply.
I looked at the dovi_baker GitHub, what kind of file do I get out of the process?
It mentions "baked into a PQ12 output stream"/"HDR PQ stream", what kind of stream is that and can Kodi play it back? What kind of picture mode will be signalled to the TV? DV or HDR?

Am I baking dynamic brightness and color data into the stream, that usually my TV would dynamically adjust on runtime like max brightness of the TV and will I therefore reduce the HDR quality on a future, possibly better TV?

There will be no SDR stream anymore, is this correct?
So I will have to be really certain that all of my devices support HDR or have HDR to SDR conversion.

Would you use this approach?

[RESET_9999]

the dovi_baker output is 16bit RGB and contain 100% the 12bits essence. The dynamic metadata(tone mapping) is not applied by default.

Then you have to encode the 16bit RGB stream into a regular HDR10 10bit YUV stream with a P7 to P8 original RPU metadata.

my script does all of this automatically.

Thanks for the quick reply.
I looked at the dovi_baker GitHub, what kind of file do I get out of the process?
It mentions "baked into a PQ12 output stream"/"HDR PQ stream", what kind of stream is that and can Kodi play it back? What kind of picture mode will be signalled to the TV? DV or HDR?

Am I baking dynamic brightness and color data into the stream, that usually my TV would dynamically adjust on runtime like max brightness of the TV and will I therefore reduce the HDR quality on a future, possibly better TV?

There will be no SDR stream anymore, is this correct?
So I will have to be really certain that all of my devices support HDR or have HDR to SDR conversion.

Would you use this approach?

[daffie]

oh, I see. I thought you were talking about the cpm update.

Tested the DV full black video file. It was not black on my sony a95l. I had to go to 2-pt white balance setting of the tv and dial RGB-bias to minus 4 in order for it to become true black. If you know a better way using the Ugoos or dovi_script, kindly let me know.

Btw, with the latest A14 cpm build, what should I set L5, L6 and Restrict overlays to? They are currently set to Source, Source and Off respectively. I have watched a few films with subtitles and haven't seen any issues.

All normal then. LG TVs too, have raised black without the RGB trick. My C2 need -2 to get perfect black. My old C8, not even -6 worked, had to use contrast 49 IIRC.
if your TV has a semi-transparent mask for L5, you can leave it to ''source''. Thtas what I do on mine.

My LG G1 has no raised black with your test file when using brightness level 49. If going higher than 49 the blacks get raised.

[RESET_9999]

My LG G1 has no raised black with your test file when using brightness level 49. If going higher than 49 the blacks get raised.

Dont change the contrast/brightness; it affects the colors/hue. Instead, go in the white balance settings, set it to low 2pts, and decrease RGB until the glow is gone. My C2 needed -2 -2 -2

[daffie]

My LG G1 has no raised black with your test file when using brightness level 49. If going higher than 49 the blacks get raised.

Dont change the contrast/brightness; it affects the colors/hue. Instead, go in the white balance settings, set it to low 2pts, and decrease RGB until the glow is gone. My C2 needed -2 -2 -2

Thanks.
Will changing brightness just slightly from 50 to 49 have a big impact on the colors/hue?

Edit: had to set RGB to - 6 - 6 - 6 to get perfect blacks with brightness at level 50 instead of 49.

So this - 6 on all RGB channels is actually "better" than changing brightness from level 50 to level 49?
Can you explain this?

[RESET_9999]

I'm no expert about this but yes, it is better to change the white balance. Maybe @chros will chime in, he's the expert.

[coopzr]

Thanks.
Will changing brightness just slightly from 50 to 49 have a big impact on the colors/hue?

I'm no expert about this but yes, it is better to change the white balance. Maybe @chros will chime in, he's the expert.

@daffie may be referring to these 'optimized settings' maintained by P40L0. I use these settings too. I haven't tested the validity of whether these settings are better, however, I have seen much community praise and endorsement for their settings, and it is frequently updated, so I trust it.

EDIT 16/05/2025
These settings suck! Completely and utterly destroy the accuracy of colors and brightness. Avoid.

[daffie]

Thanks.
Will changing brightness just slightly from 50 to 49 have a big impact on the colors/hue?

I'm no expert about this but yes, it is better to change the white balance. Maybe @chros will chime in, he's the expert.

@daffie may be referring to these 'optimized settings' maintained by P40L0. I use these settings too. I haven't tested the validity of whether these settings are better, however, I have seen much community praise and endorsement for their settings, and it is frequently updated, so I trust it.

Yes, I am using the settings from P40L0 for my LG G1. I see he did some small new changes when looking at the corresponding file on Patriot. Colour was warm 50 but is now changed to warm 45 for example.

So I am a little in doubt if changing brightness from level 49 (P40L0 setting) to level 50 (standard setting) and instead doing -6 on all RGB channels is better in terms of overall quality on Dolby Vision content. Hope @chros can say something about this?

@RESET_9999 do you really go with your nose up on the screen to test the brightness with that video - or do you test it by sitting at your regular seating position?
When going with my nose up the screen I have to set the RGB levels a little lower obviously.. (-6) That is why I am asking. Thanks!

[RESET_9999]

Yes, I am using the settings from P40L0 for my LG G1. I see he did some small new changes when looking at the corresponding file on Patriot. Colour was warm 50 but is now changed to warm 45 for example.

So I am a little in doubt if changing brightness from level 49 (P40L0 setting) to level 50 (standard setting) and instead doing -6 on all RGB channels is better in terms of overall quality on Dolby Vision content. Hope @chros can say something about this?

@RESET_9999 do you really go with your nose up on the screen to test the brightness with that video - or do you test it by sitting at your regular seating position?
When going with my nose up the screen I have to set the RGB levels a little lower obviously.. (-6) That is why I am asking. Thanks!

I don't have to guess my settings based on some website or guy. I paid big money to have my C2 professionally calibrated and there is no setting such as ''screen brightness'' in my DV filmmaker mode.
You told me in a private message that you were using the ''cinema home'' mode, so right away, this is wrong, and this mode is inaccurate. Also, warm 50 is the accurate setting, not 45.

As for the raised black fix through the white balance, I know and trust @chros more than anyone.
https://github.com/chros73/bscpylgtv

[daffie]

Yes, I am using the settings from P40L0 for my LG G1. I see he did some small new changes when looking at the corresponding file on Patriot. Colour was warm 50 but is now changed to warm 45 for example.

So I am a little in doubt if changing brightness from level 49 (P40L0 setting) to level 50 (standard setting) and instead doing -6 on all RGB channels is better in terms of overall quality on Dolby Vision content. Hope @chros can say something about this?

@RESET_9999 do you really go with your nose up on the screen to test the brightness with that video - or do you test it by sitting at your regular seating position?
When going with my nose up the screen I have to set the RGB levels a little lower obviously.. (-6) That is why I am asking. Thanks!

I don't have to guess my settings based on some website or guy. I paid big money to have my C2 professionally calibrated and there is no setting such as ''screen brightness'' in my DV filmmaker mode.
You told me in a private message that you were using the ''cinema home'' mode, so right away, this is wrong, and this mode is inaccurate. Also, warm 50 is the accurate setting, not 45.

As for the raised black fix through the white balance, I know and trust @chros more than anyone.
https://github.com/chros73/bscpylgtv

You have a C2 I have a G1. Some things are different. I don't have a filmmaker mode for DV. I have a ''Cinema'' and ''Cinema Home'' mode for DV.
These settings from P40L0 are not just some ''settings from a random guy on the internet''. As told already by another user above, they are pretty well regarded as very good all round settings for NON CALIBRATED displays.

Of course when you have your screen calibrated it is not good to take over someone his settings. I understand that.

I changed ''Cinema'' mode to brightness at 50 + RGB white point -5. Will watch some movies like that and see if I notice a difference.
I noticed immediately that ''Cinema'' mode is darker compared to ''Cinema Home''.

For testing the full black screen video - do you judge it really close up or just by sitting at your regular seating position??

Thanks again!