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DGHDRtoSDR_1.12
Posted: Tue Feb 18, 2020 4:22 pm
by JoyBell
I am a bit embarrassed about this.
I have finally got a good HDR to SDR conversion using DGHDRtoSDR_1.12 by accident instead of 1.13
You see the light argument finally got the converted SDR to light levels matching original SDR!
I work in stax and this finally after years of trying tools works with good results.
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z_ConvertFormat(pixel_type="YUV420P16",colorspace_op="2020ncl:2020:2020:l=>709:709:709:l", dither_type="None")
DGHDRtoSDR(light=150.0, impl="255", fulldepth=true )
Some shadows are too dark, and I have been desperately looking for the parameters list from the readme or other documentation but I can only find 1.13 information. I am also working on an issue of some content blowing out the sky.
Maybe I am silly but I could not get the white and black arguments in 1.13 to match the results of using light in 1.12 at all.
I'd post image examples but don't want to get anyone in trouble.
P.S. Donald, I owe you a license which I will happily do now that I got it working.
Re: DGHDRtoSDR_1.12
Posted: Tue Feb 18, 2020 5:20 pm
by Rocky
Welcome to the forum and love your avatar! Can you make available a small source clip that I can use to investigate this? There should be a way to duplicate things with 1.13.
Still, your script looks wrong because you should not need any conversion to 709 before DGHDRtoSDR().
DGHDRtoSDR is free but you can certainly make a donation if you like.
Re: DGHDRtoSDR_1.12
Posted: Tue Feb 18, 2020 5:35 pm
by JoyBell
Anyone have that DGHDRtoSDR 1.12 documentation?
Going with in Staxrip:
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DGHDRtoSDR(light=100.0, impl="255", fulldepth=true )
Gives:
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Script Error
DGHDRtoSDR: input must be CS_YUV420P16
Must need the conversion as the Source is YV12 HDR.
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FFVideoSource("\\t02.mkv", colorspace = "YV12", \ cachefile = "C:\t02.ffindex")
All my work is for our home media server. Is it ok to link images and or short clips of content to here? I don't want to break any forum rules.
Re: DGHDRtoSDR_1.12
Posted: Tue Feb 18, 2020 8:18 pm
by Rocky
Yes, please link a short unprocessed clip. Images don't help much as I need the video for testing, etc. If it's pr0n send me a link by PM, otherwise you can post it here. Short clips are OK per the fair use clause of copyright.
YV12 HDR is unusual. Where is it coming from?
I posted the 1.12 help file at the other forum.
DGHDRtoSDR_1.12
Posted: Tue Feb 18, 2020 8:52 pm
by JoyBell
Source Clips
https://cdn.discordapp.com/attachments/ ... DR.torrent
I found a small clip of Midway that shows the blown out brights issue:
Bluray SDR
DGHDRtoSDR bright 100
DGHDRtoSDR bright 300
Bright 300 looks good here. But is way too dark on most other content.
These are from a teaser preview of Disneys The Mandalorian:
DGHDRtoSDR bright 300
DGHDRtoSDR bright 100
DGHDRtoSDR bright 50
SDR 1080p Webstream
Shadows are very dark:
DGHDRtoSDR bright 300
DGHDRtoSDR bright 100
DGHDRtoSDR bright 50
SDR 1080p Webstream
Another issue, is if I don't have a SDR source to look at can I even balance at all? I would like to be able to trust blind batch encoding to have decent results. Yes, I understand that HDR is colored differently. I am just looking for brightness and contrast to be reasonable.
I hope this isn't all in my head, but I have looked at these on TV, Laser Projector, Desktop Panel, and Laptop Panel.
Edit: I also notice that the Bluray native always looks more brown, turning down the blue just makes it look green. Can't seem to replicate that aspect either.
I have also tried other available cubemaps and they all look much duller than the DGHDRtoSDR. Good work!
Re: DGHDRtoSDR_1.12
Posted: Wed Feb 19, 2020 6:12 pm
by JoyBell
I got the cube mapped Luts working. This is not a solution at all either.
DGHDRtoSDR looks much more vibrant. This keeps the correct tone but looks washed out and dull AF.
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ConvertBits(16)
ConvertToPlanarRGB()
Cube("C:\Encoder Temp\PQ_to_BT709_v2.cube", cpu=1, fullrange=true)
BT2100_HDR_PQ_to_BT2020_SDR
C-Log3_to_BT709
HLG_to_BT709
PQ_to_BT709_v1
Also all look terrible. But that is for BBencoder.
fullrange=false, shows no image and throws no errors.
Re: DGHDRtoSDR_1.12
Posted: Wed Feb 19, 2020 8:03 pm
by Rocky
Sorry but I don't do torrents. Just use a hosting site with the raw file. If needed I can give you access to my FTP site. Thank you.
dull AF
What is 'AF'?
Re: DGHDRtoSDR_1.12
Posted: Wed Feb 19, 2020 10:06 pm
by JoyBell
AF is slang.
Strongly worded "very" in this case. The converted imaged looks very dull, so much as to invoke crude slang derogatory.
I will get a direct download file link. That was just easy compared to dealing with Mega or something.
Here are server links to the two source file. If you get security just leave blank.
https://bit.ly/2V7TqeY
https://bit.ly/2vRtfyQ