Support forum for DG Tools

Thanks for the testing, gonca!

For comparison
Speed of script is over 128 FPS

admin wrote: ↑

Tue May 22, 2018 4:09 pm

Thanks for the testing, gonca!

The results with gamma look very good to me, might need a dash higher brightness.
But to be honest, no one approach with one set of default settings will be perfect for every source.
Right now we have gamma, Hable, and if the "old" plugin works, Reinhart
It takes very little time to create a script, and index a movie in order to load it into VDub
Then we can adjust settings, or approach, quickly until we get our desired results.
After all, a lot of this is subjective
Set it up to get the results you like

dmcs wrote: ↑

Tue May 22, 2018 3:54 pm

I've got this weird green thing when using Hable in the latest DGHDRtoSDR_1.2.

Please re-download and test again. Should be fixed.

Thanks for pointing this out.

admin wrote: ↑

Tue May 22, 2018 4:30 pm

Please re-download and test again. Should be fixed.

Thanks for pointing this out.

Yay!!! So, may I ask what was that?

I forgot to clip the RGB to >= 0 after the Hable step.

Can the Hable parameters be changed with the new plugin? I'm not sure if I missed something in the readme or not.

Yes. Use parameters exp, a, b, c, d, e, f, and white.

The document mentions w but it should be white. I'll fix that now.

Ah yeah, I should've tried more than just w
Thanks!

Had some time so I ran another test
Same settings and conditions as before

HDRtoSDR2-1 SDR 2-1 HDRtoSDR 2-2 SDR 2-2 HDRtoSDR 2-3 SDR 2-3

Same samples with one change in settings HDRtoSDR 2-1-2 HDRtoSDR 2-2-2 HDRtoSDR 2-3-2

Noticed the same as I can see in your tests, highlights seem to clip to 235 a bit early with tm="gamma"

Thank you, gonca! Very useful as always.

What would really help would be suggestions for better default parameters. I've pretty much picked them arbitrarily, so any guidance from these real use cases would be valuable for setting them more appropriately. Ideally, each mode would work pretty fine out of the box, although tweaking may be required for some sources.

On another matter, does anyone have any 12-bit HDR sources? I know they are possible in theory but I haven't seen any in practice.

For better default settings would be an easy task, but
I can pick an image and vary one setting at a time but it would require some input from others with suggestions, since this a subjective case

Okay, let's start
All samples resized to 1280 x 720 at 8 bits
SDR light=40,gamma=0.40 light=40,gamma=0.45 light=45,gamma=0.40 Please feel free to suggest setting tweaks but let us keep it to one change per so we can better see the effects
If a different clip is desired please let me know the criteria, i.e. light colour etc

Edit
Had a temporary brain freeze

for the next update of the read me:

The input must be YUVP20P16, e.g., from DGSource(fulldepth=true).

YUVP20P16 -> YUV420P16

Selur wrote: ↑

Thu May 24, 2018 7:17 am

YUVP20P16 -> YUV420P16

Fixed, thank you.

I think white=2.5 for Hable is a bit overkill as default, a lot of highlights are overblown, it should be at least 5.
The old default of ~11 was too high

"Better default settings"
light=55,gamma=0.42
SDR image is 1920 x 1080 24 bit, so HDRtoSDR was resized to same
Any suggestions/recommendations for adjustments to settings are welcome


SDR HDRtoSDR SDR HDRtoSDR SDR HDRtoSDR

Hi,

I have trouble loading the plugin DGHDRtoSDR.dll

I am using AviSynth+ 0.1 (r2664, MT, x86_64), with 64bit AvsPmod. I have VC++ redistributable 2005,2008,2010,2012,2013,2017 (x64) installed.

Script:
LoadPlugin("C:\Program Files (x86)\AviSynth+\plugins64+\DGHDRtoSDR.dll")

Error:
Cannot load file 'C:/Program Files (x86)/AviSynth+/plugins64+/DGHDRtoSDR.dll". Platform returned code 126: The specified module could not be found.

I don't have DGDecodeNV and I don't have an nVidia GPU.

Could you please help to locate where is the problem?

Thanks!

douzi wrote: ↑

Fri May 25, 2018 3:33 am

I have trouble loading the plugin DGHDRtoSDR.dll

Greetings douzi and welcome to the forum.

Please re-download and try again, as I have configured nvcuda.dll as delay loading. Of course you need the parameter impl="sw" or you will receive an error. Please advise if it is loading for you.

Be warned that software mode is slow.

To those who have posted samples and suggested new default values: Thank you! Before deciding on the final defaults, which of course will use your input, I am adding a graph feature that will allow the tonemapping curve to be visualized. It should help us both to be more scientific in our conclusions and to more easily know the effects of our parameter settings.

admin wrote: ↑

Fri May 25, 2018 8:49 am

To those who have posted samples and suggested new default values: Thank you! Before deciding on the final defaults, which of course will use your input, I am adding a graph feature that will allow the tonemapping curve to be visualized. It should help us both to be more scientific in our conclusions and to more easily know the effects of our parameter settings.

That would be a great help to hopefully point out small effects

For sure. I have it working and I have already discovered that Hable (with the commonly used parameters) is not doing what we think, it looks like a gamma correction; there is no toe, linear section, and shoulder. I have searched for a user-friendly description of the 8 (!) parameters but not found anything useful, and I haven't been able to find parameters that give the filmic curve. I'm planning to write my own filmic operator with intuitive parameters.