HDR -> SDR conversion

These CUDA filters are packaged into DGDecodeNV, which is part of DGDecNV.
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admin
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Re: HDR -> SDR conversion

Post by admin » Mon Jun 17, 2019 8:32 pm

Thanks for the suggestions, guys. I need to make a DGHDRtoSDR() update and then I can look at this stuff.

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zys4416
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Re: HDR -> SDR conversion

Post by zys4416 » Fri Aug 30, 2019 3:17 am

great filter!
i'm very looking forward to the HLG2SDR function.
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tormento
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Re: HDR -> SDR conversion

Post by tormento » Fri Aug 30, 2019 5:19 am

admin wrote: ↑
Mon Jun 17, 2019 8:32 pm
Do you feel GOOOD? Say YEAH! Wheee.
YEAH! :lol:
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Re: HDR -> SDR conversion

Post by admin » Fri Aug 30, 2019 8:21 am

zys4416 wrote: ↑
Fri Aug 30, 2019 3:17 am
 i'm very looking forward to the HLG2SDR function.
I didn't make one because of the supposed backwards compatibility of HLG. Can you further justify your request?
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Re: HDR -> SDR conversion

Post by admin » Fri Aug 30, 2019 8:23 am

tormento wrote: ↑
Fri Aug 30, 2019 5:19 am
 YEAH! :lol:
Better late than never!
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zys4416
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Re: HDR -> SDR conversion

Post by zys4416 » Tue Sep 03, 2019 5:19 am

admin wrote: ↑
Fri Aug 30, 2019 8:21 am
zys4416 wrote: ↑
Fri Aug 30, 2019 3:17 am
 i'm very looking forward to the HLG2SDR function.
I didn't make one because of the supposed backwards compatibility of HLG. Can you further justify your request?
I have same 2160p 10-bit TS sources in HLG / BT.2020 (mediainfo reported), and I want to re-encode them to 1080p in SDR / BT.709 for archiving.

When I play a TS source, the color looks mostly fine, it seems to be a 4K UHD source.

You mean that I can re-encoding without any filters?
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Re: HDR -> SDR conversion

Post by admin » Tue Sep 03, 2019 8:50 am

Any chance you could give me a link to one of those transport streams? You can use DGSplit to cut the first 50MB. Only you can decide if it looks "good enough" with no special processing. With one of your streams I can try it both ways and we'll see how they compare.
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zys4416
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Re: HDR -> SDR conversion

Post by zys4416 » Wed Sep 04, 2019 10:49 pm

admin wrote: ↑
Tue Sep 03, 2019 8:50 am
 Any chance you could give me a link to one of those transport streams? You can use DGSplit to cut the first 50MB. Only you can decide if it looks "good enough" with no special processing. With one of your streams I can try it both ways and we'll see how they compare.
I have provided 3 clips, 50MB per clip, thank you for your help :D

http://138.68.0.28:8008/trim_162.ts
http://138.68.0.28:8008/trim_187.ts
http://138.68.0.28:8008/trim_203.ts
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Re: HDR -> SDR conversion

Post by admin » Thu Sep 05, 2019 6:24 am

Thank you very much. I will make a proper HLG to SDR filter and see how it compares.
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Re: HDR -> SDR conversion

Post by admin » Thu Sep 05, 2019 6:55 am

This is interesting:

https://www.youtube.com/watch?v=yGSjun9gsbs

It shows that, compared to a proper conversion to SDR 709, playing HLG 2020 directly is "OK" but it is much darker and there are color shifts.

Probably your clips will perform similarly. Seems to me there is indeed a good justification for a new filter.
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