HDR -> SDR conversion
Re: HDR -> SDR conversion
Maybe 10 is a bit too strong. I'll reduce it in the next version.
Re: HDR -> SDR conversion
I slipstreamed 1.11 to reduce default hue to 5. Hopefully, you can live with that. I do think this hue correction is a good thing. If you can show otherwise, please do.
Re: HDR -> SDR conversion
Hi, Donald!
Please give recommendations, how to select the parameter "Prefetch"? What does this parameter affect? Thank's.
Please give recommendations, how to select the parameter "Prefetch"? What does this parameter affect? Thank's.
Re: HDR -> SDR conversion
It's an Avisynth+ thing that you can google. There are so many variables affecting it that your best bet is to use Avsmeter to time your script and empirically determine the best value. For some scripts, any prefetch reduces performance.
Re: HDR -> SDR conversion
Hello Which version of Dgsource (dgdecnv) has parameter "fulldepth"? I use 2053, checked others There's no in manual either.
Re: HDR -> SDR conversion
All versions of DGDecodeNV, for the last great while at least, have the fulldepth instruction
From the manual
From the manual
fulldepth: true/false (default: false)
When fulldepth=true and the encoded video is HEVC 10-bit or 12-bit, then DGSource() delivers 16-bit data to Avisynth with the unused lower bits zeroed. The reported pixel format is CS_YUV420P16. If either of the two conditions are not met, then DGSource() delivers 8-bit YV12 or I420 data, as determined by the i420 parameter. When fulldepth=false and the video is HEVC 10-bit or 12-bit, then the video is dithered down to 8-bit for delivery. If you need a reduced color space (less than 16 bits) for your high-bit-depth processing, you can use ConvertBits() as needed after your DGSource() call.
Re: HDR -> SDR conversion
I try to use it in Avspmod 2.5.1 and get a script error: dgsource does not have a named argument "fulldepth".
Re: HDR -> SDR conversion
Your version is too old, update dgdecodenv.dll.
PC: RTX 2070 | Ryzen R9 5950X (no OC) | 64 GB RAM
Notebook: RTX 4060 | Ryzen R9 7945HX | 32 GB RAM
Notebook: RTX 4060 | Ryzen R9 7945HX | 32 GB RAM
Re: HDR -> SDR conversion
Thanks! I've been using first 2053 version Now it works great.
Re: HDR -> SDR conversion
https://nvidianews.nvidia.com/news/nvid ... rcomputingDion wrote: ↑Thu Sep 13, 2018 1:00 amHave you ever considered making an HDR to SDR app for the Nvidia Shield? It has an Nvidia GPU in it and one thing it lacks is an HDR to SDR app that can hook onto Plex or Kodi or some other popular video apps.
Could even charge for it an probably make some decent bank.
Maybe useful for this? I'm not a dev so maybe you could comment.
Re: HDR -> SDR conversion
Thanks for the suggestions, guys. I need to make a DGHDRtoSDR() update and then I can look at this stuff.
Do you feel GOOOD? Say YEAH! Wheee.
Do you feel GOOOD? Say YEAH! Wheee.
Re: HDR -> SDR conversion
great filter!
i'm very looking forward to the HLG2SDR function.
i'm very looking forward to the HLG2SDR function.
Re: HDR -> SDR conversion
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?
Re: HDR -> SDR conversion
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.
Re: HDR -> SDR conversion
I have provided 3 clips, 50MB per clip, thank you for your helpadmin wrote: ↑Tue Sep 03, 2019 8:50 amAny 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.
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
Re: HDR -> SDR conversion
Thank you very much. I will make a proper HLG to SDR filter and see how it compares.
Re: HDR -> SDR conversion
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.
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.
Re: HDR -> SDR conversion
Guys, I have added a 'HDR' field to the HEVC Info dialog. This will show "PQ" for HDR10, "HLG" for HLG, and is blank for SDR.
I also figured out how to properly detect HDR. There are two ways to signal it: 1) through the transfer_characteristics (16 is PQ, 18 is HLG), and 2) through SEI messages. Previously I was looking only at the presence/absence of SEI messages. Now I look at both. You have to look at both because a HLG stream can signal 709 via transfer_characteristics together with a preferred_transfer_characteristics SEI specifying HLG. This allows for backward compatibility of HLG with 709 displays. Refer to T-REC-H.Sup18-201710-I!!PDF-E.pdf for details:
https://www.itu.int/rec/T-REC-H.Sup18-201710-I
Will slipstream it after some regression testing.
I also figured out how to properly detect HDR. There are two ways to signal it: 1) through the transfer_characteristics (16 is PQ, 18 is HLG), and 2) through SEI messages. Previously I was looking only at the presence/absence of SEI messages. Now I look at both. You have to look at both because a HLG stream can signal 709 via transfer_characteristics together with a preferred_transfer_characteristics SEI specifying HLG. This allows for backward compatibility of HLG with 709 displays. Refer to T-REC-H.Sup18-201710-I!!PDF-E.pdf for details:
https://www.itu.int/rec/T-REC-H.Sup18-201710-I
Will slipstream it after some regression testing.
Re: HDR -> SDR conversion
I found the official HD version here:
https://www.youtube.com/watch?v=ih1l6wb7LhU
for these clips:
trim_187.ts at 35:03
trim_203.ts at 38:02
I can't find trim_162.ts in HD version, I think SDR ver. and HDR ver. are different editions.
https://www.youtube.com/watch?v=ih1l6wb7LhU
for these clips:
trim_187.ts at 35:03
trim_203.ts at 38:02
I can't find trim_162.ts in HD version, I think SDR ver. and HDR ver. are different editions.
Re: HDR -> SDR conversion
Thanks but I don't know how to download youtube videos.
- Bullwinkle
- Posts: 338
- Joined: Thu Sep 05, 2019 6:37 pm
Re: HDR -> SDR conversion
Hello there culture lovers. Today we take a look at the modern day HLG to SDR known as The Good Stuff. Here is one fetching picture. They call me fetching. Fetching all the pixels ain't saving whoa! Ooh. Okay that is all for today next week the meaning of Randomness and Beauty.