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IDProjectCategoryView StatusDate SubmittedLast Update
0002355DCP-o-maticFeaturespublic2022-10-17 23:252024-01-08 20:59
Reportercarl Assigned Tocarl  
PrioritynormalSeverityminorReproducibilityN/A
Status acknowledgedResolutionopen 
Target Version2.18.x 
Summary0002355: Add a tonemapping filter to make Rec.2020 sources look better
Description

I'm not sure if this is necessary (or even a good idea) but let's see if we can find somebody to test some Rec2020 material and see.

TagsNo tags attached.
Branch
Estimated weeks required
Estimated work required

Relationships

related to 0002318 closedcarl Messed up colours with "HDR" yuv420p10le source 
related to 0002287 acknowledgedcarl Support UHD BluRay / HDR 

Activities

carl

2022-10-23 20:32

administrator   ~0005274

Tester has used a 4K Barco projector, and compared HDR sources with HDR sources converted to SDR with FFmpeg:

ffmpeg -i INFILE -map 0:0 -map 0:1 -vf zscale=t=linear,tonemap=hable,zscale=p=709:t=709:m=709 -c:v hevc_videotoolbox -b:v 70000k -profile:v main10 -c:a copy OUTFILE

and reports that DCPs made from the HDR source are not dark enough and lack saturation (which is similar to what is wrong with the preview).

carl

2022-10-23 20:35

administrator   ~0005275

Also notes that 4K HDR encodes took about twice as long as the SDR ones, which is odd.

Kurville

2023-09-19 18:26

reporter   ~0005953

The FFmpeg conversion that I use now is:
ffmpeg -i INFILE -map 0:0 -map 0:1 -vf zscale=t=linear, tonemap=hable,zscale=p=2020:t=2020_10:m=2020_ncl -c:v hevc_videotoolbox -b:v 70000k -profile:v main10 -c:a copy OUTFILE

And force Rec. 2020 in DOM colour setting.

Colour are better, a bit more saturated and without the slight yellow shift I noticed last year with my initial FFmpeg conversion.

Bug History

Date Modified Username Field Change
2022-10-17 23:25 carl New Bug
2022-10-17 23:25 carl Assigned To => carl
2022-10-17 23:25 carl Status new => acknowledged
2022-10-17 23:25 carl Relationship added related to 0002318
2022-10-23 20:32 carl Note Added: 0005274
2022-10-23 20:35 carl Note Added: 0005275
2023-09-16 21:17 carl Target Version 2.16.x => 2.18.x
2023-09-19 18:26 Kurville Note Added: 0005953
2024-01-08 20:59 carl Relationship added related to 0002287