Page 1 of 1

4K UHD conversion.

Posted: Thu Jun 27, 2019 6:24 am
by philb1701
Description of problem or question:

Is Handbrake currently supporting UHD conversion?


Steps to reproduce the problem (If Applicable):




HandBrake version (e.g., 1.0.0):




Operating system and version (e.g., Ubuntu 16.04 LTS, macOS 10.13 High Sierra, Windows 10 Creators Update):




HandBrake Activity Log ***required*** (see How-to get an activity log)

Code: Select all

Please replace this text with the contents of your log file between the two code tags - OR -  provide a pastebin URL in place of these 3 lines.

Re: 4K UHD conversion.

Posted: Thu Jun 27, 2019 9:53 am
by video.baba
Yes

Re: 4K UHD conversion.

Posted: Thu Jun 27, 2019 1:17 pm
by Woodstock
While handbrake will compress the file, there are issues with mapping High Dynamic Range colors.

Re: 4K UHD conversion.

Posted: Tue Aug 13, 2019 5:47 am
by philb1701
So then Handbrake really doesn't transcode 4K videos properly yet, if it has issues with mapping HDR colors.

Re: 4K UHD conversion.

Posted: Tue Aug 13, 2019 1:06 pm
by Woodstock
If you look at it that way, it can't do any video, because HDR can be applied to any resolution.

Re: 4K UHD conversion.

Posted: Tue Aug 13, 2019 6:31 pm
by JohnAStebbins
HandBrake properly passes through the color characteristics, but does not pass through metadata that is used by monitors/TVs to optimize how they map colors when the display does not support the full HDR color gamut.

"HDR capable TV" is really a misnomer. The TV really isn't HDR capable. I.e. It can't show the full color gamut on the display all at once. "HDR capable" means it knows how to read the metadata and optimize what colors it displays for each frame to give the best reproduction it is capable of.

So HandBrake's output is technically correct (i.e. colors are represented mathematically correctly). But since pretty much no monitor can reproduce the full HDR color gamut, the reproduction without the metadata won't be the same as the reproduction with the metadata.