[FFmpeg-user] HDR bt.2020 to SDR bt.709 conversion

[pehache]

Le 22/10/2023 à 01:20, Dennis Mungai a écrit :

> Please provide a sample of the input file and uncut output of the ffmpeg
> command line in use.
> 

Here is a 60 sec. piece of the input video, extracted with
ffmpeg -ss 75 -i in0.mkv -map 0:0 -c copy in1.mkv

http://pehache.free.fr/TEMP/in1.mkv

Here is what it looks like in VLC (this is a macOS screenshot, not from 
the VLC capture tool):
http://pehache.free.fr/TEMP/vlc.png

And what it should look like (natural colors and much more detailed 
shadows):
http://pehache.free.fr/TEMP/web.png

My main problem is the color shift. Playing with the luminosity is not 
that difficult (even simply with the curve filter if needed).


About the ffmpeg text output, I've just cut the irrelevant parts 
(information about audio and subtitle tracks, and about chapters)