[Feature Request] Add tone mapping for rendering thumbnails of HDR videos

[Klaus1189]

I have several HDR videos and the generated thumbnails look washed out. Is there already a tone map feature available in Icaros? Of so, please let me know how I can enable it. Otherwise I beg for adding this functionality. It does not have to be super high end tone mapping, just simple, so the picture doesn't look "washed out".