4K UHD playback on Theatre / Win10 playback question

[LACEmby 0]

Learning the new ropes with 4K content - am experienced with SD / HD content.

Successfully coded 12 Monkeys using HEVC-10 (NvEnc - nice and fast) at CQ 20 into MKV container, then put into Emby server. Server finds it no problem.

Emby app on LG TV consistently freezes with original passthru DTS track, but is fine with a transcoded DTS>AC3 track. OK - that's not a problem, I can just transcode audio while doing the main compression. Emby LG app correctly identifies UHD HDR content for playback - shows correct colouring (more or less). Plays fine (other than DTS glitch).

Emby Theatre on Win10 plays back with the DTS fine - but it's obviously a completely different gamut. Snow scenes are very dark blue rather than pale blue hue as per separate FHD BD copy or LG playback of new UHD HDR version).

Emby Theatre Win10 doesn't seem to pick up that it's HDR and handle correctly... am I missing something? Is there a way to tell Theatre Desktop to handle HDR content by tonemapping?

Edited July 30, 2024 by LACEmby
correction of detail

[Luke 39333]

Hi, did you enable HDR in windows settings?

[LACEmby 0]

Thanks for input, Luke - upon double checking, none of my displays list as HDR capable (Dell U2413 Dell U3824DW). No surprise really then that Theatre can't display full dynamic range.

Is there a way of tonemapping Theatre's output to achieve similar?

It now looks like the only real option to compress a 2nd version for viewing exclusively with Theatre Desktop, with maybe Rec709 gamut. Seems a bit daft....

[generiq 245]

video output = gpu-next