Anyway to tell if phone clients are playing back in HDR vs just Tonemapping to SDR?

[tom80H]

The above screenshot/example doesn’t.
If you’re playing 4K HEVC content, you should see that (as well as if it’s being transcoded.

See another example from a different thread:

Transcoding 4k->4k with HDR tone mapping and nvidia hardware accel crashes server. power off

doesnt look like it has anything to do with HLS, but a few lines down you should see this: no remuxable profile found, so video stream will be transcoded so it seems to be a lack of a “remuxable profile” whatever that means. so uh, can you guys make that? what profile exactly is missing? seems like definitely a limitation in Plex, since the hardware can do it. here you can see another example. with HDR tone mapping disabled to prevent the system from crashing. but you see direct play, then…