From what I've gathered, 4k content must be in mp4 format, H265, and be 10 bit in order to direct play in Plex for Xbox One S (please correct me if this is wrong).
*If you have content in H264, is there a recommended guide for converting to H265 that's compatible with Plex on Xbox One S?
I've looked into a variety of Handbrake builds with special DLLs, but have been unsuccessful in getting that app to convert. It seems like the Windows GUI version crashes for some reason, so the command line method is needed, but it's unclear what specific settings are needed to make the file compatible for this situation in Plex.
Appreciate any guidance and direction that can be provided. It seems like most of what I've found isn't specific enough to this scenario and/or it's ultimately trying to push some other 3rd party apps to take care of the conversion.