Playback Error - Client isn't compatible

[Daniel_King]

How is this transcoding thing in general working, on what is it depending if something needs to be transcoded or not?
I thought if a video can be played natively on the device, Jellyfin should also be able to stream it without transcoding, or is this a wrong assumption?

One of my video files which can be played natively but won't work without transcoding on Jellyfin:


Playback Info
Player: Html Video Player
Play method: Transcoding
Protocol: http
Stream type: HLS

Video Info
Player dimensions: 3840x1981
Video resolution: 3840x2160
Dropped frames: 1
Corrupted frames: 0

Transcoding Info
Video codec: H264
Audio codec: AAC
Audio channels: 2
Bitrate: 63.1 Mbps
Transcoding progress: 0.9%
Transcoding framerate: 30 fps
Reason for transcoding:
The video codec is not supported
The audio codec is not supported

Original Media Info
Container: webm
Size: 74.2 GiB
Bitrate: 67.7 Mbps
Video codec: HEVC Main 10
Video bitrate: 62.7 Mbps
Video range type: HDR10
Audio codec: TRUEHD
Audio bitrate: 4.2 Mbps
Audio channels: 8
Audio sample rate: 48000 Hz
Audio bit depth: 24


If the audio is getting transcoded I don't mind, I just would like to get the raw video stream.