My issue is different from the other threads here, because I’m able to play original streams of x265 at 65Mbps for a short time. Would like an update of X265 playback on Xbox1S. I have remuxed several movies into lossless mkv’s, and am able to play them for about 30 seconds on “original” quality without transcoding the video, for 30 seconds.
Then the movie will buffer and quality will switch to “Convert to 4K (Maximum) 65Mbps”. My network is all 1Gbps, and I’m able to get 50MB/s between the plex server and the network storage.
I don’t care that the Audio track is transcoding right now, 5.1 is just fine. I also don’t have any issues with H264 AVC direct play video.
What you are reporting sounds like what I reported and updated into the known issues thread. Basically the server reports a secondary stream as the primary stream so when the app tries to playback the audio the media player crashes (It can’t handle playing audio that is not the first audio track), the crash is detected by the app and the app then falls back into transcoding.
The only way to be sure is to see the server logs during playback and mediainfo for one of the files causing the problem to verify what is actually occuring.
The audio track transcoding means that you are going to run into issues. One of microsoft fixes released does prevent the app from reaching the buffering deadlock, but the media player still crashes and the app then falls back to transcoding the file because it detects the media player crash. Right now, the only way to fully playback 4K material on the Xbox One is to ensure that all streams (video and audio) both direct play, until the last fix for HEVC streaming is released.
Just for information, if the video does enter transcoding then you will only get back 1080p h264 video. The h264 decoder has issues with 4K material during streaming and so is currently limited to 1080p. The convert 4K just means that it will try and keep the original bit rate/quality but cannot override the device limitations set.
I found that my Google Chromecast Ultra plays 4K HEVC content perfectly with direct stream. The audio is transcoded.
Not my prefered user experience, I want to use a remote, not my phone, but will be ok for now… FYI
The v2.17.1 update should be now rolling out to users, which includes possible performance improvements for streaming 4K media. Please give it a try and let me know if it helps!
