HEVC Decoding in Xbox Edge

What version of Hls.js are you using?

v1.6.5

What browser (including version) are you using?

Microsoft Edge 134.0.3124.54 (Official build) (64-bit)

What OS (including version) are you using?

Xbox OS 10.0.26100.4855

Test stream

https://hlsjs.video-dev.org/demo/?src=https%3A%2F%2Fstarlight.nebula.tv%2Funauthenticated%2Fvideos%2Fcf19ef9c-f7d5-48d9-92f7-d8419fdac086%2Fvideo_upload%3Add0165d4-07f1-44fa-ad35-5a4819cdb33d%2Fall.31d3ecfd653e.m3u8&demoConfig=eyJlbmFibGVTdHJlYW1pbmciOnRydWUsImF1dG9SZWNvdmVyRXJyb3IiOnRydWUsInN0b3BPblN0YWxsIjpmYWxzZSwiZHVtcGZNUDQiOmZhbHNlLCJsZXZlbENhcHBpbmciOi0xLCJsaW1pdE1ldHJpY3MiOi0xfQ==

Configuration

{
  "debug": true,
  "enableWorker": true,
  "lowLatencyMode": true,
  "backBufferLength": 90
}

Additional player setup steps

Edge on Xbox Series S|X reports hvc1 as supported when using MediaSource.isTypeSupported, but the playback fails with DECODER_ERROR_NOT_SUPPORTED: video decoder initialization failed with DecoderStatus::Codes::kUnsupportedConfig

FWIW, VideoElement.canPlayType accurately reports that the codec isn't supported: https://lf-tk-sg.ibytedtos.com/obj/tcs-client-sg/resources/video_demo_hevc.html

Checklist

• The issue observed is not already reported by searching on Github under https://github.com/video-dev/hls.js/issues
• The issue occurs in the stable client (latest release) on https://hlsjs.video-dev.org/demo and not just on my page
• The issue occurs in the latest client (main branch) on https://hlsjs-dev.video-dev.org/demo and not just on my page
• The stream has correct Access-Control-Allow-Origin headers (CORS)
• There are no network errors such as 404s in the browser console when trying to play the stream

Steps to reproduce

1. Load https://hlsjs.video-dev.org/demo/?src=https%3A%2F%2Fstarlight.nebula.tv%2Funauthenticated%2Fvideos%2Fcf19ef9c-f7d5-48d9-92f7-d8419fdac086%2Fvideo_upload%3Add0165d4-07f1-44fa-ad35-5a4819cdb33d%2Fall.31d3ecfd653e.m3u8&demoConfig=eyJlbmFibGVTdHJlYW1pbmciOnRydWUsImF1dG9SZWNvdmVyRXJyb3IiOnRydWUsInN0b3BPblN0YWxsIjpmYWxzZSwiZHVtcGZNUDQiOmZhbHNlLCJsZXZlbENhcHBpbmciOi0xLCJsaW1pdE1ldHJpY3MiOi0xfQ== in Edge on Xbox Series S|X

Expected behaviour

HLS.js detects that HEVC can't be played and plays AVC stream

What actually happened?

HLS.js tries to decode HEVC and fails the playback

Console output

Unable to access browser console on my Xbox

Chrome media internals output

Start by reproducing the stream in the Hls.js demo on Edge for Xbox and compare MediaSource.isTypeSupported with VideoElement.canPlayType for HEVC. Trace the codec selection and fallback entry points from the demo configuration; done means unsupported HEVC is detected and the AVC stream plays instead.