Fragmented WebVTT and Sidecar WebVTT are displayed double in Chrome/Firefox, broken on Edge
Created by: unifiedstreaming
Environment
-
The MPD passes the DASH-IF Conformance Tool on http://dashif.org/conformance.html -
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 -
The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ -
The issue occurs in the latest reference client on http://reference.dashif.org/dash.js/ and not just on my page
- Link to playable MPD file: http://demo.unified-streaming.com/video/tears-of-steel/tears-of-steel-wvtt.ism/.mpd
- Dash.js version: 2.8.0
- Browser name/version: Edge, Chrome 64bit 67.0.3396.99, Firefox 64bit 60.0.2
- OS name/version: Windows 10 10.0.17134.112
Steps to reproduce
- Please provide clear steps to reproduce your problem
- If the bug is intermittent, give a rough frequency if possible
Bug happens every time
Observed behaviour
Chrome and Firefox display same behavior. "de" subtitles chosen by default, which are displayed double. Selecting a different language shows the subtitle correctly.
For Edge, shows first subtitles then shows no subtitles past 0:25.
It seems that the player loads both sidecar wvtt files as well as the fragmented wvtt and breaks initialization.
Related issue: https://github.com/Dash-Industry-Forum/dash.js/issues/2529 still apparent in 2.8.0
