Bug 160959 - Audio HLS + WebVTT player error
Summary: Audio HLS + WebVTT player error
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Media (show other bugs)
Version: WebKit Nightly Build
Hardware: Mac OS X 10.11
: P2 Critical
Assignee: Nobody
Depends on:
Reported: 2016-08-18 08:56 PDT by Francesco
Modified: 2016-08-18 12:51 PDT (History)
4 users (show)

See Also:

player error (31.94 KB, image/png)
2016-08-18 08:56 PDT, Francesco
no flags Details

Note You need to log in before you can comment on or make changes to this bug.
Description Francesco 2016-08-18 08:56:53 PDT
Created attachment 286370 [details]
player error

We have a problem with audio files streamed by Wowza 4 using HLS protocol, when we add VTT file. It doesn't works with Safari on Mac and iOS. 
The file is an .m4a with aac codec. 

1. create html page with video tag, add HLS with m4a source
2. add crossorigin="anonymous" properties
3. add track tag with vtt file
demo: http://www.fdambrosio.net/test/player7/safari-bug.html

We expect that it play audio with subtitles control button but player return "error" message, don't play audio and don't show subtitles. There's no error on Safari Console. 

Tested with: 
latest webKit release (11601.6.17, r204592) and Safari 9.1.1 on OSX 10.11.5
Safari on iOS 9.3.4 (iPhone 5S / iPhone6S)

Note: there's no issue using HLS stream with mp4 video file and vtt. Problem occurs only with audio HLS stream.
Comment 1 Eric Carlson 2016-08-18 12:51:01 PDT