Bug 79791 – Setting mode for track element not working

• Component: Media
• Status: RESOLVED FIXED

[Sam Dutton]

Created attachment 129249 [details]
Screenshot showing default rendering of track subtitles, though mode set to TextTrack.HIDDEN

Simple example:

http://html5-demos.appspot.com/static/video/track

Expected behaviour: default subtitles should not be rendered:

var track = video.textTracks[0];
track.mode = TextTrack.HIDDEN;

What actually happens: subtitles rendered over video.

Likewise, in track.js on 

http://www.samdutton.com/track

I attempt to set the mode of the metadata track to 1 (TextTrack.HIDDEN). This is the track used for the text in the right hand box.

Also doesn't work from Chrome Dev Tools. Try the following from the Dev Tools console: 

    document.querySelector("video").textTracks[1].mode = TextTrack.HIDDEN

According to the spec, it should be possible to change the text track mode: http://dev.w3.org/html5/spec/video.html#texttrack.

(BTW: I'm pretty sure setting mode worked OK in Chrome ??18.)

See also http://code.google.com/p/chromium/issues/detail?id=113413

[Anna Cavender]

I believe the problem is that when the mode is set, m_showingByDefault remains true, when really it should be set to false.  Patch coming shortly.

[Anna Cavender]

Created attachment 135231 [details]
fixes problem, needs tests

[Eric Carlson]

This change looks OK, but we should have the test in the same patch.

[Anna Cavender]

Created attachment 135405 [details]
including tests

[Eric Carlson]

Comment on attachment 135405 [details]
including tests

View in context: https://bugs.webkit.org/attachment.cgi?id=135405&action=review

> LayoutTests/media/track/track-mode.html:16
> +

Nit: this blank line is unnecessary.

[Anna Cavender]

Created attachment 135436 [details]
Patch for landing

[WebKit Review Bot]

Comment on attachment 135436 [details]
Patch for landing

Rejecting attachment 135436 [details] from commit-queue.

Failed to run "['/mnt/git/webkit-commit-queue/Tools/Scripts/webkit-patch', '--status-host=queues.webkit.org', '-..." exit_code: 1

ERROR: /mnt/git/webkit-commit-queue/LayoutTests/ChangeLog neither lists a valid reviewer nor contains the string "Unreviewed" or "Rubber stamp" (case insensitive).

Full output: http://queues.webkit.org/results/12317525

[Anna Cavender]

Created attachment 135450 [details]
Patch for landing

[WebKit Review Bot]

Comment on attachment 135450 [details]
Patch for landing

Clearing flags on attachment: 135450

Committed r113110: <http://trac.webkit.org/changeset/113110>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.