Bug 117525 – Cues are displayed with the newest on top instead of on the bottom

• Status: RESOLVED
• Resolution: INVALID
• Component: Media

[Brendan Long]

Created attachment 204367 [details]
Screenshot of QtWebKit (built with --video-track) showing cues in opposite of expected order

I'm not sure if this is a WebVTT spec bug or not, but if you play a video with multiple cues, the newest cues will be at the top instead of at the bottom.

For example, if you had a WebVTT file like this:

WEBVTT FILE

00:00:00.000 --> 00:00:10.000
This

00:00:01.000 --> 00:00:10.000
is a

00:00:01.000 --> 00:00:10.000
test.

The cues display on the video would say:

test.
is a
This

To demonstrate this with QtWebKit, you'll need to build with --video-track. It shows up in Safari too (I'll upload a screenshot in just a minute).

The spec is so complicated that I can't tell if this behavior is "correct". If it is, I can take this up on the HTML5 mailing list instead.

[Brendan Long]

Created attachment 204368 [details]
Screenshot of Safari showing cues in opposite of expected order

[Brendan Long]

Created attachment 204369 [details]
Patch

[Jer Noble]

(In reply to comment #0)
> The spec is so complicated that I can't tell if this behavior is "correct". If it is, I can take this up on the HTML5 mailing list instead.

This behavior is (unfortunately) correct.  Cues are moved so as to avoid overlapping in "cue order", which means that the oldest cues will always be on the bottom.

[Build Bot]

Comment on attachment 204369 [details]
Patch

Attachment 204369 [details] did not pass mac-wk2-ews (mac-wk2):
Output: http://webkit-queues.appspot.com/results/791408

New failing tests:
media/track/track-cue-rendering-mode-changed.html
media/track/track-cue-rendering-snap-to-lines-not-set.html
media/track/track-cue-rendering-vertical.html
media/track/track-cue-rendering-horizontal.html

[Build Bot]

Created attachment 204373 [details]
Archive of layout-test-results from webkit-ews-12 for mac-mountainlion-wk2

The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: webkit-ews-12  Port: mac-mountainlion-wk2  Platform: Mac OS X 10.8.3

[Build Bot]

Comment on attachment 204369 [details]
Patch

Attachment 204369 [details] did not pass mac-ews (mac):
Output: http://webkit-queues.appspot.com/results/835140

New failing tests:
media/track/track-cue-rendering-snap-to-lines-not-set.html
media/track/track-cue-rendering-mode-changed.html
media/track/track-cue-rendering-vertical.html
media/track/track-cue-rendering-horizontal.html
fast/repaint/table-cell-collapsed-border-scroll.html

[Build Bot]

Created attachment 204377 [details]
Archive of layout-test-results from webkit-ews-01 for mac-mountainlion

The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: webkit-ews-01  Port: mac-mountainlion  Platform: Mac OS X 10.8.3

[Build Bot]

Comment on attachment 204369 [details]
Patch

Attachment 204369 [details] did not pass mac-ews (mac):
Output: http://webkit-queues.appspot.com/results/767295

New failing tests:
media/track/track-cue-rendering-snap-to-lines-not-set.html
media/track/track-cue-rendering-mode-changed.html
media/track/track-cue-rendering-vertical.html
media/track/track-cue-rendering-horizontal.html
fast/repaint/table-cell-collapsed-border-scroll.html

[Build Bot]

Created attachment 204382 [details]
Archive of layout-test-results from webkit-ews-05 for mac-mountainlion

The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: webkit-ews-05  Port: mac-mountainlion  Platform: Mac OS X 10.8.3