20064 2012-11-23 15:35:12 +0000 Technique used to determine support for mp4 or webm in track test is faulty 2012-11-23 15:35:12 +0000 1 1 1 Unclassified HTML WG testsuite unspecified PC All NEW P2 normal --- 1 graouts dave.null mike public-html-wg-issue-tracking public-html-bugzilla oldest_to_newest 78703 0 graouts 2012-11-23 15:35:12 +0000 See the test at http://w3c-test.org/html/tests/submission/Opera/media/interfaces/TextTrack/activeCues.html. It contains the following code to determine the <video> src to be used on line 101: video.src = '../../resources/media/sunflower.' + (video.canPlayType('video/webm') ? 'webm' : 'mp4'); This isn't a very robust approach as .canPlayType('video/webm') returns "maybe" on a WebKit nightly when webm is not actually supported, but the string "maybe" evaluates to "true" as a JS condition, and thus the WebM file is used. The test should be rewritten such that it either: 1. uses <source> elements to let the browser pick the suitable resource 2. checks that .canPlayType() returns "probably" to assume that the tested type can be played.