[Webkit-unassigned] [Bug 221854] New: Cues displayed during end time

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221854

            Bug ID: 221854
           Summary: Cues displayed during end time
           Product: WebKit
           Version: Safari 14
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joeyparrish at google.com

Created attachment 420187

  --> https://bugs.webkit.org/attachment.cgi?id=420187&action=review

A simple page (45 lines) to repro the issue

Safari version 14

What steps will reproduce the problem?
(1) Open the attached HTML repro case (45 lines total)
(2) Optional: observe the sequence of events in the dev console logs

What is the expected result?

The repro page will insert two cues (1-2s and 2-3s), then seek to exactly 2s.
Only one cue should be displayed at time 2s (the second one).

What happens instead?

In Chrome/Edge 88 and Safari 14, both are displayed at once.  In Firefox 84, only the second cue is displayed (correct behavior).


Additional context:

It recently was pointed out to us in Shaka Player that our DOM-UI-based cue display got this wrong, too.  The fix turned out to be a single character (> instead of >=).  You may find something similar in WebKit.  https://github.com/google/shaka-player/pull/3152/files

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