[Webkit-unassigned] [Bug 190085] New: [MSE] Use tolerance when growing the coded frame group

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190085

            Bug ID: 190085
           Summary: [MSE] Use tolerance when growing the coded frame group
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aboya at igalia.com

This patch introduces a millisecond tolerance in the range of
potential frames that should be erased frame from the track buffer
when the coded frame group is growing.

This is necessary because some files have imprecise overlapping
timestamps (especially WebM files).

This fixes a stall when seeking back and forth in YouTube with WebM
video.

A test case simulating the problem with video/mock using timestamps
similar to those of a typical 30 fps WebM video is also added.

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