Bug 170131

Summary:	[MSE] readyState doesn't open if the tab is in the background
Product:	WebKit	Reporter:	gregory marcilhacy <marcilha>
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Major	CC:	ap, eric.carlson, jer.noble, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 10
Hardware:	Mac
OS:	macOS 10.12

gregory marcilhacy

Reported 2017-03-27 13:24:36 PDT

This is a bug with the Media Source Extensions and background tabs in Safari. When attaching a new MediaSource to an Audio element source while the tab is in the background, the 'sourceopen' is never triggered. Repro here: http://jsbin.com/hecohedugo/edit?js,console Actual behavior: - When a MediaSource is attached to an Audio src while the tab is in the background, the readyState is closed until the user focuses on the tab. Expected behavior: - When a MediaSource is attached to an Audio src while the tab is in the background, the readyState should be open.

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Radar WebKit Bug Importer

Comment 1 2017-03-27 17:04:41 PDT

<rdar://problem/31286985>

Eric Carlson

Comment 2 2017-03-29 12:36:23 PDT

WebKit has never allowed a new audio or video element to start in a background tab. Why should MSE be any different?

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