[wp-trac] [WordPress Trac] #61398: Missing src attribute on <audio> tag prevents m4a audio files playing in safari.

[WordPress Trac]

#61398: Missing src attribute on <audio> tag prevents m4a audio files playing in
safari.
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 Reporter:  ericmulder               |       Owner:  joedolson
     Type:  defect (bug)             |      Status:  accepted
 Priority:  normal                   |   Milestone:  6.8
Component:  Media                    |     Version:  6.6
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:
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Comment (by joedolson):

 Did some research on the problem, since I wanted to have a better sense of
 what was going on here. It seems like Safari has a number of historic
 issues around using the `source` attribute, and MediaElement works around
 this by adding the value of the first `source` element as a `src`
 attribute. When MediaElement isn't running, that doesn't happen, and it
 doesn't work.

 The current patch works *if* the m4a file is passed in the `src`
 attribute, but that isn't the case if using the media buttons in the
 inserter, which instead add an `m4a` attribute with the source.

 To support that, we need to assign the primary format extension as the
 'src' attribute.

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Ticket URL: <https://core.trac.wordpress.org/ticket/61398#comment:15>
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