[wp-trac] [WordPress Trac] #42919: Unable to upload files with the AAC extension

[WordPress Trac]

#42919: Unable to upload files with the AAC extension
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 Reporter:  desrosj                  |       Owner:  desrosj
     Type:  defect (bug)             |      Status:  reopened
 Priority:  normal                   |   Milestone:  5.0
Component:  Media                    |     Version:  2.5
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:
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Changes (by desrosj):

 * status:  closed => reopened
 * resolution:  fixed =>


Comment:

 Reopening this for two reasons.

 1. The original intention of the ticket was to allow users to upload a
 file with the `.aac` extension. Uploading a file with the `aac` mime type
 was allowed, but only if it was used in an MP4 container. This is a bug
 fix, and I think that the fix in [attachment:42919.diff] should be
 backported to the `4.9` branch.

 2. r42697 also adds support to the media player for `.aac` files. This
 does not work in FireFox, though (https://caniuse.com/#search=aac). The
 player will draw correctly, but the media will not play. Because of this,
 I think that part of the commit should be reverted.

 We talked this over in this week's Media chat, and there was agreement
 that if a format is explicitly supported for use in the editor and within
 embeds, there should not be any bad user experiences.

 @SergeyBiryukov wanted to follow up to see if there was something we
 missed or if there was a reason you added that.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42919#comment:11>
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