[Bug 34456] ac3 audio file's mime-type not detected

[Tristan Wibberley]

Public bug reported:
https://launchpad.net/malone/bugs/34456

Affects: nautilus (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
I have an ac3 audio file which is detected correctly by the file
command, but nautilus doesn't recognise it:

$ file bar
bar: ATSC A/52 aka AC-3 aka Dolby Digital stream, 48 kHz,, complete main (CM) 3 front/2 rear, LFE on,, 448 kbit/s reserved Dolby Surround mode

while in nautilus, I am only offered to open it with an audio player if
the last four characters of the filename are ".", "a", "c", and "3", in
that order.

I haven't included the file as I do not have an appropriate
redistribution license.