[Bug 56475] Amarok can't play audio after attempting to play a FLAC file

[Dave Suffling]

Public bug reported:

When a flac audio file is next in the queue, the following events happen
(in sequence:)

1. An error message is displayed to the effect of:

Error Loading Media
There is no audio channel!

2. Playback is stopped.

3. Attempting to play other, non-FLAC files results in the visualization
working, but no audio output. Amarok must be restarted in order for
audio output to work again.

Steps to reproduce:

1. Queue three tracks, one non-FLAC, then one FLAC, then one non-FLAC.
2. Begin playback
3. Advance to near the end of the first track (or wait)
4. Observe effects 1, 2 as described above
5. Attempt to start playback of the third track by double-clicking
6. Observe effect 4 as desctibed above

This bug effectively makes FLAC files in the library "land mines" which
must be avoided to prevent the application from entering an effectively
useless state (which is similar in mangitude to a crash, and a great
deal more confusing.)

Using amarok 2:1.4.1-0ubuntu1.

** Affects: amarok (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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Amarok can't play audio after attempting to play a FLAC file
https://launchpad.net/bugs/56475