On Mar 13, 2011, at 11:05 AM, Matt Neuburg wrote:

> On Tue, 08 Mar 2011 17:01:33 -0800, Steve Christensen <puns...@mac.com> said:
>> The setup has a MPMoviePlayerController instance that is playing a local 
>> audio file. There is also a UIWebView whose HTML contains an <audio> tag. 
>> When the play control is tapped, I see a 
>> MPMoviePlayerPlaybackDidFinishNotification notification with a reason of 
>> MPMovieFinishReasonPlaybackEnded, then gdb shows the assertion failure and 
>> exception and dumps the backtrace (below).
> 
> What was the outcome on this? Thx - m.

Well, I'm still not sure of the exact "why" for the assertion, but I figured 
out what I was doing that it didn't like.

My MPMoviePlayerPlaybackDidFinishNotification handler is designed to queue up 
another audio file to play after the current one finishes. I NSLog'd the player 
initialization and all the notification handlers so I could watch the process 
more in realtime, and found that the next audio file was loaded and then very 
soon after got a MPMoviePlayerPlaybackDidFinishNotification. A bit after that 
is when the assertion failure and exception come along.

After playing with it for a bit, I found that the player's loadState property 
is set to (MPMovieLoadStatePlayable | MPMovieLoadStatePlaythroughOK) when 
playback finishes normally or MPMovieLoadStateUnknown when it's stopped because 
another player instance has grabbed control. I've added a test that prevents 
the queueing if the loadState is MPMovieLoadStateUnknown and that seems to work 
just fine.

I may have missed something in the docs that talks about this situation, but 
it's also probably true that I'm not using the player class in the most 
"standard" manner.

steve

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