Re: Assertion failure in -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:]
On Sun, 13 Mar 2011 15:14:53 -0700, Steve Christensen puns...@mac.com said: 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. Thanks, Steve - mostly I just wanted to make sure that this wasn't something I was likely to encounter, and you've made clear that it isn't, since the cause of the issue was really the automatic queuing behavior. This explains perfectly how you could be getting a didBecomeActive notification right after playback finishes: *you* were making the MPMoviePlayerController active once again. I guess I'm not surprised that the MPMoviePlayerController would not like your loading up an audio file while the UIWebView is already playing an audio file, since there is this rule that There Can Be Only One - for example, trying to put two MPMoviePlayerController views into your app and playing them both simultaneously won't work either. This is part of the price we pay for the simplicity of these ways of playing sound. Glad you got it straightened out - m. -- matt neuburg, phd = m...@tidbits.com, http://www.apeth.net/matt/ A fool + a tool + an autorelease pool = cool! Programming iOS 4! http://www.apeth.net/matt/default.html#iosbook___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Assertion failure in -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:]
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. -- matt neuburg, phd = m...@tidbits.com, http://www.apeth.net/matt/ A fool + a tool + an autorelease pool = cool! Programming iOS 4! http://www.apeth.net/matt/default.html#iosbook___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Assertion failure in -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:]
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 ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Assertion failure in -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:]
I saw that assertion yesterday in a bit of code that was accidentally calling a MPMoviePlayerController method from a secondary thread. Dave On Mar 8, 2011, at 5:01 PM, Steve Christensen wrote: I'm seeing the above assertion in an app running on iOS 4.2.1. It then throws an NSInternalInconsistencyException with the reason: movie player MPMoviePlayerControllerNew: 0x446fbe0 has wrong activation state (1). 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). If I start playing the HTML's audio then start the MPMoviePlayerController's audio, the HTML's audio fades out and the MPMoviePlayerController's plays, so there's probably some subtle difference I'm missing. Any ideas what I might be doing wrong or what to look at? Everything is working great except when it comes time for dueling audio. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Assertion failure in -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:]
I'm seeing the above assertion in an app running on iOS 4.2.1. It then throws an NSInternalInconsistencyException with the reason: movie player MPMoviePlayerControllerNew: 0x446fbe0 has wrong activation state (1). 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). If I start playing the HTML's audio then start the MPMoviePlayerController's audio, the HTML's audio fades out and the MPMoviePlayerController's plays, so there's probably some subtle difference I'm missing. Any ideas what I might be doing wrong or what to look at? Everything is working great except when it comes time for dueling audio. steve - 0 CoreFoundation 0x314d0987 __exceptionPreprocess + 114 1 libobjc.A.dylib 0x319a149d objc_exception_throw + 24 2 CoreFoundation 0x314d07c9 +[NSException raise:format:arguments:] + 68 3 Foundation 0x31d1629f -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 62 4 MediaPlayer 0x360b1571 -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:] + 124 5 Foundation 0x31cd8623 _nsnote_callback + 142 6 CoreFoundation 0x31457123 __CFXNotificationPost_old + 402 7 CoreFoundation 0x31456dc3 _CFXNotificationPostNotification + 118 8 Foundation 0x31cc7d23 -[NSNotificationCenter postNotificationName:object:userInfo:] + 70 9 MediaPlayer 0x360b0e09 -[MPMoviePlayerControllerNew _postNotificationName:object:userInfo:] + 72 10 MediaPlayer 0x360b0e41 -[MPMoviePlayerControllerNew _postNotificationName:object:] + 24 11 MediaPlayer 0x360b0fc1 -[MPMoviePlayerControllerNew _resignActive] + 52 12 MediaPlayer 0x360b2fb7 -[MPMoviePlayerController _resignActive] + 66 13 CoreFoundation 0x31473fc7 -[NSObject(NSObject) performSelector:] + 18 14 CoreFoundation 0x3147cd51 -[NSArray makeObjectsPerformSelector:] + 388 15 MediaPlayer 0x360b44a1 +[MPMoviePlayerController allInstancesResignActive] + 32 16 MediaPlayer 0x360bc143 -[UIMoviePlayerController _ensureActive] + 62 17 MediaPlayer 0x360b8d17 -[UIMoviePlayerController videoController:tappedButtonPart:] + 18 18 MediaPlayer 0x36115cfb -[MPInlineVideoViewController transportControls:tappedButtonPart:] + 78 19 MediaPlayer 0x360e4f75 -[MPTransportControls _handleTapForPart:] + 112 20 MediaPlayer 0x360e54ad -[MPTransportControls buttonUp:] + 60 21 CoreFoundation 0x31477fed -[NSObject(NSObject) performSelector:withObject:withObject:] + 24 22 UIKit 0x338c14ad -[UIApplication sendAction:to:from:forEvent:] + 84 23 UIKit 0x338c144d -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 32 24 UIKit 0x338c141f -[UIControl sendAction:to:forEvent:] + 38 25 UIKit 0x338c1171 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 356 26 UIKit 0x338c19cf -[UIControl touchesEnded:withEvent:] + 342 27 UIKit 0x338b7355 -[UIWindow _sendTouchesForEvent:] + 368 28 UIKit 0x338b6ccf -[UIWindow sendEvent:] + 262 ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
