iPhone iOS6音頻崩潰

Question

我們已經開始注意到一些用戶更新到iOS6後的一些奇怪的音頻錯誤。 我們正在使用MPMusicPlayerController和一些其他核心音頻功能。任何人都有類似的經歷嗎？控制檯日誌片段：

Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Notice>: >vad< ERROR: 23:14:43.712 [tid 0x2ff6f000] VirtualStream.cpp[465]: GetCurrentFormats(): Error 'what' getting virtual format for actual format [ 16/44100/1; flags: 0x44; bytes/packet: 4; frames/packet: 1; bytes/frame: 4; ] 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Notice>: >vad< EXCEPTION: 23:14:43.718 [tid 0x2ff6f000] VirtualStream.cpp[369]: GetPropertyData(): result: "error getting current stream format" 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Notice>: >vad< ERROR: 23:14:43.731 [tid 0x2ff6f000] VirtualStream.cpp[465]: GetCurrentFormats(): Error 'what' getting virtual format for actual format [ 16/44100/1; flags: 0x44; bytes/packet: 4; frames/packet: 1; bytes/frame: 4; ] 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Notice>: >vad< ERROR: 23:14:43.738 [tid 0x2ff6f000] VirtualAudio_Stream.cpp[411]: UpdatePhysicalFormat(): error 'what' getting underlying stream format 
Sep 30 23:14:43 JMS-iPhone Application[3009] <Warning>: [DB] phone volume changed to: 1.000000 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Notice>: >vad< ERROR: 23:14:43.858 [tid 0x3265000] VirtualStream.cpp[465]: GetCurrentFormats(): Error 'what' getting virtual format for actual format [ 16/44100/1; flags: 0x44; bytes/packet: 4; frames/packet: 1; bytes/frame: 4; ] 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Notice>: >vad< EXCEPTION: 23:14:43.863 [tid 0x3265000] AggregateDevice_Common.cpp[1204]: UpdateIOProcCache(): result: "Stream::GetCurrentFormat() returned an error." 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Notice>: >vad< EXCEPTION: 23:14:43.867 [tid 0x3265000] VirtualAudio_Device.cpp[2186]: StartIOEngine(): theError: "error starting IO on the active device" 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Error>: 23:14:43.870 <AudioControl> AQMEIO_Base::DoStartIO: error 2003329396 
Sep 30 23:14:43 JMS-iPhone mediaserverd[37] <Error>: 23:14:43.872 <AudioControl> AQMEDevice(0x1ea4e000)::StartIO: error 2003329396 

Answer 1

好吧，我想我們現在已經解決了這個問題。真正發生的是我們並沒有完全理解背景音頻和音頻會話中斷的複雜性。

如果您有奇怪的聲音問題，請檢查您是否正確處理中斷。

對不起，不提供有關處理中斷任何代碼，更多的信息：

http://developer.apple.com/library/ios/#documentation/Audio/Conceptual/AudioSessionProgrammingGuide/HandlingAudioInterruptions/HandlingAudioInterruptions.html