音频引擎仅在运行 iOS 10 的设备(iphone 6)上失败,在所有模拟器设备上运行良好或真实设备直到 iphone 6s
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【中文标题】音频引擎仅在运行 iOS 10 的设备(iphone 6)上失败,在所有模拟器设备上运行良好或真实设备直到 iphone 6s【英文标题】:Audio engine fails only on device(iphone6s) running iOS10 , runs on All simulator devices well or real device til iphone 6s 【发布时间】:2016-09-21 10:37:21 【问题描述】:我确实尝试将效果添加到音频文件,它确实适用于 ios 9,但在 iOS10 中它仅在 iphone 6s 中失败,在旧设备上运行,在模拟器中运行良好,我的信息中确实有隐私使用说明。用于照片、相机和 microfon 的 plist 文件 我确实在 audioEngine.mainMixerNode.installTapOnBus 线上得到了输卵管错误
2016-09-21 13:08:20.109701 $$$$[557:86076] [central] 54: ERROR: [0x16e34f000] >avae> AVAudioNode.mm:751: AUSetFormat: error -10865
2016-09-21 13:08:20.110111 Tell Your Story[557:86076] *** Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'error -10865'
我用于添加音频效果的函数
private fund addEffetToAudioFile(pitch: Float, rate: Float, reverb: Float, echo: Float) // Initialize variables
audioEngine = AVAudioEngine()
audioPlayerNode = AVAudioPlayerNode()
audioEngine.attachNode(audioPlayerNode)
// Setting the pitch
let pitchEffect = AVAudioUnitTimePitch()
pitchEffect.pitch = pitch
audioEngine.attachNode(pitchEffect)
// Setting the platback-rate
let playbackRateEffect = AVAudioUnitVarispeed()
playbackRateEffect.rate = rate
audioEngine.attachNode(playbackRateEffect)
// Setting the reverb effect
let reverbEffect = AVAudioUnitReverb()
reverbEffect.loadFactoryPreset(AVAudioUnitReverbPreset.Cathedral)
reverbEffect.wetDryMix = reverb
audioEngine.attachNode(reverbEffect)
// Setting the echo effect on a specific interval
let echoEffect = AVAudioUnitDelay()
echoEffect.delayTime = NSTimeInterval(echo)
audioEngine.attachNode(echoEffect)
// Chain all these up, ending with the output
audioEngine.connect(audioPlayerNode, to: playbackRateEffect, format: nil)
audioEngine.connect(playbackRateEffect, to: pitchEffect, format: nil)
audioEngine.connect(pitchEffect, to: reverbEffect, format: nil)
audioEngine.connect(reverbEffect, to: echoEffect, format: nil)
audioEngine.connect(echoEffect, to: audioEngine.mainMixerNode, format: nil)
// Good practice to stop before starting
audioPlayerNode.stop()
// Play the audio file
if (audioEngine != nil)
audioEngine?.stop()
do
audioFile = try AVAudioFile(forReading: self.recordedAudioURL)
catch
print("Error: Can't create audio file")
self.showAlert(TYSAudioEditorHelper.Alerts.AudioFileError, message: String(error))
return
audioPlayerNode.scheduleFile(audioFile, atTime: nil, completionHandler:
print("Complete")
)
try! audioEngine.start()
let dirPaths: AnyObject = NSSearchPathForDirectoriesInDomains( NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0]
let tmpFileUrl: NSURL = NSURL.fileURLWithPath(dirPaths.stringByAppendingPathComponent(kOutputSoundWithEffectFileName))
do
self.newAudio = try AVAudioFile(forWriting: tmpFileUrl, settings:[
AVFormatIDKey: NSNumber(unsignedInt:kAudioFormatMPEG4AAC_HE),
AVEncoderAudioQualityKey : AVAudioQuality.Medium.rawValue,
AVEncoderBitRateKey : 12800,
AVNumberOfChannelsKey: 2,
AVSampleRateKey : 44100.0
])
/*Error in this line*/ audioEngine.mainMixerNode.installTapOnBus(0, bufferSize: 2048, format: audioEngine.mainMixerNode.inputFormatForBus(1)) (buffer: AVAudioPCMBuffer!, time: AVAudioTime!) -> Void in
print(self.newAudio.length)
if (self.newAudio.length) < (self.audioFile.length)
//Let us know when to stop saving the file, otherwise saving infinitely
do
try self.newAudio.writeFromBuffer(buffer)
catch
print("Problem Writing Buffer")
else
self.audioEngine.mainMixerNode.removeTapOnBus(0)
//if we dont remove it, will keep on tapping infinitely
self.newAudio = nil
if (self.audioEngine != nil)
self.audioEngine?.stop()
self.removeOldFileIfExist(self.kOriginalVideoSoundFileName)
self.saveAudioFileInVideo(tmpFileUrl)
catch
print("Problem")
do
try audioEngine.start()
catch
showAlert(TYSAudioEditorHelper.Alerts.AudioEngineError, message: String(error))
return
// play the recording!
audioPlayerNode.play()
【问题讨论】:
【参考方案1】:根据https://developer.apple.com/reference/audiotoolbox/1584138-anonymous/kaudiouniterr_propertynotwritable?language=objc那个错误是
kAudioUnitErr_PropertyNotWritable = -10865
根据https://developer.apple.com/reference/avfoundation/avaudionode/1387122-installtap
格式: 如果非零,则尝试将其应用为指定输出总线的格式。 仅当连接到未连接到另一个节点的输出总线时才应该这样做;否则将导致错误。指定总线上的抽头和连接格式(如果非零)应该相同。否则,后一个操作将覆盖任何先前设置的格式。 对于 AVAudioOutputNode,tap 格式必须指定为 nil。
所以可能是以下之一:
mainMixerNode已经连接到另一个节点,所以在安装tap之前需要断开它们
mainMixerNode是一个AVAudioOutputNode,所以这个参数需要传入nil
【讨论】:
发现问题只需要评论这一行 -> //try! audioEngine.start() @ivan123 直接评论 audioengine.start 函数会给你错误,因为它是应该启动 audioengine 的情况。你解决了这个问题吗?以上是关于音频引擎仅在运行 iOS 10 的设备(iphone 6)上失败,在所有模拟器设备上运行良好或真实设备直到 iphone 6s的主要内容,如果未能解决你的问题,请参考以下文章
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