将输入节点连接到 AVAudioSinkNode 时出错

Question

连接节点时出错

let sourceNode = AVAudioSinkNode { (test1, frameCount, audioBufferList) -> OSStatus in
    print("callback", self.testInteger)
    return noErr
}
audioEngine.attach(sourceNode)
audioEngine.connect(audioEngine.inputNode, to: sourceNode, format: nil)

[aurioc] AURemoteIO.cpp：1086：初始化：失败：-10851（启用 1，outf <2 ch，0 Hz，Float32，非内部> inf <2 ch，0 Hz，Float32，非间>)

然后 try audioEngine.start ()

时出错

[avae] AVAEInternal.h: 88 所需条件为假: [AVAudioEngineGraph.mm:1415:Initialize: (IsFormatSampleRateAndChannelCountValid (inputHWFormat))] [avae] AVAudioEngine.mm:160 Engine @ 0x2836a8940: 无法初始化，错误 = -10875 [avae] AVAEInternal.h: 88 所需条件为 false: [AVAudioEngineGraph.mm:1415:Initialize: (IsFormatSampleRateAndChannelCountValid (inputHWFormat))]

我也试过了

audioEngine.connect (audioEngine.inputNode, to: sourceNode, format: audioEngine.inputNode.inputFormat (forBus: 0))

和

audioEngine.connect (audioEngine.inputNode, to: sourceNode, format: audioEngine.inputNode.outputFormat (forBus: 0))

在这两种情况下，应用程序会因错误而崩溃 “由于未捕获的异常 'com.apple.coreaudio.avfaudio'，正在终止应用程序，原因：'所需条件为假：IsFormatSampleRateAndChannelCountValid（格式）”

Answer 1

我发现有必要将音频会话的类别放在 playAndRecord 中的问题

try audioSession.setCategory (.playAndRecord, mode: .spokenAudio, options: .defaultToSpeaker)

在这种情况下，此选项有效

audioEngine.connect (audioEngine.inputNode, to: sourceNode, format: audioEngine.inputNode.inputFormat (forBus: 0))

将输入节点连接到 AVAudioSinkNode 时出错

error while connecting input node to AVAudioSinkNode

core-audio

avfoundation

swift

avaudioengine