1
我正在使用ExtAudioFileCreateWithURL
,並且在創建立體聲LPCM Float32 Wave文件時始終得到運行時kAudioFileUnsupportedDataFormatError
錯誤。我堅持使用單聲道(單聲道)文件也可以正常工作。任何提示?iOS kAudioFileUnsupportedDataFormatError創建用於錄製的音頻文件
下面的代碼片段:
let audioType: AudioFileTypeID = kAudioFileWAVEType
var recordingFormatStream = CAStreamBasicDescription(sampleRate: sampleRate, numChannels: 2, pcmf: .Float32, isInterleaved: false)!
err = ExtAudioFileCreateWithURL(audioFileRecordingURL,
audioType,
&recordingFormatStream,
nil,
AudioFileFlags.EraseFile.rawValue,
&audioRecordingAudioFile)
指出,audioFileRecordingURL
和audioRecordingAudioFile
正確鍵入並設置。
對於記載,recordingFormatStream
包含:
mFormatFlags = kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked | kAudioFormatFlagIsFloat | kAudioFormatFlagIsNonInterleaved
mFormatID = kAudioFormatLinearPCM
mSampleRate: 44100.0
mBytesPerPacket: 4, mFramesPerPacket: 1, mBytesPerFrame: 4, mChannelsPerFrame: 2, mBitsPerChannel: 32, mReserved: 0
我堅持認爲,如果我改變numChannels
1,一切都很好!使用iOS 9.3 SDK。