iOS音频文件无法在桌面网络浏览器中播放

Question

Why Safari/Chrome can not play the file created using AVAudioRecorder ?

Here's my recorder settings :

private static let settings = [
        AVFormatIDKey: NSNumber(unsignedInt: kAudioFormatMPEG4AAC),
        AVNumberOfChannelsKey: 2,
        AVSampleRateKey: 44100,
        AVEncoderBitRateKey: 128000,
        AVEncoderAudioQualityKey: NSNumber(long: AVAudioQuality.Max.rawValue)
    ]

And the reader :

<audio controls>
  <source src="MD_31E5106A-2901-49ED-8492-D29A654B826D" type="audio/mp4">
</audio>

I tried several settings, no success. All files are playable with VLC.

Here is a sample file: http://cl.ly/1l0z231x322l

Edit: reader code

Answer 1

UPDATE

Your file is a CAF/Core Audio Format , and AAC/caf is even less widely supported than AAC/m4a (not even iTunes plays caf files).

You could try converting it to .m4a and using the content-type audio/mp4 or converting it .aac and using audio/aac .

Or .mp3 audio/mpeg .

PREVIOUSLY

AAC/m4a is not a very widely supported format. You're better off using MP3.

Answer 2

It works if we had the an extension to the URL

recordURL = recordURL.URLByAppendingPathExtension("m4a") 
recorder = try AVAudioRecorder(URL: recordURL, settings: AudioRecorder.settings)