在AVAudioEngine中从网络流数据，是否可能？ [英] Stream data from network in AVAudioEngine, is it possible?

问题描述

我有一个应用程序，我使用 AVAudioEngine 通过 AVAudioPlayerNodes 从本地文件系统播放文件 AVAudioFiles 。这非常合适。

现在我想启用我的设置，也支持从互联网上的服务器流式传输MP3文件。

到目前为止我尝试了什么

我希望我可以从<$创建某种缓冲区c $ c> NSURL 指向网络地址的对象，然后我可以使用我的 AVAudioPlayerNode 。

我搜索了 Stack Overflow 和互联网一般但没有找到任何关于如何实现这一目标的好建议。<我知道 AVAudioEngine 阵容包括：

>

AVAudioPlayerNode ，可以播放来自 AVAudioFile 或 AVAudioBuffer 的音频。我今天已经使用 AVAudioFile 进行本地文件设置。

AVAudioFile ，这是用于本地文件。 'AVAudioFile'是使用'NSURL'创建的，所以我尝试使用指向服务器上的MP3文件的URL，就像在Playground中一样：

  var fileError：NSError？ = nil 
 let file = AVAudioFile（forReading：someURL，error：& fileError）
 if fileError！= nil {
 fileError 
} 
  

奖励我这个错误：

 错误Domain = com.apple.coreaudio.avfaudio Code = 2003334207操作无法完成。（com.apple.coreaudio.avfaudio error 2003334207.）UserInfo = 0x7fbfab424480 {failed call = ExtAudioFileOpenURL（（CFURLRef）fileURL，& _extAudioFile）} 
  

• AVAudioPCMBuffer ，这是我希望使用的类，但我找不到用数据实例化的方法。

我的问题（只是为了说清楚： - ））

你们中有谁聪明的人知道如何使用 AVAudioEngine 从互联网服务器上传输MP3文件？

或者我应该放弃并使用 AVPlayer 为此？

期待收到您的回复。

解决方案

Apple的文档没有说明它是否可以与在线托管的mp3一起使用，但是一旦我尝试初始化 AVAudioFile 使用mp3网址，它会立即崩溃并导致致命异常。我认为这可以回答你的问题。

I have an app in which I use AVAudioEngine for playing files from the local file system by using AVAudioPlayerNodes and AVAudioFiles. This works perfectly fine.

Now I would like to enable my setup to also support streaming of MP3 files from a server on the internet.

What I've tried so far

My hope was that I could create some sort of buffers from NSURL objects pointing to network addresses, which I could then use with my AVAudioPlayerNode.

I've searched Stack Overflow and the internet in general but haven't found any good tips on how to achieve this.

I know that the AVAudioEngine lineup consists of:

• AVAudioPlayerNode, which can play audio from an AVAudioFile or a AVAudioBuffer. I already use AVAudioFile for my "local file setup" today.

• AVAudioFile, which is to be used for local files. An 'AVAudioFile' is created with an 'NSURL' so I've tried with an URL that points to a MP3 file on a server like so in a Playground:

  var fileError: NSError? = nil
  let file = AVAudioFile(forReading: someURL, error: &fileError)
  if fileError != nil {
      fileError
  }
  

which rewards me with this error:

Error Domain=com.apple.coreaudio.avfaudio Code=2003334207 "The operation couldn’t be completed. (com.apple.coreaudio.avfaudio error 2003334207.)" UserInfo=0x7fbfab424480 {failed call=ExtAudioFileOpenURL((CFURLRef)fileURL, &_extAudioFile)}

• AVAudioPCMBuffer, which is the class I was hoping to use, but I can not find any way to instantiate it with data.

My question (just to make it clear :-))

Does any of you bright people out there know how to use AVAudioEngine for streaming MP3 files from a server on the internet?

Or should I just give up and use AVPlayer for this?

Looking forward to hearing from you.

解决方案

Apple's documentation doesn't specify if it can work with a mp3 hosted online but as soon as I try to initialize an AVAudioFile with a mp3 url it crashes instantly with a fatal exception. I think that answers your question.

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