将Amazon Polly文本转换为语音转换时接收零字节音频流

Question

我正在尝试使用Amazon Web Services Polly和适用于C＃的AWS开发工具包进行文本到语音转换。我已经尝试了很基本的转换：

AmazonPollyClient client = new AmazonPollyClient("secret", "secret", Amazon.RegionEndpoint.USEast1); 
Amazon.Polly.Model.SynthesizeSpeechRequest request = new SynthesizeSpeechRequest(); 
request.OutputFormat = OutputFormat.Mp3; 
request.Text = "This is my first conversion"; 
request.TextType = TextType.Text; 
request.VoiceId = VoiceId.Nicole; 
Amazon.Polly.Model.SynthesizeSpeechResponse response = client.SynthesizeSpeech(request); 

我收到HTTP 200 OK响应（没有抛出异常），但是音频流为空：

缺少了什么？

Answer 1

返回AudioStream没有长度，直到你的地方阅读，如到一个文件：

using System; 
using System.IO; 
using Amazon; 
using Amazon.Polly; 
using Amazon.Polly.Model; 
namespace AwsPollySO1 
{ 
    class Program 
    { 
     public static void Main(string[] args) 
     { 
      AmazonPollyClient client = new AmazonPollyClient("yourID", "yourSecretKey", RegionEndpoint.USEast1); 
      SynthesizeSpeechRequest request = new SynthesizeSpeechRequest(); 
      request.OutputFormat = OutputFormat.Mp3; 
      request.Text = "This is my first conversion"; 
      request.TextType = TextType.Text; 
      request.VoiceId = VoiceId.Nicole; 
      SynthesizeSpeechResponse response = client.SynthesizeSpeech(request); 
      Console.WriteLine("ContentType: " + response.ContentType); 
      Console.WriteLine("RequestCharacters: " + response.RequestCharacters); 
      FileStream destination = File.Open(@"c:\temp\myfirstconversion.mp3", FileMode.Create); 
      response.AudioStream.CopyTo(destination); 
      Console.WriteLine("Destination length: {0}", destination.Length.ToString()); 
      destination.Close(); 
      Console.Read(); 
     } 
    } 
} 

Answer 2

我相信所有你需要做的就是冲洗，然后再储存（甚至看到长度）的流

response.AudioStream.CopyTo(destination); 
destination.Flush(); 

看看这是否适合你。