如何在c#中使用google语音识别api?

我想从c#获取音频文件,并发送到谷歌语音识别API获得“语音到文本”的答案.

我的代码是这样的:

try
{                
    byte[] BA_AudioFile = GetFile(filename);              
    HttpWebRequest _HWR_SpeechToText = null;
    _HWR_SpeechToText =
                (HttpWebRequest)HttpWebRequest.Create(
                    "https://www.google.com/speech-api/v2/recognize?output=json&lang=" + DEFAULT_LANGUAGE + "&key=" + key);
    _HWR_SpeechToText.Credentials = CredentialCache.DefaultCredentials;
    _HWR_SpeechToText.Method = "POST";
    _HWR_SpeechToText.ContentType = "audio/x-flac; rate=44100";
    _HWR_SpeechToText.ContentLength = BA_AudioFile.Length;
    Stream stream = _HWR_SpeechToText.GetRequestStream();
    stream.Write(BA_AudioFile, 0, BA_AudioFile.Length);
    stream.Close();

    HttpWebResponse HWR_Response = (HttpWebResponse)_HWR_SpeechToText.GetResponse();
    if (HWR_Response.StatusCode == HttpStatusCode.OK)
    {
        StreamReader SR_Response = new StreamReader(HWR_Response.GetResponseStream());
        Console.WriteLine(SR_Response.ToString());
    }

}
catch (Exception ex)
{
    Console.WriteLine(ex.ToString());
}

这部分是为了上传file.wav并获取对于我从互联网找到的google API的响应.

但我的代码总是捕捉到例外:

在调用_HWR_SpeechToText.GetResponse()之前,必须将内容长度字节写入请求流.但是我已经写了ContextLength.

所以我的问题是为什么我的程序失败了?这是因为Google链接或HTTPWebRequest我不适当地使用?

这是我正确的地方我有API密钥吗?

刚刚测试了这个,下面是一个工作的解决方案,如果你有一个有效的API密钥.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;

namespace GoogleRequest
{
 class Program
 {
    static void Main(string[] args)
    {
        try
        {

            FileStream fileStream = File.OpenRead("good-morning-google.flac");
            MemoryStream memoryStream = new MemoryStream();
            memoryStream.SetLength(fileStream.Length);
            fileStream.Read(memoryStream.GetBuffer(), 0, (int)fileStream.Length);
            byte[] BA_AudioFile = memoryStream.GetBuffer();
            HttpWebRequest _HWR_SpeechToText = null;
            _HWR_SpeechToText =
                        (HttpWebRequest)HttpWebRequest.Create(
                            "https://www.google.com/speech-api/v2/recognize?output=json&lang=en-us&key=YOUR_API_KEY_HERE");
            _HWR_SpeechToText.Credentials = CredentialCache.DefaultCredentials;
            _HWR_SpeechToText.Method = "POST";
            _HWR_SpeechToText.ContentType = "audio/x-flac; rate=44100";
            _HWR_SpeechToText.ContentLength = BA_AudioFile.Length;
            Stream stream = _HWR_SpeechToText.GetRequestStream();
            stream.Write(BA_AudioFile, 0, BA_AudioFile.Length);
            stream.Close();

            HttpWebResponse HWR_Response = (HttpWebResponse)_HWR_SpeechToText.GetResponse();
            if (HWR_Response.StatusCode == HttpStatusCode.OK)
            {
                StreamReader SR_Response = new StreamReader(HWR_Response.GetResponseStream());
                Console.WriteLine(SR_Response.ReadToEnd());
            }

        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.ToString());
        }

        Console.ReadLine();
    }
}

}

翻译自:https://stackoverflow.com/questions/25148373/how-to-use-google-speech-recognition-api-in-c

转载注明原文:如何在c#中使用google语音识别api?