[英]Google Speech API returns empty result for some, but not the others (C#)
EMPTY result looks like this: EMPTY结果如下所示:
json[0] "{\"result\":[]}"
json[1] ""
NON-EMPTY result (desired result) looks like this: NON-EMPTY结果(所需结果)如下所示:
json[0] "{\"result\":[]}"
json[1] "{\"result\":[{\"alternative\":[{\"transcript\":\"good morning Google how are you feeling today\",\"confidence\":0.987629}],\"final\":true}],\"result_index\":0}"
json[2] ""
I have this function, that is supposed to take the ".flac" file and turn it into text. 我有此功能,应该使用“ .flac”文件并将其转换为文本。 For some reason, only these two sample ".flac" files return a string when passed through Google Speech API, other flac files return EMPTY result. 由于某些原因,只有这两个示例“ .flac”文件在通过Google Speech API传递时返回一个字符串,其他flac文件则返回EMPTY结果。 Same problem these guys are having: link 这些家伙遇到的同样问题: 链接
Here are all my flac files: link 这是我所有的flac文件: 链接
my.flac
and this_is_a_test.flac
work perfectly, google speech API gives me a jason object with the text in it. my.flac
和this_is_a_test.flac
可以完美地工作,谷歌语音API为我提供了一个带有文本的jason对象。
however, recorded.flac
does NOT work with google speech API and gives me EMPTY json object. 但是, recorded.flac
无法与Google Speech API一起使用,并给了我EMPTY json对象。
DEBUGGING: 调试:
recorded.flac
many times, loud and clear, and converted it to flac using ffmpeg. 我以为是问题所在的麦克风,所以我录制recorded.flac
record.flac多次,声音清晰,然后使用ffmpeg将其转换为flac。 But google speech API still can't recognize recorded.flac
但是谷歌语音API仍然无法识别recorded.flac
I thought i got the formatting wrong in the code, so i tried 我以为代码格式错误,所以我尝试了
_HWR_SpeechToText.ContentType = "audio/116; rate=16000"; _HWR_SpeechToText.ContentType =“ audio / 116; rate = 16000”;
instead of 代替
_HWR_SpeechToText.ContentType ="audio/x-flac; rate=44100"; _HWR_SpeechToText.ContentType =“ audio / x-flac; rate = 44100”;
Then, none of them worked, not a single flac file. so i changed it back.
Here is my google speech API code that turns FLAC files into TEXT (i don't think it is necessary, but, whatever): 这是我的Google Speech API代码,可将FLAC文件转换为TEXT(我认为这不是必需的,但是无论如何):
public void convert_to_text()
{
FileStream fileStream = File.OpenRead("recorded.flac");//my.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=" + ACCESS_GOOGLE_SPEECH_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();
StreamReader SR_Response = new StreamReader(HWR_Response.GetResponseStream());
string responseFromServer = (SR_Response.ReadToEnd());
String[] jsons = responseFromServer.Split('\n');
foreach (String j in jsons)
{
dynamic jsonObject = JsonConvert.DeserializeObject(j);
if (jsonObject == null || jsonObject.result.Count <= 0)
{
continue;
}
text = jsonObject.result[0].alternative[0].transcript;
jsons = null;
}
label1.Content = text;
}
First check that the file is 16-bit PCM Mono and not stereo. 首先检查文件是否为16位PCM单声道而不是立体声。 Easy to do with http://www.audacityteam.org/ 易于使用http://www.audacityteam.org/
Then you can use this simple code to do this: 然后,您可以使用以下简单代码执行此操作:
string api_key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
string path = @"C:\temp\good-morning-google.flac";
byte[] bytes = System.IO.File.ReadAllBytes(path);
WebClient client = new WebClient();
client.Headers.Add("Content-Type", "audio/x-flac; rate=44100");
byte[] result = client.UploadData(string.Format(
"https://www.google.com/speech-api/v2/recognize?client=chromium&lang=en-us&key={0}", api_key), "POST", bytes);
string s = client.Encoding.GetString(result);
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