第一步

Question

尝试使用google-cloud-speech做一些Speech Recognition。

我已经写了下面的代码，但是有一个问题，我不知道如何指定凭据，所以我得到了下面的错误，不知道怎么做，现在搜索网络2小时了：

java.io.IOException: The Application Default Credentials are not available. They
 are available if running in Google Compute Engine. Otherwise, the environment v
ariable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defini
ng the credentials. See https://developers.google.com/accounts/docs/application-
default-credentials for more information.

将音频从麦克风发送到Google服务器并返回文本

package googleSpeech;

import java.io.IOException;
import java.util.Arrays;
import java.util.HashMap;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.TargetDataLine;

import com.google.api.gax.rpc.ClientStream;
import com.google.api.gax.rpc.ResponseObserver;
import com.google.api.gax.rpc.StreamController;
import com.google.cloud.speech.v1.RecognitionConfig;
import com.google.cloud.speech.v1.SpeechClient;
import com.google.cloud.speech.v1.StreamingRecognitionConfig;
import com.google.cloud.speech.v1.StreamingRecognizeRequest;
import com.google.cloud.speech.v1.StreamingRecognizeResponse;
import com.google.protobuf.ByteString;

public class GoogleSpeechTest {

    public GoogleSpeechTest() {

        //Set credentials?

        //Target data line
        TargetDataLine microphone;
        AudioInputStream audio = null;

        //Check if Microphone is Supported
        checkMicrophoneAvailability();


        //Capture Microphone Audio Data
        try {

            // Signed PCM AudioFormat with 16kHz, 16 bit sample size, mono
            AudioFormat format = new AudioFormat(16000, 16, 1, true, false);
            DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);

            //Check if Microphone is Supported
            if (!AudioSystem.isLineSupported(info)) {
                System.out.println("Microphone is not available");
                System.exit(0);
            }

            //Get the target data line
            microphone = (TargetDataLine) AudioSystem.getLine(info);
            microphone.open(format);
            microphone.start();

            //Audio Input Stream
            audio = new AudioInputStream(microphone);

        } catch (Exception ex) {
            ex.printStackTrace();
        }

        //Send audio from Microphone to Google Servers and return Text
        try (SpeechClient client = SpeechClient.create()) {

            ResponseObserver<StreamingRecognizeResponse> responseObserver = new ResponseObserver<StreamingRecognizeResponse>() {

                public void onStart(StreamController controller) {
                    // do nothing
                }

                public void onResponse(StreamingRecognizeResponse response) {
                    System.out.println(response);
                }

                public void onComplete() {
                }

                public void onError(Throwable t) {
                    System.out.println(t);
                }
            };

            ClientStream<StreamingRecognizeRequest> clientStream = client.streamingRecognizeCallable().splitCall(responseObserver);

            RecognitionConfig recConfig = RecognitionConfig.newBuilder().setEncoding(RecognitionConfig.AudioEncoding.LINEAR16).setLanguageCode("en-US").setSampleRateHertz(16000)
                    .build();
            StreamingRecognitionConfig config = StreamingRecognitionConfig.newBuilder().setConfig(recConfig).build();

            StreamingRecognizeRequest request = StreamingRecognizeRequest.newBuilder().setStreamingConfig(config).build(); // The first request in a streaming call has to be a config

            clientStream.send(request);

            while (true) {
                byte[] data = new byte[10];
                try {
                    audio.read(data);
                } catch (IOException e) {
                    System.out.println(e);
                }
                request = StreamingRecognizeRequest.newBuilder().setAudioContent(ByteString.copyFrom(data)).build();
                clientStream.send(request);
            }
        } catch (Exception e) {
            System.out.println(e);
        }

    }

    /**
     * Checks if the Microphone is available
     */
    public static void checkMicrophoneAvailability() {
        enumerateMicrophones().forEach((string , info) -> {
            System.out.println("Name :" + string);
        });
    }

    /**
     * Generates a hashmap to simplify the microphone selection process. The keyset is the name of the audio device's Mixer The value is the first
     * lineInfo from that Mixer.
     * 
     * @author Aaron Gokaslan (Skylion)
     * @return The generated hashmap
     */
    public static HashMap<String,Line.Info> enumerateMicrophones() {
        HashMap<String,Line.Info> out = new HashMap<String,Line.Info>();
        Mixer.Info[] mixerInfos = AudioSystem.getMixerInfo();
        for (Mixer.Info info : mixerInfos) {
            Mixer m = AudioSystem.getMixer(info);
            Line.Info[] lineInfos = m.getTargetLineInfo();
            if (lineInfos.length >= 1 && lineInfos[0].getLineClass().equals(TargetDataLine.class))//Only adds to hashmap if it is audio input device
                out.put(info.getName(), lineInfos[0]);//Please enjoy my pun
        }
        return out;
    }

    public static void main(String[] args) {
        new GoogleSpeechTest();
    }

}

按照给出的答案进行操作

我的凭据.json看起来像我出现错误：

{
    "installed": {
        "client_id": "",
        "project_id": "",
        "auth_uri": "https://accounts.google.com/o/oauth2/auth",
        "token_uri": "https://accounts.google.com/o/oauth2/token",
        "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
        "client_secret": "",
        "redirect_uris": [
            "urn:ietf:wg:oauth:2.0:oob",
            "http://localhost"
        ]
    }
}

错误：

java.io.IOException: Error reading credential file from environment variable GOO
GLE_APPLICATION_CREDENTIALS, value 'D:/GOXR3PLUS STUDIO/XR3IA/creds.json': Error
 reading credentials from stream, 'type' field not specified.

更新3

解决了此链接后的错误-> https://github.com/Triple-T/gradle-play-publisher/issues/141

Answer 1

我假设您是从Google Cloud Console下载凭据的。它们应该作为文件保存在计算机上的某个地方。

您需要设置GOOGLE_APPLICATION_CREDENTIALS环境变量，使其直接指向该文件。指定该文件的路径。例如，如果在当前工作目录上方的文件夹中将凭据称为creds.json，则可以将环境变量设置为../creds.json。您还可以指定绝对路径。

要实际设置环境变量，每个操作系统会有所不同。 Here's a good post可以帮助您。如果您使用的是Intellij，则可以set it directly in the run configuration。

Answer 2

您的凭据文件如下所示：

假设您使用Eclipse，请按照以下步骤操作

第一步

第二步

将文件加载到`Java`中的另一种方法，但使用后果自负

public class SetEnv {

    public static void setEnv(Map<String, String> newenv)
            throws ClassNotFoundException, IllegalAccessException, NoSuchFieldException {
        try {
            Class<?> processEnvironmentClass = Class.forName("java.lang.ProcessEnvironment");
            Field theEnvironmentField = processEnvironmentClass.getDeclaredField("theEnvironment");
            theEnvironmentField.setAccessible(true);
            Map<String, String> env = (Map<String, String>) theEnvironmentField.get(null);
            env.putAll(newenv);
            Field theCaseInsensitiveEnvironmentField = processEnvironmentClass
                    .getDeclaredField("theCaseInsensitiveEnvironment");
            theCaseInsensitiveEnvironmentField.setAccessible(true);
            Map<String, String> cienv = (Map<String, String>) theCaseInsensitiveEnvironmentField.get(null);
            cienv.putAll(newenv);
        } catch (NoSuchFieldException e) {
            Class[] classes = Collections.class.getDeclaredClasses();
            Map<String, String> env = System.getenv();
            for (Class cl : classes) {
                if ("java.util.Collections$UnmodifiableMap".equals(cl.getName())) {
                    Field field = cl.getDeclaredField("m");
                    field.setAccessible(true);
                    Object obj = field.get(env);
                    Map<String, String> map = (Map<String, String>) obj;
                    map.clear();
                    map.putAll(newenv);
                }
            }
        }
    }
}

并这样称呼它：

Map<String, String> google = new HashMap<>();
google.put("GOOGLE_APPLICATION_CREDENTIALS",
        new ClassPathResource("google_credentials.json").getURI().getPath());
SetEnv.setEnv(google);

最后一个错误。问题是因为您生成的文件无效。您需要创建一个新的有效密码。

从API管理器中，只需创建选择“创建凭据”> “服务帐户密钥”并为该服务生成一个新密钥，即关联到您的Google Play帐户。

为Java桌面应用程序google-cloud-speech定义GOOGLE_APPLICATION_CREDENTIALS

2 个答案:

第一步

第二步

将文件加载到`Java`中的另一种方法，但使用后果自负

为Java桌面应用程序google-cloud-speech定义GOOGLE_APPLICATION_CREDENTIALS

2 个答案:

第一步

第二步

将文件加载到Java中的另一种方法，但使用后果自负

将文件加载到`Java`中的另一种方法，但使用后果自负