Transcribir voz a texto con bibliotecas de cliente

En esta página se explica cómo enviar una solicitud de reconocimiento de voz a Speech-to-Text en tu lenguaje de programación favorito mediante lasGoogle Cloud bibliotecas de cliente.

Speech-to-Text permite integrar de forma sencilla las tecnologías de reconocimiento de voz de Google en las aplicaciones de desarrolladores. Puedes enviar datos de audio a la API Speech-to-Text, que devuelve una transcripción de texto de ese archivo de audio. Para obtener más información sobre el servicio, consulta el artículo Conceptos básicos de Speech-to-Text.

Antes de empezar

  1. Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

  2. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

    Go to project selector

  3. Verify that billing is enabled for your Google Cloud project.

  4. Enable the Speech-to-Text APIs.

    Enable the APIs

  5. Make sure that you have the following role or roles on the project: Cloud Speech Administrator

    Check for the roles

    1. In the Google Cloud console, go to the IAM page.

      Go to IAM
    2. Select the project.

    3. In the Principal column, find all rows that identify you or a group that you're included in. To learn which groups you're included in, contact your administrator.

    4. For all rows that specify or include you, check the Role column to see whether the list of roles includes the required roles.

    Grant the roles

    1. In the Google Cloud console, go to the IAM page.

      Ir a IAM
    2. Selecciona el proyecto.
    3. Haz clic en Conceder acceso.

    4. En el campo Nuevos principales, introduce tu identificador de usuario. Normalmente, se trata de la dirección de correo de una cuenta de Google.

    5. En la lista Selecciona un rol, elige un rol.
    6. Para conceder más roles, haz clic en Añadir otro rol y añade cada rol adicional.
    7. Haz clic en Guardar.

  6. Install the Google Cloud CLI.

  7. Si utilizas un proveedor de identidades (IdP) externo, primero debes iniciar sesión en la CLI de gcloud con tu identidad federada.

  8. Para inicializar gcloud CLI, ejecuta el siguiente comando: 

    gcloud init

  9. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

    Go to project selector

  10. Verify that billing is enabled for your Google Cloud project.

  11. Enable the Speech-to-Text APIs.

    Enable the APIs

  12. Make sure that you have the following role or roles on the project: Cloud Speech Administrator

    Check for the roles

    1. In the Google Cloud console, go to the IAM page.

      Go to IAM
    2. Select the project.

    3. In the Principal column, find all rows that identify you or a group that you're included in. To learn which groups you're included in, contact your administrator.

    4. For all rows that specify or include you, check the Role column to see whether the list of roles includes the required roles.

    Grant the roles

    1. In the Google Cloud console, go to the IAM page.

      Ir a IAM
    2. Selecciona el proyecto.
    3. Haz clic en Conceder acceso.

    4. En el campo Nuevos principales, introduce tu identificador de usuario. Normalmente, se trata de la dirección de correo de una cuenta de Google.

    5. En la lista Selecciona un rol, elige un rol.
    6. Para conceder más roles, haz clic en Añadir otro rol y añade cada rol adicional.
    7. Haz clic en Guardar.

  13. Install the Google Cloud CLI.

  14. Si utilizas un proveedor de identidades (IdP) externo, primero debes iniciar sesión en la CLI de gcloud con tu identidad federada.

  15. Para inicializar gcloud CLI, ejecuta el siguiente comando: 

    gcloud init

    16. Las bibliotecas de cliente pueden usar las credenciales predeterminadas de la aplicación para autenticarse fácilmente en las APIs de Google y enviar solicitudes a esas APIs. Con las credenciales predeterminadas de la aplicación, puedes probar tu aplicación de forma local e implementarla sin cambiar el código subyacente. Para obtener más información, consulta el artículo Autenticarse para usar bibliotecas de cliente.

  16. If you're using a local shell, then create local authentication credentials for your user account: 

    gcloud auth application-default login

    You don't need to do this if you're using Cloud Shell.

    If an authentication error is returned, and you are using an external identity provider (IdP), confirm that you have signed in to the gcloud CLI with your federated identity.

    17. También debes instalar la biblioteca de cliente.

    Hacer una solicitud de transcripción de audio

    Usa el siguiente código para enviar una solicitud Recognize a la API Speech-to-Text.

    Java

    // Imports the Google Cloud client library
import com.google.api.gax.longrunning.OperationFuture;
import com.google.cloud.speech.v2.AutoDetectDecodingConfig;
import com.google.cloud.speech.v2.CreateRecognizerRequest;
import com.google.cloud.speech.v2.OperationMetadata;
import com.google.cloud.speech.v2.RecognitionConfig;
import com.google.cloud.speech.v2.RecognizeRequest;
import com.google.cloud.speech.v2.RecognizeResponse;
import com.google.cloud.speech.v2.Recognizer;
import com.google.cloud.speech.v2.SpeechClient;
import com.google.cloud.speech.v2.SpeechRecognitionAlternative;
import com.google.cloud.speech.v2.SpeechRecognitionResult;
import com.google.protobuf.ByteString;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.concurrent.ExecutionException;

public class QuickstartSampleV2 {

  public static void main(String[] args) throws IOException, ExecutionException,
      InterruptedException {
    String projectId = "my-project-id";
    String filePath = "path/to/audioFile.raw";
    String recognizerId = "my-recognizer-id";
    quickstartSampleV2(projectId, filePath, recognizerId);
  }

  public static void quickstartSampleV2(String projectId, String filePath, String recognizerId)
      throws IOException, ExecutionException, InterruptedException {

    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the "close" method on the client to safely clean up any remaining background resources.
    try (SpeechClient speechClient = SpeechClient.create()) {
      Path path = Paths.get(filePath);
      byte[] data = Files.readAllBytes(path);
      ByteString audioBytes = ByteString.copyFrom(data);

      String parent = String.format("projects/%s/locations/global", projectId);

      // First, create a recognizer
      Recognizer recognizer = Recognizer.newBuilder()
          .setModel("latest_long")
          .addLanguageCodes("en-US")
          .build();

      CreateRecognizerRequest createRecognizerRequest = CreateRecognizerRequest.newBuilder()
          .setParent(parent)
          .setRecognizerId(recognizerId)
          .setRecognizer(recognizer)
          .build();

      OperationFuture<Recognizer, OperationMetadata> operationFuture =
          speechClient.createRecognizerAsync(createRecognizerRequest);
      recognizer = operationFuture.get();

      // Next, create the transcription request
      RecognitionConfig recognitionConfig = RecognitionConfig.newBuilder()
          .setAutoDecodingConfig(AutoDetectDecodingConfig.newBuilder().build())
          .build();

      RecognizeRequest request = RecognizeRequest.newBuilder()
          .setConfig(recognitionConfig)
          .setRecognizer(recognizer.getName())
          .setContent(audioBytes)
          .build();

      RecognizeResponse response = speechClient.recognize(request);
      List<SpeechRecognitionResult> results = response.getResultsList();

      for (SpeechRecognitionResult result : results) {
        // There can be several alternative transcripts for a given chunk of speech. Just use the
        // first (most likely) one here.
        if (result.getAlternativesCount() > 0) {
          SpeechRecognitionAlternative alternative = result.getAlternativesList().get(0);
          System.out.printf("Transcription: %s%n", alternative.getTranscript());
        }
      }
    }
  }
}

    Python

    import os

from google.cloud.speech_v2 import SpeechClient
from google.cloud.speech_v2.types import cloud_speech

PROJECT_ID = os.getenv("GOOGLE_CLOUD_PROJECT")


def quickstart_v2(audio_file: str) -> cloud_speech.RecognizeResponse:
    """Transcribe an audio file.
    Args:
        audio_file (str): Path to the local audio file to be transcribed.
    Returns:
        cloud_speech.RecognizeResponse: The response from the recognize request, containing
        the transcription results
    """
    # Reads a file as bytes
    with open(audio_file, "rb") as f:
        audio_content = f.read()

    # Instantiates a client
    client = SpeechClient()

    config = cloud_speech.RecognitionConfig(
        auto_decoding_config=cloud_speech.AutoDetectDecodingConfig(),
        language_codes=["en-US"],
        model="long",
    )

    request = cloud_speech.RecognizeRequest(
        recognizer=f"projects/{PROJECT_ID}/locations/global/recognizers/_",
        config=config,
        content=audio_content,
    )

    # Transcribes the audio into text
    response = client.recognize(request=request)

    for result in response.results:
        print(f"Transcript: {result.alternatives[0].transcript}")

    return response

    Has enviado tu primera solicitud a Speech-to-Text.

    Limpieza

    Para evitar que se apliquen cargos en tu cuenta de Google Cloud por los recursos utilizados en esta página, sigue estos pasos.

    1. Optional: Revoke the authentication credentials that you created, and delete the local credential file. 

      gcloud auth application-default revoke

    2. Optional: Revoke credentials from the gcloud CLI. 

      gcloud auth revoke

    Consola

  17. In the Google Cloud console, go to the Manage resources page.

    Go to Manage resources

  18. In the project list, select the project that you want to delete, and then click Delete.
  19. In the dialog, type the project ID, and then click Shut down to delete the project.

    20. gcloud

  20. In the Google Cloud console, go to the Manage resources page.

    Go to Manage resources

  21. In the project list, select the project that you want to delete, and then click Delete.
  22. In the dialog, type the project ID, and then click Shut down to delete the project.

    23. Siguientes pasos