Hay más ejemplos de AWS SDK disponibles en el GitHub repositorio de ejemplos de AWS Doc SDK
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Ejemplos de Amazon Transcribe usando SDK para Java 2.x
Los siguientes ejemplos de código muestran cómo realizar acciones e implementar escenarios comunes AWS SDK for Java 2.x con Amazon Transcribe.
Las acciones son extractos de código de programas más grandes y deben ejecutarse en contexto. Mientras las acciones muestran cómo llamar a las distintas funciones de servicio, es posible ver las acciones en contexto en los escenarios relacionados.
Los escenarios son ejemplos de código que muestran cómo llevar a cabo una tarea específica a través de llamadas a varias funciones dentro del servicio o combinado con otros Servicios de AWS.
En cada ejemplo se incluye un enlace al código de origen completo, con instrucciones de configuración y ejecución del código en el contexto.
Temas
Acciones
En el siguiente ejemplo de código, se muestra cómo utilizar ListTranscriptionJobs.
- SDK para Java 2.x
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nota
Hay más información al respecto. GitHub Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS
. public class ListTranscriptionJobs { public static void main(String[] args) { TranscribeClient transcribeClient = TranscribeClient.builder() .region(Region.US_EAST_1) .build(); listTranscriptionJobs(transcribeClient); } public static void listTranscriptionJobs(TranscribeClient transcribeClient) { ListTranscriptionJobsRequest listJobsRequest = ListTranscriptionJobsRequest.builder() .build(); transcribeClient.listTranscriptionJobsPaginator(listJobsRequest).stream() .flatMap(response -> response.transcriptionJobSummaries().stream()) .forEach(jobSummary -> { System.out.println("Job Name: " + jobSummary.transcriptionJobName()); System.out.println("Job Status: " + jobSummary.transcriptionJobStatus()); System.out.println("Output Location: " + jobSummary.outputLocationType()); // Add more information as needed // Retrieve additional details for the job if necessary GetTranscriptionJobResponse jobDetails = transcribeClient.getTranscriptionJob( GetTranscriptionJobRequest.builder() .transcriptionJobName(jobSummary.transcriptionJobName()) .build()); // Display additional details System.out.println("Language Code: " + jobDetails.transcriptionJob().languageCode()); System.out.println("Media Format: " + jobDetails.transcriptionJob().mediaFormat()); // Add more details as needed System.out.println("--------------"); }); } }-
Para obtener más información sobre la API, consulta ListTranscriptionJobsla Referencia AWS SDK for Java 2.x de la API.
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Escenarios
En el siguiente ejemplo de código, se muestra cómo:
Iniciar un trabajo de transcripción con Amazon Transcribe.
Esperar a que el trabajo finalice.
Obtener el URI en el que está almacenada la transcripción.
Para obtener información, consulte Introducción a Amazon Transcribe.
- SDK para Java 2.x
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nota
Hay más información al respecto GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS
. Transcribe un archivo PCM.
/** * To run this AWS code example, ensure that you have set up your development * environment, including your AWS credentials. * * For information, see this documentation topic: * * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html */ public class TranscribeStreamingDemoFile { private static final Region REGION = Region.US_EAST_1; private static TranscribeStreamingAsyncClient client; public static void main(String args[]) throws ExecutionException, InterruptedException { final String USAGE = "\n" + "Usage:\n" + " <file> \n\n" + "Where:\n" + " file - the location of a PCM file to transcribe. In this example, ensure the PCM file is 16 hertz (Hz). \n"; if (args.length != 1) { System.out.println(USAGE); System.exit(1); } String file = args[0]; client = TranscribeStreamingAsyncClient.builder() .region(REGION) .build(); CompletableFuture<Void> result = client.startStreamTranscription(getRequest(16_000), new AudioStreamPublisher(getStreamFromFile(file)), getResponseHandler()); result.get(); client.close(); } private static InputStream getStreamFromFile(String file) { try { File inputFile = new File(file); InputStream audioStream = new FileInputStream(inputFile); return audioStream; } catch (FileNotFoundException e) { throw new RuntimeException(e); } } private static StartStreamTranscriptionRequest getRequest(Integer mediaSampleRateHertz) { return StartStreamTranscriptionRequest.builder() .languageCode(LanguageCode.EN_US) .mediaEncoding(MediaEncoding.PCM) .mediaSampleRateHertz(mediaSampleRateHertz) .build(); } private static StartStreamTranscriptionResponseHandler getResponseHandler() { return StartStreamTranscriptionResponseHandler.builder() .onResponse(r -> { System.out.println("Received Initial response"); }) .onError(e -> { System.out.println(e.getMessage()); StringWriter sw = new StringWriter(); e.printStackTrace(new PrintWriter(sw)); System.out.println("Error Occurred: " + sw.toString()); }) .onComplete(() -> { System.out.println("=== All records stream successfully ==="); }) .subscriber(event -> { List<Result> results = ((TranscriptEvent) event).transcript().results(); if (results.size() > 0) { if (!results.get(0).alternatives().get(0).transcript().isEmpty()) { System.out.println(results.get(0).alternatives().get(0).transcript()); } } }) .build(); } private static class AudioStreamPublisher implements Publisher<AudioStream> { private final InputStream inputStream; private static Subscription currentSubscription; private AudioStreamPublisher(InputStream inputStream) { this.inputStream = inputStream; } @Override public void subscribe(Subscriber<? super AudioStream> s) { if (this.currentSubscription == null) { this.currentSubscription = new SubscriptionImpl(s, inputStream); } else { this.currentSubscription.cancel(); this.currentSubscription = new SubscriptionImpl(s, inputStream); } s.onSubscribe(currentSubscription); } } public static class SubscriptionImpl implements Subscription { private static final int CHUNK_SIZE_IN_BYTES = 1024 * 1; private final Subscriber<? super AudioStream> subscriber; private final InputStream inputStream; private ExecutorService executor = Executors.newFixedThreadPool(1); private AtomicLong demand = new AtomicLong(0); SubscriptionImpl(Subscriber<? super AudioStream> s, InputStream inputStream) { this.subscriber = s; this.inputStream = inputStream; } @Override public void request(long n) { if (n <= 0) { subscriber.onError(new IllegalArgumentException("Demand must be positive")); } demand.getAndAdd(n); executor.submit(() -> { try { do { ByteBuffer audioBuffer = getNextEvent(); if (audioBuffer.remaining() > 0) { AudioEvent audioEvent = audioEventFromBuffer(audioBuffer); subscriber.onNext(audioEvent); } else { subscriber.onComplete(); break; } } while (demand.decrementAndGet() > 0); } catch (Exception e) { subscriber.onError(e); } }); } @Override public void cancel() { executor.shutdown(); } private ByteBuffer getNextEvent() { ByteBuffer audioBuffer = null; byte[] audioBytes = new byte[CHUNK_SIZE_IN_BYTES]; int len = 0; try { len = inputStream.read(audioBytes); if (len <= 0) { audioBuffer = ByteBuffer.allocate(0); } else { audioBuffer = ByteBuffer.wrap(audioBytes, 0, len); } } catch (IOException e) { throw new UncheckedIOException(e); } return audioBuffer; } private AudioEvent audioEventFromBuffer(ByteBuffer bb) { return AudioEvent.builder() .audioChunk(SdkBytes.fromByteBuffer(bb)) .build(); } } }Transcribe el audio en streaming desde el micrófono del equipo.
public class TranscribeStreamingDemoApp { private static final Region REGION = Region.US_EAST_1; private static TranscribeStreamingAsyncClient client; public static void main(String[] args) throws URISyntaxException, ExecutionException, InterruptedException, LineUnavailableException { client = TranscribeStreamingAsyncClient.builder() .credentialsProvider(getCredentials()) .region(REGION) .build(); CompletableFuture<Void> result = client.startStreamTranscription(getRequest(16_000), new AudioStreamPublisher(getStreamFromMic()), getResponseHandler()); result.get(); client.close(); } private static InputStream getStreamFromMic() throws LineUnavailableException { // Signed PCM AudioFormat with 16kHz, 16 bit sample size, mono int sampleRate = 16000; AudioFormat format = new AudioFormat(sampleRate, 16, 1, true, false); DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); if (!AudioSystem.isLineSupported(info)) { System.out.println("Line not supported"); System.exit(0); } TargetDataLine line = (TargetDataLine) AudioSystem.getLine(info); line.open(format); line.start(); InputStream audioStream = new AudioInputStream(line); return audioStream; } private static AwsCredentialsProvider getCredentials() { return DefaultCredentialsProvider.create(); } private static StartStreamTranscriptionRequest getRequest(Integer mediaSampleRateHertz) { return StartStreamTranscriptionRequest.builder() .languageCode(LanguageCode.EN_US.toString()) .mediaEncoding(MediaEncoding.PCM) .mediaSampleRateHertz(mediaSampleRateHertz) .build(); } private static StartStreamTranscriptionResponseHandler getResponseHandler() { return StartStreamTranscriptionResponseHandler.builder() .onResponse(r -> { System.out.println("Received Initial response"); }) .onError(e -> { System.out.println(e.getMessage()); StringWriter sw = new StringWriter(); e.printStackTrace(new PrintWriter(sw)); System.out.println("Error Occurred: " + sw); }) .onComplete(() -> { System.out.println("=== All records stream successfully ==="); }) .subscriber(event -> { List<Result> results = ((TranscriptEvent) event).transcript().results(); if (results.size() > 0) { if (!results.get(0).alternatives().get(0).transcript().isEmpty()) { System.out.println(results.get(0).alternatives().get(0).transcript()); } } }) .build(); } private static class AudioStreamPublisher implements Publisher<AudioStream> { private static Subscription currentSubscription; private final InputStream inputStream; private AudioStreamPublisher(InputStream inputStream) { this.inputStream = inputStream; } @Override public void subscribe(Subscriber<? super AudioStream> s) { if (currentSubscription == null) { currentSubscription = new SubscriptionImpl(s, inputStream); } else { currentSubscription.cancel(); currentSubscription = new SubscriptionImpl(s, inputStream); } s.onSubscribe(currentSubscription); } } public static class SubscriptionImpl implements Subscription { private static final int CHUNK_SIZE_IN_BYTES = 1024; private final Subscriber<? super AudioStream> subscriber; private final InputStream inputStream; private final ExecutorService executor = Executors.newFixedThreadPool(1); private final AtomicLong demand = new AtomicLong(0); SubscriptionImpl(Subscriber<? super AudioStream> s, InputStream inputStream) { this.subscriber = s; this.inputStream = inputStream; } @Override public void request(long n) { if (n <= 0) { subscriber.onError(new IllegalArgumentException("Demand must be positive")); } demand.getAndAdd(n); executor.submit(() -> { try { do { ByteBuffer audioBuffer = getNextEvent(); if (audioBuffer.remaining() > 0) { AudioEvent audioEvent = audioEventFromBuffer(audioBuffer); subscriber.onNext(audioEvent); } else { subscriber.onComplete(); break; } } while (demand.decrementAndGet() > 0); } catch (Exception e) { subscriber.onError(e); } }); } @Override public void cancel() { executor.shutdown(); } private ByteBuffer getNextEvent() { ByteBuffer audioBuffer = null; byte[] audioBytes = new byte[CHUNK_SIZE_IN_BYTES]; int len = 0; try { len = inputStream.read(audioBytes); if (len <= 0) { audioBuffer = ByteBuffer.allocate(0); } else { audioBuffer = ByteBuffer.wrap(audioBytes, 0, len); } } catch (IOException e) { throw new UncheckedIOException(e); } return audioBuffer; } private AudioEvent audioEventFromBuffer(ByteBuffer bb) { return AudioEvent.builder() .audioChunk(SdkBytes.fromByteBuffer(bb)) .build(); } } }-
Para obtener información sobre la API, consulte los siguientes temas en la Referencia de la API de AWS SDK for Java 2.x .
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