![](/img/trans.png)
[英]AWS Transcribe Error: Unable to determine service/operation name to be authorized
[英]AWS transcribe Unable to load credentials from any of the providers in the chain AwsCredentialsProviderChain
我正在運行一個使用 AWS TranscribeStreaming 的 java 程序。 我已經創建(從 AWS 控制台)並下載了 AWS_ACCESS_KEY_ID 和 AWS_SECRET_ACCESS_KEY 然后設置環境變量。 當我運行程序時,我收到錯誤消息:
無法從鏈 AwsCredentialsProviderChain 中的任何提供者加載憑證。
我不知道為什么,但是在使用 Google SDK 進行語音識別時也會發生此錯誤。
這是我要運行的代碼。
public class TranscribeStreamingDemoApp {
private static final Region REGION = Region.US_WEST_2;
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.FR_FR.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.toString());
})
.onComplete(() -> {
System.out.println("=== All records stream successfully ===");
})
.subscriber(event -> {
List<software.amazon.awssdk.services.transcribestreaming.model.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 InputStream getStreamFromFile(String audioFileName) {
try {
File inputFile = new File(getClass().getClassLoader().getResource(audioFileName).getFile());
InputStream audioStream = new FileInputStream(inputFile);
return audioStream;
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
}
}
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();
}
}
}
最后,我解決了這個問題,文檔指定:按以下順序查找憑證的 AWS 憑證提供程序鏈:1.Java 系統屬性 - aws.accessKeyId 和 aws.secretAccessKey 2.Environment 變量 - AWS_ACCESS_KEY_ID 和 AWS_SECRET_ACCESS_KEY 3.Credential 配置文件文件在所有 AWS 開發工具包和 AWS CLI 共享的默認位置 (~/.aws/credentials)
由於通過環境變量設置不起作用,我選擇使用 Java 系統屬性設置憑據,並且它可以工作:Doc ref: https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/auth /credentials/DefaultCredentialsProvider.html
System.setProperty("aws.accessKeyId", "**************");
System.setProperty("aws.secretAccessKey", "**************");
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