Riconoscimento di celebrità in un video archiviato

Per individuare le celebrità in un video archiviato in un bucket Amazon S3 (SDK)

1. Eseguire Analisi di un video archiviato in un bucket Amazon S3 con Java o Python () SDK.

2. Aggiungere il seguente codice alla classe VideoDetect creata nella fase 1.

   Java

           //Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
           //PDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-rekognition-developer-guide/blob/master/LICENSE-SAMPLECODE.)
   
         // Celebrities=====================================================================
         private static void StartCelebrityDetection(String bucket, String video) throws Exception{
       	  
               NotificationChannel channel= new NotificationChannel()
                       .withSNSTopicArn(snsTopicArn)
                       .withRoleArn(roleArn);
     
              StartCelebrityRecognitionRequest req = new StartCelebrityRecognitionRequest()
                    .withVideo(new Video()
                          .withS3Object(new S3Object()
                                .withBucket(bucket)
                                .withName(video)))
                    .withNotificationChannel(channel);
     
     
     
              StartCelebrityRecognitionResult startCelebrityRecognitionResult = rek.startCelebrityRecognition(req);
              startJobId=startCelebrityRecognitionResult.getJobId();
     
           } 
     
           private static void GetCelebrityDetectionResults() throws Exception{
     
              int maxResults=10;
              String paginationToken=null;
              GetCelebrityRecognitionResult celebrityRecognitionResult=null;
     
              do{
                 if (celebrityRecognitionResult !=null){
                    paginationToken = celebrityRecognitionResult.getNextToken();
                 }
                 celebrityRecognitionResult = rek.getCelebrityRecognition(new GetCelebrityRecognitionRequest()
                       .withJobId(startJobId)
                       .withNextToken(paginationToken)
                       .withSortBy(CelebrityRecognitionSortBy.TIMESTAMP)
                       .withMaxResults(maxResults));
     
     
                 System.out.println("File info for page");
                 VideoMetadata videoMetaData=celebrityRecognitionResult.getVideoMetadata();
     
                 System.out.println("Format: " + videoMetaData.getFormat());
                 System.out.println("Codec: " + videoMetaData.getCodec());
                 System.out.println("Duration: " + videoMetaData.getDurationMillis());
                 System.out.println("FrameRate: " + videoMetaData.getFrameRate());
     
                 System.out.println("Job");
     
                 System.out.println("Job status: " + celebrityRecognitionResult.getJobStatus());
     
     
                 //Show celebrities
                 List<CelebrityRecognition> celebs= celebrityRecognitionResult.getCelebrities();
     
                 for (CelebrityRecognition celeb: celebs) { 
                    long seconds=celeb.getTimestamp()/1000;
                    System.out.print("Sec: " + Long.toString(seconds) + " ");
                    CelebrityDetail details=celeb.getCelebrity();
                    System.out.println("Name: " + details.getName());
                    System.out.println("Id: " + details.getId());
                    System.out.println(); 
                 }
              } while (celebrityRecognitionResult !=null && celebrityRecognitionResult.getNextToken() != null);
     
           }
     

   Nella funzione main, sostituisci la riga:

           StartLabelDetection(bucket, video);
   
           if (GetSQSMessageSuccess()==true)
           	GetLabelDetectionResults();

   con:

           StartCelebrityDetection(bucket, video);
   
           if (GetSQSMessageSuccess()==true)
           	GetCelebrityDetectionResults();
          

   Java V2

   Questo codice è tratto dal repository degli esempi GitHub di AWS Documentation SDK. Guarda l'esempio completo qui.

   //snippet-start:[rekognition.java2.recognize_video_celebrity.import]
   import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
   import software.amazon.awssdk.regions.Region;
   import software.amazon.awssdk.services.rekognition.RekognitionClient;
   import software.amazon.awssdk.services.rekognition.model.S3Object;
   import software.amazon.awssdk.services.rekognition.model.NotificationChannel;
   import software.amazon.awssdk.services.rekognition.model.Video;
   import software.amazon.awssdk.services.rekognition.model.StartCelebrityRecognitionResponse;
   import software.amazon.awssdk.services.rekognition.model.RekognitionException;
   import software.amazon.awssdk.services.rekognition.model.CelebrityRecognitionSortBy;
   import software.amazon.awssdk.services.rekognition.model.VideoMetadata;
   import software.amazon.awssdk.services.rekognition.model.CelebrityRecognition;
   import software.amazon.awssdk.services.rekognition.model.CelebrityDetail;
   import software.amazon.awssdk.services.rekognition.model.StartCelebrityRecognitionRequest;
   import software.amazon.awssdk.services.rekognition.model.GetCelebrityRecognitionRequest;
   import software.amazon.awssdk.services.rekognition.model.GetCelebrityRecognitionResponse;
   import java.util.List;
   //snippet-end:[rekognition.java2.recognize_video_celebrity.import]
   
   /**
   *  To run this code example, ensure that you perform the Prerequisites as stated in the Amazon Rekognition Guide:
   *  https://docs.aws.amazon.com/rekognition/latest/dg/video-analyzing-with-sqs.html
   *
   * Also, ensure that set up your development environment, including your credentials.
   *
   * For information, see this documentation topic:
   *
   * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
   */
   
   public class RecognizeCelebritiesVideo {
   
   private static String startJobId ="";
   
   public static void main(String[] args) {
   
      final String usage = "\n" +
          "Usage: " +
          "   <bucket> <video> <topicArn> <roleArn>\n\n" +
          "Where:\n" +
          "   bucket - The name of the bucket in which the video is located (for example, (for example, myBucket). \n\n"+
          "   video - The name of video (for example, people.mp4). \n\n" +
          "   topicArn - The ARN of the Amazon Simple Notification Service (Amazon SNS) topic. \n\n" +
          "   roleArn - The ARN of the AWS Identity and Access Management (IAM) role to use. \n\n" ;
   
      if (args.length != 4) {
          System.out.println(usage);
          System.exit(1);
      }
   
      String bucket = args[0];
      String video = args[1];
      String topicArn = args[2];
      String roleArn = args[3];
      Region region = Region.US_EAST_1;
      RekognitionClient rekClient = RekognitionClient.builder()
          .region(region)
          .credentialsProvider(ProfileCredentialsProvider.create("profile-name"))
          .build();
   
     NotificationChannel channel = NotificationChannel.builder()
          .snsTopicArn(topicArn)
          .roleArn(roleArn)
          .build();
   
     StartCelebrityDetection(rekClient, channel, bucket, video);
     GetCelebrityDetectionResults(rekClient);
     System.out.println("This example is done!");
     rekClient.close();
   }
   
   // snippet-start:[rekognition.java2.recognize_video_celebrity.main]
   public static void StartCelebrityDetection(RekognitionClient rekClient,
                                              NotificationChannel channel,
                                              String bucket,
                                              String video){
      try {
          S3Object s3Obj = S3Object.builder()
              .bucket(bucket)
              .name(video)
              .build();
   
          Video vidOb = Video.builder()
              .s3Object(s3Obj)
              .build();
   
          StartCelebrityRecognitionRequest recognitionRequest = StartCelebrityRecognitionRequest.builder()
              .jobTag("Celebrities")
              .notificationChannel(channel)
              .video(vidOb)
              .build();
   
          StartCelebrityRecognitionResponse startCelebrityRecognitionResult = rekClient.startCelebrityRecognition(recognitionRequest);
          startJobId = startCelebrityRecognitionResult.jobId();
   
      } catch(RekognitionException e) {
          System.out.println(e.getMessage());
          System.exit(1);
      }
   }
   
   public static void GetCelebrityDetectionResults(RekognitionClient rekClient) {
   
      try {
          String paginationToken=null;
          GetCelebrityRecognitionResponse recognitionResponse = null;
          boolean finished = false;
          String status;
          int yy=0 ;
   
          do{
              if (recognitionResponse !=null)
                  paginationToken = recognitionResponse.nextToken();
   
              GetCelebrityRecognitionRequest recognitionRequest = GetCelebrityRecognitionRequest.builder()
                  .jobId(startJobId)
                  .nextToken(paginationToken)
                  .sortBy(CelebrityRecognitionSortBy.TIMESTAMP)
                  .maxResults(10)
                  .build();
   
              // Wait until the job succeeds
              while (!finished) {
                  recognitionResponse = rekClient.getCelebrityRecognition(recognitionRequest);
                  status = recognitionResponse.jobStatusAsString();
   
                  if (status.compareTo("SUCCEEDED") == 0)
                      finished = true;
                  else {
                      System.out.println(yy + " status is: " + status);
                      Thread.sleep(1000);
                  }
                  yy++;
              }
   
              finished = false;
   
              // Proceed when the job is done - otherwise VideoMetadata is null.
              VideoMetadata videoMetaData=recognitionResponse.videoMetadata();
              System.out.println("Format: " + videoMetaData.format());
              System.out.println("Codec: " + videoMetaData.codec());
              System.out.println("Duration: " + videoMetaData.durationMillis());
              System.out.println("FrameRate: " + videoMetaData.frameRate());
              System.out.println("Job");
   
              List<CelebrityRecognition> celebs= recognitionResponse.celebrities();
              for (CelebrityRecognition celeb: celebs) {
                  long seconds=celeb.timestamp()/1000;
                  System.out.print("Sec: " + seconds + " ");
                  CelebrityDetail details=celeb.celebrity();
                  System.out.println("Name: " + details.name());
                  System.out.println("Id: " + details.id());
                  System.out.println();
              }
   
          } while (recognitionResponse.nextToken() != null);
   
      } catch(RekognitionException | InterruptedException e) {
          System.out.println(e.getMessage());
          System.exit(1);
      }
   }
   // snippet-end:[rekognition.java2.recognize_video_celebrity.main]
   }

   Python

   #Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   #PDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-rekognition-developer-guide/blob/master/LICENSE-SAMPLECODE.)
   
       # ============== Celebrities ===============
       def StartCelebrityDetection(self):
           response=self.rek.start_celebrity_recognition(Video={'S3Object': {'Bucket': self.bucket, 'Name': self.video}},
               NotificationChannel={'RoleArn': self.roleArn, 'SNSTopicArn': self.snsTopicArn})
   
           self.startJobId=response['JobId']
           print('Start Job Id: ' + self.startJobId)
   
       def GetCelebrityDetectionResults(self):
           maxResults = 10
           paginationToken = ''
           finished = False
   
           while finished == False:
               response = self.rek.get_celebrity_recognition(JobId=self.startJobId,
                                                       MaxResults=maxResults,
                                                       NextToken=paginationToken)
   
               print(response['VideoMetadata']['Codec'])
               print(str(response['VideoMetadata']['DurationMillis']))
               print(response['VideoMetadata']['Format'])
               print(response['VideoMetadata']['FrameRate'])
   
               for celebrityRecognition in response['Celebrities']:
                   print('Celebrity: ' +
                       str(celebrityRecognition['Celebrity']['Name']))
                   print('Timestamp: ' + str(celebrityRecognition['Timestamp']))
                   print()
   
               if 'NextToken' in response:
                   paginationToken = response['NextToken']
               else:
                   finished = True

   Nella funzione main, sostituisci le righe:

       analyzer.StartLabelDetection()
       if analyzer.GetSQSMessageSuccess()==True:
           analyzer.GetLabelDetectionResults()

   con:

       analyzer.StartCelebrityDetection()
       if analyzer.GetSQSMessageSuccess()==True:
           analyzer.GetCelebrityDetectionResults()

   Node.JS

   Nel seguente esempio di codice Node.Js, sostituisci il valore di bucket con il nome del bucket S3 contenente il tuo video e il valore di videoName con il nome del file video. Dovrai inoltre sostituire il valore di roleArn con l'ARN associato al tuo ruolo di servizio IAM. Infine, sostituisci il valore di region con il nome della regione operativa associata al tuo account. Sostituisci il valore di profile_name nella riga che crea la sessione di Rekognition con il nome del tuo profilo di sviluppatore.

   //Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   //PDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-rekognition-developer-guide/blob/master/LICENSE-SAMPLECODE.)
   
   // Import required AWS SDK clients and commands for Node.js
   import { CreateQueueCommand, GetQueueAttributesCommand, GetQueueUrlCommand, 
     SetQueueAttributesCommand, DeleteQueueCommand, ReceiveMessageCommand, DeleteMessageCommand } from  "@aws-sdk/client-sqs";
   import {CreateTopicCommand, SubscribeCommand, DeleteTopicCommand } from "@aws-sdk/client-sns";
   import  { SQSClient } from "@aws-sdk/client-sqs";
   import  { SNSClient } from "@aws-sdk/client-sns";
   import  { RekognitionClient, StartLabelDetectionCommand, GetLabelDetectionCommand, 
     StartCelebrityRecognitionCommand, GetCelebrityRecognitionCommand} from "@aws-sdk/client-rekognition";
   import { stdout } from "process";
   import {fromIni} from '@aws-sdk/credential-providers';
   
   // Set the AWS Region.
   const REGION = "region-name"; //e.g. "us-east-1"
   // Set the profile name
   const profileName = "profile-name"
   // Name the collection
   // Create SNS service object.
   const sqsClient = new SQSClient({ region: REGION, 
     credentials: fromIni({profile: profileName,}), });
   const snsClient = new SNSClient({ region: REGION, 
     credentials: fromIni({profile: profileName,}), });
   const rekClient = new RekognitionClient({region: REGION, 
     credentials: fromIni({profile: profileName,}), 
   });
   
   // Set bucket and video variables
   const bucket = "bucket-name";
   const videoName = "video-name";
   const roleArn = "role-arn"
   var startJobId = ""
   
   var ts = Date.now();
   const snsTopicName = "AmazonRekognitionExample" + ts;
   const snsTopicParams = {Name: snsTopicName}
   const sqsQueueName = "AmazonRekognitionQueue-" + ts;
   
    // Set the parameters
    const sqsParams = {
     QueueName: sqsQueueName, //SQS_QUEUE_URL
     Attributes: {
       DelaySeconds: "60", // Number of seconds delay.
       MessageRetentionPeriod: "86400", // Number of seconds delay.
     },
   };
   
   const createTopicandQueue = async () => {
     try {
       // Create SNS topic
       const topicResponse = await snsClient.send(new CreateTopicCommand(snsTopicParams));
       const topicArn = topicResponse.TopicArn
       console.log("Success", topicResponse);
       // Create SQS Queue
       const sqsResponse = await sqsClient.send(new CreateQueueCommand(sqsParams));
       console.log("Success", sqsResponse);
       const sqsQueueCommand = await sqsClient.send(new GetQueueUrlCommand({QueueName: sqsQueueName}))
       const sqsQueueUrl = sqsQueueCommand.QueueUrl
       const attribsResponse = await sqsClient.send(new GetQueueAttributesCommand({QueueUrl: sqsQueueUrl, AttributeNames: ['QueueArn']}))
       const attribs = attribsResponse.Attributes
       console.log(attribs)
       const queueArn = attribs.QueueArn
       // subscribe SQS queue to SNS topic
       const subscribed = await snsClient.send(new SubscribeCommand({TopicArn: topicArn, Protocol:'sqs', Endpoint: queueArn}))
       const policy = {
         Version: "2012-10-17",
         Statement: [
           {
             Sid: "MyPolicy",
             Effect: "Allow",
             Principal: {AWS: "*"},
             Action: "SQS:SendMessage",
             Resource: queueArn,
             Condition: {
               ArnEquals: {
                 'aws:SourceArn': topicArn
               }
             }
           }
         ]
       };
   
       const response = sqsClient.send(new SetQueueAttributesCommand({QueueUrl: sqsQueueUrl, Attributes: {Policy: JSON.stringify(policy)}}))
       console.log(response)
       console.log(sqsQueueUrl, topicArn)
       return [sqsQueueUrl, topicArn]
   
     } catch (err) {
       console.log("Error", err);
     }
   };
   
   const startCelebrityDetection = async(roleArn, snsTopicArn) =>{
     try {
         //Initiate label detection and update value of startJobId with returned Job ID
         const response = await rekClient.send(new StartCelebrityRecognitionCommand({Video:{S3Object:{Bucket:bucket, Name:videoName}},
             NotificationChannel:{RoleArn: roleArn, SNSTopicArn: snsTopicArn}}))
             startJobId = response.JobId
             console.log(`Start Job ID: ${startJobId}`)
             return startJobId
       } catch (err) {
         console.log("Error", err);
       }
     };
   
   const getCelebrityRecognitionResults = async(startJobId) =>{
     try {
         //Initiate label detection and update value of startJobId with returned Job ID
         var maxResults = 10
         var paginationToken = ''
         var finished = false
   
         while (finished == false){
             var response = await rekClient.send(new GetCelebrityRecognitionCommand({JobId: startJobId, MaxResults: maxResults, 
                 NextToken: paginationToken}))
             console.log(response.VideoMetadata.Codec)
             console.log(response.VideoMetadata.DurationMillis)
             console.log(response.VideoMetadata.Format)
             console.log(response.VideoMetadata.FrameRate)
             response.Celebrities.forEach(celebrityRecognition => {
                 console.log(`Celebrity: ${celebrityRecognition.Celebrity.Name}`)
                 console.log(`Timestamp: ${celebrityRecognition.Timestamp}`)
                 console.log()
             })
             // Searh for pagination token, if found, set variable to next token
             if (String(response).includes("NextToken")){
                 paginationToken = response.NextToken
         
             }else{
                 finished = true
             }
         }
       } catch (err) {
         console.log("Error", err);
       }
     };
   
   // Checks for status of job completion
   const getSQSMessageSuccess = async(sqsQueueUrl, startJobId) => {
     try {
       // Set job found and success status to false initially
       var jobFound = false
       var succeeded = false
       var dotLine = 0
       // while not found, continue to poll for response
       while (jobFound == false){
         var sqsReceivedResponse = await sqsClient.send(new ReceiveMessageCommand({QueueUrl:sqsQueueUrl, 
           MaxNumberOfMessages:'ALL', MaxNumberOfMessages:10}));
         if (sqsReceivedResponse){
           var responseString = JSON.stringify(sqsReceivedResponse)
           if (!responseString.includes('Body')){
             if (dotLine < 40) {
               console.log('.')
               dotLine = dotLine + 1
             }else {
               console.log('')
               dotLine = 0 
             };
             stdout.write('', () => {
               console.log('');
             });
             await new Promise(resolve => setTimeout(resolve, 5000));
             continue
           }
         }
   
         // Once job found, log Job ID and return true if status is succeeded
         for (var message of sqsReceivedResponse.Messages){
           console.log("Retrieved messages:")
           var notification = JSON.parse(message.Body)
           var rekMessage = JSON.parse(notification.Message)
           var messageJobId = rekMessage.JobId
           if (String(rekMessage.JobId).includes(String(startJobId))){
             console.log('Matching job found:')
             console.log(rekMessage.JobId)
             jobFound = true
             console.log(rekMessage.Status)
             if (String(rekMessage.Status).includes(String("SUCCEEDED"))){
               succeeded = true
               console.log("Job processing succeeded.")
               var sqsDeleteMessage = await sqsClient.send(new DeleteMessageCommand({QueueUrl:sqsQueueUrl, ReceiptHandle:message.ReceiptHandle}));
             }
           }else{
             console.log("Provided Job ID did not match returned ID.")
             var sqsDeleteMessage = await sqsClient.send(new DeleteMessageCommand({QueueUrl:sqsQueueUrl, ReceiptHandle:message.ReceiptHandle}));
           }
         }
       }
     return succeeded
     } catch(err) {
       console.log("Error", err);
     }
   };
   
   // Start label detection job, sent status notification, check for success status
   // Retrieve results if status is "SUCEEDED", delete notification queue and topic
   const runCelebRecognitionAndGetResults = async () => {
     try {
       const sqsAndTopic = await createTopicandQueue();
       //const startLabelDetectionRes = await startLabelDetection(roleArn, sqsAndTopic[1]);
       //const getSQSMessageStatus = await getSQSMessageSuccess(sqsAndTopic[0], startLabelDetectionRes)
       const startCelebrityDetectionRes = await startCelebrityDetection(roleArn, sqsAndTopic[1]);
       const getSQSMessageStatus = await getSQSMessageSuccess(sqsAndTopic[0], startCelebrityDetectionRes)
       console.log(getSQSMessageSuccess)
       if (getSQSMessageSuccess){
         console.log("Retrieving results:")
         const results = await getCelebrityRecognitionResults(startCelebrityDetectionRes)
       }
       const deleteQueue = await sqsClient.send(new DeleteQueueCommand({QueueUrl: sqsAndTopic[0]}));
       const deleteTopic = await snsClient.send(new DeleteTopicCommand({TopicArn: sqsAndTopic[1]}));
       console.log("Successfully deleted.")
     } catch (err) {
       console.log("Error", err);
     }
   };
   
   runCelebRecognitionAndGetResults()

   CLI

   Esegui il comando AWS CLI riportato di seguito per iniziare a rilevare le celebrità in un video.

   aws rekognition start-celebrity-recognition --video "{"S3Object":{"Bucket":"bucket-name","Name":"video-name"}}" \
   --notification-channel "{"SNSTopicArn":"topic-arn","RoleArn":"role-arn"}" \
   --region region-name --profile profile-name

   Aggiorna i seguenti valori:

   • Modifica bucket-name e video-name con il nome del bucket Amazon S3 e il nome del file specificati nella fase 2.

   • Cambia region-name con la regione AWS che stai utilizzando.

   • Sostituisci il valore di profile-name con il nome del tuo profilo di sviluppatore.

   • Cambia topic-ARN con l'ARN dell'argomento Amazon SNS creato nella fase 3 di Configurazione di Video Amazon Rekognition.

   • Modifica role-ARN con l'ARN del ruolo di servizio IAM creato nella fase 7 di Configurazione di Video Amazon Rekognition.

   Se accedi alla CLI da un dispositivo Windows, usa le virgolette doppie anziché le virgolette singole ed evita le virgolette doppie interne tramite barra rovesciata (ovvero, \) per risolvere eventuali errori del parser che potresti riscontrare. Un esempio è fornito di seguito:

   aws rekognition start-celebrity-recognition --video "{\"S3Object\":{\"Bucket\":\"bucket-name\",\"Name\":\"video-name\"}}" \
   --notification-channel "{\"SNSTopicArn\":\"topic-arn\",\"RoleArn\":\"role-arn\"}" \
   --region region-name --profile profile-name
                   

   Dopo aver eseguito l'esempio di codice precedente, copia il jobID restituito e inseriscilo nel comando GetCelebrityRecognition di seguito per ottenere i risultati, sostituendo job-id-number con il jobID ricevuto in precedenza:

   aws rekognition get-celebrity-recognition --job-id job-id-number --profile profile-name                               
                               

   Nota

   Se hai già eseguito un video di esempio diverso da Analisi di un video archiviato in un bucket Amazon S3 con Java o Python () SDK, il codice da sostituire potrebbe essere diverso.

3. Eseguire il codice. Vengono visualizzate le informazioni sui volti celebri riconosciuti nel video.