翻訳は機械翻訳により提供されています。提供された翻訳内容と英語版の間で齟齬、不一致または矛盾がある場合、英語版が優先します。
Java または Python を使用した、Amazon S3 バケットに保存されたビデオの分析 (SDK)
この手順では、Amazon Rekognition Video ラベル検出オペレーション、Amazon S3 バケットに保存さされたビデオ、および Amazon SNS トピックを使用して、ビデオ内のラベルを検出する方法について説明します。また、Amazon SQS キューを使用して Amazon SNS トピックから完了ステータスを取得する方法についても説明します。詳細については、「Amazon Rekognition Video オペレーションを呼び出す」を参照してください。Amazon SQS キューの使用に制限されるわけではありません。例えば、AWS Lambda 関数を使用して完了ステータスを取得することができます。詳細については、「Amazon SNS 通知を使用した Lambda 関数の呼び出し」を参照してください。
手順に含まれているコード例は、以下を実行する方法を示しています。
-
Amazon SNS トピックを作成します。
-
Amazon SQS キュー を作成します。
-
Amazon Rekognition Video に、ビデオ分析オペレーションの完了ステータスを Amazon SNS トピックに発行するアクセス許可を与えます。
-
Amazon SQS キューを Amazon SNS トピックへサブスクライブします。
-
StartLabelDetection を呼び出してビデオ分析リクエストを開始します。
-
完了ステータスを Amazon SQS キューから取得します。この例では、
StartLabelDetectionで返されたジョブ識別子 (JobId) を追跡し、一致するジョブ識別子の結果だけを完了ステータスから読み取ります。他のアプリケーションで同じキューやトピックを使用している場合、この点を考慮することが重要です。わかりやすいように、この例では一致しないジョブが削除されます。これらを Amazon SQS デッドレターキューに追加して詳しく調査することを検討してください。 -
GetLabelDetection を呼び出して、ビデオ分析結果を取得、表示します。
前提条件
この手順のコード例は Java と Python で提供されています。適切な AWS SDK がインストールされている必要があります。詳細については、「Amazon Rekognition の開始方法」を参照してください。使用する AWS アカウントには、Amazon Rekognition API に対するアクセス許可が必要です。詳細については、[Amazon Rekognition で定義されるアクション] を参照してください。
ビデオ内のラベルを検出するには
-
Amazon Rekognition Video へのユーザーアクセスを設定し、Amazon SNS への Amazon Rekognition Video アクセスを設定します。詳細については、「Amazon Rekognition Video の設定」を参照してください。コード例によって Amazon SNS トピックと Amazon SQS キューが作成されて設定されるため、ステップ 3、4、5、6 を実行する必要はありません。
-
Amazon S3 バケットに MOV または MPEG- 4 形式のビデオファイルをアップロードします。テストの場合、長さが 30 秒以内のビデオをアップロードしてください。
手順については、[Amazon Simple Storage Service ユーザーガイド] の [Amazon S3 へのオブジェクトのアップロード] を参照してください。
-
次のコード例を使用して、ビデオ内のラベルを検出します。
- Java
-
main関数内:-
roleArnを、Amazon Rekognition Video を設定するには のステップ 7 で作成した IAM サービスロールの ARN に置き換えます。 -
bucketとvideoの値を、ステップ 2 で指定したバケット名とビデオファイル名に置き換えます。
//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.) package com.amazonaws.samples; import com.amazonaws.auth.policy.Policy; import com.amazonaws.auth.policy.Condition; import com.amazonaws.auth.policy.Principal; import com.amazonaws.auth.policy.Resource; import com.amazonaws.auth.policy.Statement; import com.amazonaws.auth.policy.Statement.Effect; import com.amazonaws.auth.policy.actions.SQSActions; import com.amazonaws.services.rekognition.AmazonRekognition; import com.amazonaws.services.rekognition.AmazonRekognitionClientBuilder; import com.amazonaws.services.rekognition.model.CelebrityDetail; import com.amazonaws.services.rekognition.model.CelebrityRecognition; import com.amazonaws.services.rekognition.model.CelebrityRecognitionSortBy; import com.amazonaws.services.rekognition.model.ContentModerationDetection; import com.amazonaws.services.rekognition.model.ContentModerationSortBy; import com.amazonaws.services.rekognition.model.Face; import com.amazonaws.services.rekognition.model.FaceDetection; import com.amazonaws.services.rekognition.model.FaceMatch; import com.amazonaws.services.rekognition.model.FaceSearchSortBy; import com.amazonaws.services.rekognition.model.GetCelebrityRecognitionRequest; import com.amazonaws.services.rekognition.model.GetCelebrityRecognitionResult; import com.amazonaws.services.rekognition.model.GetContentModerationRequest; import com.amazonaws.services.rekognition.model.GetContentModerationResult; import com.amazonaws.services.rekognition.model.GetFaceDetectionRequest; import com.amazonaws.services.rekognition.model.GetFaceDetectionResult; import com.amazonaws.services.rekognition.model.GetFaceSearchRequest; import com.amazonaws.services.rekognition.model.GetFaceSearchResult; import com.amazonaws.services.rekognition.model.GetLabelDetectionRequest; import com.amazonaws.services.rekognition.model.GetLabelDetectionResult; import com.amazonaws.services.rekognition.model.GetPersonTrackingRequest; import com.amazonaws.services.rekognition.model.GetPersonTrackingResult; import com.amazonaws.services.rekognition.model.Instance; import com.amazonaws.services.rekognition.model.Label; import com.amazonaws.services.rekognition.model.LabelDetection; import com.amazonaws.services.rekognition.model.LabelDetectionSortBy; import com.amazonaws.services.rekognition.model.NotificationChannel; import com.amazonaws.services.rekognition.model.Parent; import com.amazonaws.services.rekognition.model.PersonDetection; import com.amazonaws.services.rekognition.model.PersonMatch; import com.amazonaws.services.rekognition.model.PersonTrackingSortBy; import com.amazonaws.services.rekognition.model.S3Object; import com.amazonaws.services.rekognition.model.StartCelebrityRecognitionRequest; import com.amazonaws.services.rekognition.model.StartCelebrityRecognitionResult; import com.amazonaws.services.rekognition.model.StartContentModerationRequest; import com.amazonaws.services.rekognition.model.StartContentModerationResult; import com.amazonaws.services.rekognition.model.StartFaceDetectionRequest; import com.amazonaws.services.rekognition.model.StartFaceDetectionResult; import com.amazonaws.services.rekognition.model.StartFaceSearchRequest; import com.amazonaws.services.rekognition.model.StartFaceSearchResult; import com.amazonaws.services.rekognition.model.StartLabelDetectionRequest; import com.amazonaws.services.rekognition.model.StartLabelDetectionResult; import com.amazonaws.services.rekognition.model.StartPersonTrackingRequest; import com.amazonaws.services.rekognition.model.StartPersonTrackingResult; import com.amazonaws.services.rekognition.model.Video; import com.amazonaws.services.rekognition.model.VideoMetadata; import com.amazonaws.services.sns.AmazonSNS; import com.amazonaws.services.sns.AmazonSNSClientBuilder; import com.amazonaws.services.sns.model.CreateTopicRequest; import com.amazonaws.services.sns.model.CreateTopicResult; import com.amazonaws.services.sqs.AmazonSQS; import com.amazonaws.services.sqs.AmazonSQSClientBuilder; import com.amazonaws.services.sqs.model.CreateQueueRequest; import com.amazonaws.services.sqs.model.Message; import com.amazonaws.services.sqs.model.QueueAttributeName; import com.amazonaws.services.sqs.model.SetQueueAttributesRequest; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import java.util.*; public class VideoDetect { private static String sqsQueueName=null; private static String snsTopicName=null; private static String snsTopicArn = null; private static String roleArn= null; private static String sqsQueueUrl = null; private static String sqsQueueArn = null; private static String startJobId = null; private static String bucket = null; private static String video = null; private static AmazonSQS sqs=null; private static AmazonSNS sns=null; private static AmazonRekognition rek = null; private static NotificationChannel channel= new NotificationChannel() .withSNSTopicArn(snsTopicArn) .withRoleArn(roleArn); public static void main(String[] args) throws Exception { video = ""; bucket = ""; roleArn= ""; sns = AmazonSNSClientBuilder.defaultClient(); sqs= AmazonSQSClientBuilder.defaultClient(); rek = AmazonRekognitionClientBuilder.defaultClient(); CreateTopicandQueue(); //================================================= StartLabelDetection(bucket, video); if (GetSQSMessageSuccess()==true) GetLabelDetectionResults(); //================================================= DeleteTopicandQueue(); System.out.println("Done!"); } static boolean GetSQSMessageSuccess() throws Exception { boolean success=false; System.out.println("Waiting for job: " + startJobId); //Poll queue for messages List<Message> messages=null; int dotLine=0; boolean jobFound=false; //loop until the job status is published. Ignore other messages in queue. do{ messages = sqs.receiveMessage(sqsQueueUrl).getMessages(); if (dotLine++<40){ System.out.print("."); }else{ System.out.println(); dotLine=0; } if (!messages.isEmpty()) { //Loop through messages received. for (Message message: messages) { String notification = message.getBody(); // Get status and job id from notification. ObjectMapper mapper = new ObjectMapper(); JsonNode jsonMessageTree = mapper.readTree(notification); JsonNode messageBodyText = jsonMessageTree.get("Message"); ObjectMapper operationResultMapper = new ObjectMapper(); JsonNode jsonResultTree = operationResultMapper.readTree(messageBodyText.textValue()); JsonNode operationJobId = jsonResultTree.get("JobId"); JsonNode operationStatus = jsonResultTree.get("Status"); System.out.println("Job found was " + operationJobId); // Found job. Get the results and display. if(operationJobId.asText().equals(startJobId)){ jobFound=true; System.out.println("Job id: " + operationJobId ); System.out.println("Status : " + operationStatus.toString()); if (operationStatus.asText().equals("SUCCEEDED")){ success=true; } else{ System.out.println("Video analysis failed"); } sqs.deleteMessage(sqsQueueUrl,message.getReceiptHandle()); } else{ System.out.println("Job received was not job " + startJobId); //Delete unknown message. Consider moving message to dead letter queue sqs.deleteMessage(sqsQueueUrl,message.getReceiptHandle()); } } } else { Thread.sleep(5000); } } while (!jobFound); System.out.println("Finished processing video"); return success; } private static void StartLabelDetection(String bucket, String video) throws Exception{ NotificationChannel channel= new NotificationChannel() .withSNSTopicArn(snsTopicArn) .withRoleArn(roleArn); StartLabelDetectionRequest req = new StartLabelDetectionRequest() .withVideo(new Video() .withS3Object(new S3Object() .withBucket(bucket) .withName(video))) .withMinConfidence(50F) .withJobTag("DetectingLabels") .withNotificationChannel(channel); StartLabelDetectionResult startLabelDetectionResult = rek.startLabelDetection(req); startJobId=startLabelDetectionResult.getJobId(); } private static void GetLabelDetectionResults() throws Exception{ int maxResults=10; String paginationToken=null; GetLabelDetectionResult labelDetectionResult=null; do { if (labelDetectionResult !=null){ paginationToken = labelDetectionResult.getNextToken(); } GetLabelDetectionRequest labelDetectionRequest= new GetLabelDetectionRequest() .withJobId(startJobId) .withSortBy(LabelDetectionSortBy.TIMESTAMP) .withMaxResults(maxResults) .withNextToken(paginationToken); labelDetectionResult = rek.getLabelDetection(labelDetectionRequest); VideoMetadata videoMetaData=labelDetectionResult.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()); //Show labels, confidence and detection times List<LabelDetection> detectedLabels= labelDetectionResult.getLabels(); for (LabelDetection detectedLabel: detectedLabels) { long seconds=detectedLabel.getTimestamp(); Label label=detectedLabel.getLabel(); System.out.println("Millisecond: " + Long.toString(seconds) + " "); System.out.println(" Label:" + label.getName()); System.out.println(" Confidence:" + detectedLabel.getLabel().getConfidence().toString()); List<Instance> instances = label.getInstances(); System.out.println(" Instances of " + label.getName()); if (instances.isEmpty()) { System.out.println(" " + "None"); } else { for (Instance instance : instances) { System.out.println(" Confidence: " + instance.getConfidence().toString()); System.out.println(" Bounding box: " + instance.getBoundingBox().toString()); } } System.out.println(" Parent labels for " + label.getName() + ":"); List<Parent> parents = label.getParents(); if (parents.isEmpty()) { System.out.println(" None"); } else { for (Parent parent : parents) { System.out.println(" " + parent.getName()); } } System.out.println(); } } while (labelDetectionResult !=null && labelDetectionResult.getNextToken() != null); } // Creates an SNS topic and SQS queue. The queue is subscribed to the topic. static void CreateTopicandQueue() { //create a new SNS topic snsTopicName="AmazonRekognitionTopic" + Long.toString(System.currentTimeMillis()); CreateTopicRequest createTopicRequest = new CreateTopicRequest(snsTopicName); CreateTopicResult createTopicResult = sns.createTopic(createTopicRequest); snsTopicArn=createTopicResult.getTopicArn(); //Create a new SQS Queue sqsQueueName="AmazonRekognitionQueue" + Long.toString(System.currentTimeMillis()); final CreateQueueRequest createQueueRequest = new CreateQueueRequest(sqsQueueName); sqsQueueUrl = sqs.createQueue(createQueueRequest).getQueueUrl(); sqsQueueArn = sqs.getQueueAttributes(sqsQueueUrl, Arrays.asList("QueueArn")).getAttributes().get("QueueArn"); //Subscribe SQS queue to SNS topic String sqsSubscriptionArn = sns.subscribe(snsTopicArn, "sqs", sqsQueueArn).getSubscriptionArn(); // Authorize queue Policy policy = new Policy().withStatements( new Statement(Effect.Allow) .withPrincipals(Principal.AllUsers) .withActions(SQSActions.SendMessage) .withResources(new Resource(sqsQueueArn)) .withConditions(new Condition().withType("ArnEquals").withConditionKey("aws:SourceArn").withValues(snsTopicArn)) ); Map queueAttributes = new HashMap(); queueAttributes.put(QueueAttributeName.Policy.toString(), policy.toJson()); sqs.setQueueAttributes(new SetQueueAttributesRequest(sqsQueueUrl, queueAttributes)); System.out.println("Topic arn: " + snsTopicArn); System.out.println("Queue arn: " + sqsQueueArn); System.out.println("Queue url: " + sqsQueueUrl); System.out.println("Queue sub arn: " + sqsSubscriptionArn ); } static void DeleteTopicandQueue() { if (sqs !=null) { sqs.deleteQueue(sqsQueueUrl); System.out.println("SQS queue deleted"); } if (sns!=null) { sns.deleteTopic(snsTopicArn); System.out.println("SNS topic deleted"); } } } -
- Python
-
main関数内:-
roleArnを、Amazon Rekognition Video を設定するには のステップ 7 で作成した IAM サービスロールの ARN に置き換えます。 -
bucketとvideoの値を、ステップ 2 で指定したバケット名とビデオファイル名に置き換えます。 -
Rekognition セッションを作成する行の
profile_nameの値を、自分のデベロッパープロファイル名に置き換えます。 -
設定パラメータにフィルター条件を含めることもできます。例えば、目的の値のリストと共に
LabelsInclusionFilterまたはLabelsExclusionFilterを使用できます。以下のコードでは、FeaturesとSettingsセクションのコメントを外して独自の値を指定することで、返される結果を興味のあるラベルだけに制限できます。 -
GetLabelDetectionの呼び出しでは、SortByおよびAggregateBy引数の値を指定できます。時間で並べ替える場合は、SortBy入力パラメータの値をTIMESTAMPに設定します。エンティティで並べ替えるには、実行するオペレーションにとって適切な値をSortBy入力パラメータで使用します。結果をタイムスタンプ別に集計するには、AggregateByパラメータの値をTIMESTAMPSに設定します。ビデオセグメント別に集計するには、SEGMENTSを使用します。
## 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 boto3 import json import sys import time class VideoDetect: jobId = '' roleArn = '' bucket = '' video = '' startJobId = '' sqsQueueUrl = '' snsTopicArn = '' processType = '' def __init__(self, role, bucket, video, client, rek, sqs, sns): self.roleArn = role self.bucket = bucket self.video = video self.client = client self.rek = rek self.sqs = sqs self.sns = sns def GetSQSMessageSuccess(self): jobFound = False succeeded = False dotLine = 0 while jobFound == False: sqsResponse = self.sqs.receive_message(QueueUrl=self.sqsQueueUrl, MessageAttributeNames=['ALL'], MaxNumberOfMessages=10) if sqsResponse: if 'Messages' not in sqsResponse: if dotLine < 40: print('.', end='') dotLine = dotLine + 1 else: print() dotLine = 0 sys.stdout.flush() time.sleep(5) continue for message in sqsResponse['Messages']: notification = json.loads(message['Body']) rekMessage = json.loads(notification['Message']) print(rekMessage['JobId']) print(rekMessage['Status']) if rekMessage['JobId'] == self.startJobId: print('Matching Job Found:' + rekMessage['JobId']) jobFound = True if (rekMessage['Status'] == 'SUCCEEDED'): succeeded = True self.sqs.delete_message(QueueUrl=self.sqsQueueUrl, ReceiptHandle=message['ReceiptHandle']) else: print("Job didn't match:" + str(rekMessage['JobId']) + ' : ' + self.startJobId) # Delete the unknown message. Consider sending to dead letter queue self.sqs.delete_message(QueueUrl=self.sqsQueueUrl, ReceiptHandle=message['ReceiptHandle']) return succeeded def StartLabelDetection(self): response = self.rek.start_label_detection(Video={'S3Object': {'Bucket': self.bucket, 'Name': self.video}}, NotificationChannel={'RoleArn': self.roleArn, 'SNSTopicArn': self.snsTopicArn}, MinConfidence=90, # Filtration options, uncomment and add desired labels to filter returned labels # Features=['GENERAL_LABELS'], # Settings={ # 'GeneralLabels': { # 'LabelInclusionFilters': ['Clothing'] # }} ) self.startJobId = response['JobId'] print('Start Job Id: ' + self.startJobId) def GetLabelDetectionResults(self): maxResults = 10 paginationToken = '' finished = False while finished == False: response = self.rek.get_label_detection(JobId=self.startJobId, MaxResults=maxResults, NextToken=paginationToken, SortBy='TIMESTAMP', AggregateBy="TIMESTAMPS") print('Codec: ' + response['VideoMetadata']['Codec']) print('Duration: ' + str(response['VideoMetadata']['DurationMillis'])) print('Format: ' + response['VideoMetadata']['Format']) print('Frame rate: ' + str(response['VideoMetadata']['FrameRate'])) print() for labelDetection in response['Labels']: label = labelDetection['Label'] print("Timestamp: " + str(labelDetection['Timestamp'])) print(" Label: " + label['Name']) print(" Confidence: " + str(label['Confidence'])) print(" Instances:") for instance in label['Instances']: print(" Confidence: " + str(instance['Confidence'])) print(" Bounding box") print(" Top: " + str(instance['BoundingBox']['Top'])) print(" Left: " + str(instance['BoundingBox']['Left'])) print(" Width: " + str(instance['BoundingBox']['Width'])) print(" Height: " + str(instance['BoundingBox']['Height'])) print() print() print("Parents:") for parent in label['Parents']: print(" " + parent['Name']) print("Aliases:") for alias in label['Aliases']: print(" " + alias['Name']) print("Categories:") for category in label['Categories']: print(" " + category['Name']) print("----------") print() if 'NextToken' in response: paginationToken = response['NextToken'] else: finished = True def CreateTopicandQueue(self): millis = str(int(round(time.time() * 1000))) # Create SNS topic snsTopicName = "AmazonRekognitionExample" + millis topicResponse = self.sns.create_topic(Name=snsTopicName) self.snsTopicArn = topicResponse['TopicArn'] # create SQS queue sqsQueueName = "AmazonRekognitionQueue" + millis self.sqs.create_queue(QueueName=sqsQueueName) self.sqsQueueUrl = self.sqs.get_queue_url(QueueName=sqsQueueName)['QueueUrl'] attribs = self.sqs.get_queue_attributes(QueueUrl=self.sqsQueueUrl, AttributeNames=['QueueArn'])['Attributes'] sqsQueueArn = attribs['QueueArn'] # Subscribe SQS queue to SNS topic self.sns.subscribe( TopicArn=self.snsTopicArn, Protocol='sqs', Endpoint=sqsQueueArn) # Authorize SNS to write SQS queue policy = """{{ "Version":"2012-10-17", "Statement":[ {{ "Sid":"MyPolicy", "Effect":"Allow", "Principal" : {{"AWS" : "*"}}, "Action":"SQS:SendMessage", "Resource": "{}", "Condition":{{ "ArnEquals":{{ "aws:SourceArn": "{}" }} }} }} ] }}""".format(sqsQueueArn, self.snsTopicArn) response = self.sqs.set_queue_attributes( QueueUrl=self.sqsQueueUrl, Attributes={ 'Policy': policy }) def DeleteTopicandQueue(self): self.sqs.delete_queue(QueueUrl=self.sqsQueueUrl) self.sns.delete_topic(TopicArn=self.snsTopicArn) def main(): roleArn = 'role-arn' bucket = 'bucket-name' video = 'video-name' session = boto3.Session(profile_name='profile-name') client = session.client('rekognition') rek = boto3.client('rekognition') sqs = boto3.client('sqs') sns = boto3.client('sns') analyzer = VideoDetect(roleArn, bucket, video, client, rek, sqs, sns) analyzer.CreateTopicandQueue() analyzer.StartLabelDetection() if analyzer.GetSQSMessageSuccess() == True: analyzer.GetLabelDetectionResults() analyzer.DeleteTopicandQueue() if __name__ == "__main__": main() -
- Node.Js
-
次のサンプルコードでは
-
REGIONの値を、アカウントのオペレーティングリージョンの名前に置き換えます。 -
bucketの値を、ビデオファイルが保存されているAmazon S3 バケットの名前に置き換えます。 -
videoNameの値を、Amazon S3 バケット内のビデオファイル名に置き換えます。 -
Rekognition セッションを作成する行の
profile_nameの値を、自分のデベロッパープロファイル名に置き換えます。 -
roleArnを、Amazon Rekognition Video を設定するには のステップ 7 で作成した IAM サービスロールの ARN に置き換えます。
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 } 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" const profileName = "profile-name" // 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 startLabelDetection = async (roleArn, snsTopicArn) => { try { //Initiate label detection and update value of startJobId with returned Job ID const labelDetectionResponse = await rekClient.send(new StartLabelDetectionCommand({Video:{S3Object:{Bucket:bucket, Name:videoName}}, NotificationChannel:{RoleArn: roleArn, SNSTopicArn: snsTopicArn}})); startJobId = labelDetectionResponse.JobId console.log(`JobID: ${startJobId}`) return startJobId } catch (err) { console.log("Error", err); } }; const getLabelDetectionResults = async(startJobId) => { console.log("Retrieving Label Detection results") // Set max results, paginationToken and finished will be updated depending on response values var maxResults = 10 var paginationToken = '' var finished = false // Begin retrieving label detection results while (finished == false){ var response = await rekClient.send(new GetLabelDetectionCommand({JobId: startJobId, MaxResults: maxResults, NextToken: paginationToken, SortBy:'TIMESTAMP'})) // Log metadata console.log(`Codec: ${response.VideoMetadata.Codec}`) console.log(`Duration: ${response.VideoMetadata.DurationMillis}`) console.log(`Format: ${response.VideoMetadata.Format}`) console.log(`Frame Rate: ${response.VideoMetadata.FrameRate}`) console.log() // For every detected label, log label, confidence, bounding box, and timestamp response.Labels.forEach(labelDetection => { var label = labelDetection.Label console.log(`Timestamp: ${labelDetection.Timestamp}`) console.log(`Label: ${label.Name}`) console.log(`Confidence: ${label.Confidence}`) console.log("Instances:") label.Instances.forEach(instance =>{ console.log(`Confidence: ${instance.Confidence}`) console.log("Bounding Box:") console.log(`Top: ${instance.Confidence}`) console.log(`Left: ${instance.Confidence}`) console.log(`Width: ${instance.Confidence}`) console.log(`Height: ${instance.Confidence}`) console.log() }) console.log() // Log parent if found console.log(" Parents:") label.Parents.forEach(parent =>{ console.log(` ${parent.Name}`) }) console.log() // Searh for pagination token, if found, set variable to next token if (String(response).includes("NextToken")){ paginationToken = response.NextToken }else{ finished = true } }) } } // 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 runLabelDetectionAndGetResults = async () => { try { const sqsAndTopic = await createTopicandQueue(); const startLabelDetectionRes = await startLabelDetection(roleArn, sqsAndTopic[1]); const getSQSMessageStatus = await getSQSMessageSuccess(sqsAndTopic[0], startLabelDetectionRes) console.log(getSQSMessageSuccess) if (getSQSMessageSuccess){ console.log("Retrieving results:") const results = await getLabelDetectionResults(startLabelDetectionRes) } 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); } }; runLabelDetectionAndGetResults() -
- Java V2
-
このコードは、 AWSドキュメント SDK サンプル GitHub リポジトリから取得されます。詳しい事例は [こちら
] です。 import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.JsonMappingException; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; 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.StartLabelDetectionResponse; import software.amazon.awssdk.services.rekognition.model.NotificationChannel; import software.amazon.awssdk.services.rekognition.model.S3Object; import software.amazon.awssdk.services.rekognition.model.Video; import software.amazon.awssdk.services.rekognition.model.StartLabelDetectionRequest; import software.amazon.awssdk.services.rekognition.model.GetLabelDetectionRequest; import software.amazon.awssdk.services.rekognition.model.GetLabelDetectionResponse; import software.amazon.awssdk.services.rekognition.model.RekognitionException; import software.amazon.awssdk.services.rekognition.model.LabelDetectionSortBy; import software.amazon.awssdk.services.rekognition.model.VideoMetadata; import software.amazon.awssdk.services.rekognition.model.LabelDetection; import software.amazon.awssdk.services.rekognition.model.Label; import software.amazon.awssdk.services.rekognition.model.Instance; import software.amazon.awssdk.services.rekognition.model.Parent; import software.amazon.awssdk.services.sqs.SqsClient; import software.amazon.awssdk.services.sqs.model.Message; import software.amazon.awssdk.services.sqs.model.ReceiveMessageRequest; import software.amazon.awssdk.services.sqs.model.DeleteMessageRequest; import java.util.List; //snippet-end:[rekognition.java2.recognize_video_detect.import] /** * Before running this Java V2 code example, set up your development environment, including your credentials. * * For more information, see the following documentation topic: * * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html */ public class VideoDetect { private static String startJobId =""; public static void main(String[] args) { final String usage = "\n" + "Usage: " + " <bucket> <video> <queueUrl> <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 the video (for example, people.mp4). \n\n" + " queueUrl- The URL of a SQS queue. \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 != 5) { System.out.println(usage); System.exit(1); } String bucket = args[0]; String video = args[1]; String queueUrl = args[2]; String topicArn = args[3]; String roleArn = args[4]; Region region = Region.US_WEST_2; RekognitionClient rekClient = RekognitionClient.builder() .region(region) .credentialsProvider(ProfileCredentialsProvider.create("profile-name")) .build(); SqsClient sqs = SqsClient.builder() .region(Region.US_WEST_2) .credentialsProvider(ProfileCredentialsProvider.create("profile-name")) .build(); NotificationChannel channel = NotificationChannel.builder() .snsTopicArn(topicArn) .roleArn(roleArn) .build(); startLabels(rekClient, channel, bucket, video); getLabelJob(rekClient, sqs, queueUrl); System.out.println("This example is done!"); sqs.close(); rekClient.close(); } // snippet-start:[rekognition.java2.recognize_video_detect.main] public static void startLabels(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(); StartLabelDetectionRequest labelDetectionRequest = StartLabelDetectionRequest.builder() .jobTag("DetectingLabels") .notificationChannel(channel) .video(vidOb) .minConfidence(50F) .build(); StartLabelDetectionResponse labelDetectionResponse = rekClient.startLabelDetection(labelDetectionRequest); startJobId = labelDetectionResponse.jobId(); boolean ans = true; String status = ""; int yy = 0; while (ans) { GetLabelDetectionRequest detectionRequest = GetLabelDetectionRequest.builder() .jobId(startJobId) .maxResults(10) .build(); GetLabelDetectionResponse result = rekClient.getLabelDetection(detectionRequest); status = result.jobStatusAsString(); if (status.compareTo("SUCCEEDED") == 0) ans = false; else System.out.println(yy +" status is: "+status); Thread.sleep(1000); yy++; } System.out.println(startJobId +" status is: "+status); } catch(RekognitionException | InterruptedException e) { e.getMessage(); System.exit(1); } } public static void getLabelJob(RekognitionClient rekClient, SqsClient sqs, String queueUrl) { List<Message> messages; ReceiveMessageRequest messageRequest = ReceiveMessageRequest.builder() .queueUrl(queueUrl) .build(); try { messages = sqs.receiveMessage(messageRequest).messages(); if (!messages.isEmpty()) { for (Message message: messages) { String notification = message.body(); // Get the status and job id from the notification ObjectMapper mapper = new ObjectMapper(); JsonNode jsonMessageTree = mapper.readTree(notification); JsonNode messageBodyText = jsonMessageTree.get("Message"); ObjectMapper operationResultMapper = new ObjectMapper(); JsonNode jsonResultTree = operationResultMapper.readTree(messageBodyText.textValue()); JsonNode operationJobId = jsonResultTree.get("JobId"); JsonNode operationStatus = jsonResultTree.get("Status"); System.out.println("Job found in JSON is " + operationJobId); DeleteMessageRequest deleteMessageRequest = DeleteMessageRequest.builder() .queueUrl(queueUrl) .build(); String jobId = operationJobId.textValue(); if (startJobId.compareTo(jobId)==0) { System.out.println("Job id: " + operationJobId ); System.out.println("Status : " + operationStatus.toString()); if (operationStatus.asText().equals("SUCCEEDED")) GetResultsLabels(rekClient); else System.out.println("Video analysis failed"); sqs.deleteMessage(deleteMessageRequest); } else{ System.out.println("Job received was not job " + startJobId); sqs.deleteMessage(deleteMessageRequest); } } } } catch(RekognitionException e) { e.getMessage(); System.exit(1); } catch (JsonMappingException e) { e.printStackTrace(); } catch (JsonProcessingException e) { e.printStackTrace(); } } // Gets the job results by calling GetLabelDetection private static void GetResultsLabels(RekognitionClient rekClient) { int maxResults=10; String paginationToken=null; GetLabelDetectionResponse labelDetectionResult=null; try { do { if (labelDetectionResult !=null) paginationToken = labelDetectionResult.nextToken(); GetLabelDetectionRequest labelDetectionRequest= GetLabelDetectionRequest.builder() .jobId(startJobId) .sortBy(LabelDetectionSortBy.TIMESTAMP) .maxResults(maxResults) .nextToken(paginationToken) .build(); labelDetectionResult = rekClient.getLabelDetection(labelDetectionRequest); VideoMetadata videoMetaData=labelDetectionResult.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()); List<LabelDetection> detectedLabels= labelDetectionResult.labels(); for (LabelDetection detectedLabel: detectedLabels) { long seconds=detectedLabel.timestamp(); Label label=detectedLabel.label(); System.out.println("Millisecond: " + seconds + " "); System.out.println(" Label:" + label.name()); System.out.println(" Confidence:" + detectedLabel.label().confidence().toString()); List<Instance> instances = label.instances(); System.out.println(" Instances of " + label.name()); if (instances.isEmpty()) { System.out.println(" " + "None"); } else { for (Instance instance : instances) { System.out.println(" Confidence: " + instance.confidence().toString()); System.out.println(" Bounding box: " + instance.boundingBox().toString()); } } System.out.println(" Parent labels for " + label.name() + ":"); List<Parent> parents = label.parents(); if (parents.isEmpty()) { System.out.println(" None"); } else { for (Parent parent : parents) { System.out.println(" " + parent.name()); } } System.out.println(); } } while (labelDetectionResult !=null && labelDetectionResult.nextToken() != null); } catch(RekognitionException e) { e.getMessage(); System.exit(1); } } // snippet-end:[rekognition.java2.recognize_video_detect.main] }
-
コードをビルドして実行します。オペレーションの完了までに時間がかかる場合があります。完了すると、ビデオ内で検出されたラベルのリストが表示されます。詳細については、「ビデオ内のラベルの検出」を参照してください。
Amazon Rekognition Video の設定
ビデオの分析 (AWS CLI)