# Generate videos from text prompts using Amazon Bedrock and Nova-Reel
Generate videos from text prompts using Amazon Bedrock

The following code example shows how to a Spring Boot app that generates videos from text prompts using Amazon Bedrock and the Nova-Reel model.

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#### [ Java ]

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/bedrock-runtime#code-examples). 
Generate videos from text prompts using Amazon Bedrock and Nova-Reel.  

```
import org.springframework.stereotype.Service;
import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
import software.amazon.awssdk.core.document.Document;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.bedrockruntime.BedrockRuntimeAsyncClient;
import software.amazon.awssdk.services.bedrockruntime.model.*;

import java.util.concurrent.CompletableFuture;

@Service
public class VideoGenerationService {

    public GenerateVideoResponse generateVideo(String prompt) {

        // add S3 bucket you want to store your generated videos
        String s3Bucket = "s3://mygeneratedvidoenovatest";


        //Create json request as an instance of Document class
        Document novaRequest = prepareDocument(prompt);

        // Create request
        StartAsyncInvokeRequest request = StartAsyncInvokeRequest.builder()
                .modelId("amazon.nova-reel-v1:0")
                .modelInput(novaRequest)
                .outputDataConfig(AsyncInvokeOutputDataConfig.builder()
                        .s3OutputDataConfig(AsyncInvokeS3OutputDataConfig.builder().s3Uri(s3Bucket).build())
                        .build())
                .build();

        try (BedrockRuntimeAsyncClient bedrockClient = getBedrockRuntimeAsyncClient()) {
            CompletableFuture<StartAsyncInvokeResponse> startAsyncInvokeResponseCompletableFuture = bedrockClient.startAsyncInvoke(request);

            //blocking operation to wait for the AWS API response
            StartAsyncInvokeResponse startAsyncInvokeResponse = startAsyncInvokeResponseCompletableFuture.get();
            System.out.println("invocation ARN: " + startAsyncInvokeResponse.invocationArn());

            GenerateVideoResponse response = new GenerateVideoResponse();
            response.setStatus("inProgress");
            response.setExecutionArn(startAsyncInvokeResponse.invocationArn());

            return response;
        } catch (Exception e) {
            System.out.println(e);
            throw new RuntimeException(e);
        }

    }

    public GenerateVideoResponse checkGenerationStatus(String invocationArn) {
        GenerateVideoResponse response = new GenerateVideoResponse();

        try (BedrockRuntimeAsyncClient bedrockClient = getBedrockRuntimeAsyncClient()) {
            //creating async request to fetch status by invocation Arn
            GetAsyncInvokeRequest asyncRequest = GetAsyncInvokeRequest.builder().invocationArn(invocationArn).build();

            CompletableFuture<GetAsyncInvokeResponse> asyncInvoke = bedrockClient.getAsyncInvoke(asyncRequest);

            //blocking operation to wait for the AWS API response
            GetAsyncInvokeResponse asyncInvokeResponse = asyncInvoke.get();
            System.out.println("Invocation status =" + asyncInvokeResponse.statusAsString());

            response.setExecutionArn(invocationArn);
            response.setStatus(asyncInvokeResponse.statusAsString());
            return response;
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }

    }

    private static BedrockRuntimeAsyncClient getBedrockRuntimeAsyncClient() {
        BedrockRuntimeAsyncClient bedrockClient = BedrockRuntimeAsyncClient.builder()
                .region(Region.US_EAST_1)
                .credentialsProvider(ProfileCredentialsProvider.create())
                .build();
        return bedrockClient;
    }

    private static Document prepareDocument(String prompt) {
        Document textToVideoParams = Document.mapBuilder()
                .putString("text", prompt)
                .build();

        Document videoGenerationConfig = Document.mapBuilder()
                .putNumber("durationSeconds", 6)
                .putNumber("fps", 24)
                .putString("dimension", "1280x720")
                .build();

        Document novaRequest = Document.mapBuilder()
                .putString("taskType", "TEXT_VIDEO")
                .putDocument("textToVideoParams", textToVideoParams)
                .putDocument("videoGenerationConfig", videoGenerationConfig)
                .build();
        return novaRequest;
    }
}
```
+ For API details, see the following topics in *AWS SDK for Java 2.x API Reference*.
  + [GetAsyncInvoke](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-runtime-2023-09-30/GetAsyncInvoke)
  + [StartAsyncInvoke](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-runtime-2023-09-30/StartAsyncInvoke)

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For a complete list of AWS SDK developer guides and code examples, see [Using Amazon Bedrock with an AWS SDK](sdk-general-information-section.md). This topic also includes information about getting started and details about previous SDK versions.