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jdomingrJuan Dominguez
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Juan Dominguez
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feat(genai): add video generation samples (#10186)
* feat(genai): add video generation samples * fix: update and fix tests --------- Co-authored-by: Juan Dominguez <[email protected]>
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‎genai/snippets/src/main/java/genai/videogeneration/VideoGenWithImg.java‎

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/*
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* Copyright 2025 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package genai.videogeneration;
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// [START googlegenaisdk_videogen_with_img]
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import com.google.genai.Client;
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import com.google.genai.types.GenerateVideosConfig;
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import com.google.genai.types.GenerateVideosOperation;
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import com.google.genai.types.GenerateVideosResponse;
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import com.google.genai.types.GeneratedVideo;
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import com.google.genai.types.GetOperationConfig;
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import com.google.genai.types.Image;
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import com.google.genai.types.Video;
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import java.util.concurrent.TimeUnit;
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public class VideoGenWithImg {
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public static void main(String[] args) throws InterruptedException {
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// TODO(developer): Replace these variables before running the sample.
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String modelId = "veo-3.0-generate-preview";
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String outputGcsUri = "gs://your-bucket/your-prefix";
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generateContent(modelId, outputGcsUri);
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}
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// Generates a video with an image and a text prompt.
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public static String generateContent(String modelId, String outputGcsUri)
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throws InterruptedException {
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// Client Initialization. Once created, it can be reused for multiple requests.
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try (Client client = Client.builder().location("global").vertexAI(true).build()) {
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GenerateVideosOperation operation =
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client.models.generateVideos(
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modelId,
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"Extreme close-up of a cluster of vibrant wildflowers"
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+ " swaying gently in a sun-drenched meadow.",
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Image.builder()
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.gcsUri("gs://cloud-samples-data/generative-ai/image/flowers.png")
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.mimeType("image/png")
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.build(),
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GenerateVideosConfig.builder()
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.aspectRatio("16:9")
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.outputGcsUri(outputGcsUri)
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.build());
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while (!operation.done().orElse(false)) {
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TimeUnit.SECONDS.sleep(15);
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operation =
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client.operations.getVideosOperation(operation, GetOperationConfig.builder().build());
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}
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String generatedVideoUri =
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operation
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.response()
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.flatMap(GenerateVideosResponse::generatedVideos)
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.flatMap(videos -> videos.stream().findFirst())
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.flatMap(GeneratedVideo::video)
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.flatMap(Video::uri)
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.orElseThrow(
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() ->
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new IllegalStateException(
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"Could not get the URI from the generated video"));
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System.out.println("Generated video URI: " + generatedVideoUri);
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// Example response:
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// Generated video URI: gs://your-bucket/your-prefix/generated-video-123.mp4
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return generatedVideoUri;
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}
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}
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}
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// [END googlegenaisdk_videogen_with_img]

‎genai/snippets/src/main/java/genai/videogeneration/VideoGenWithTxt.java‎

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/*
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* Copyright 2025 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package genai.videogeneration;
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// [START googlegenaisdk_videogen_with_txt]
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import com.google.genai.Client;
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import com.google.genai.types.GenerateVideosConfig;
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import com.google.genai.types.GenerateVideosOperation;
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import com.google.genai.types.GenerateVideosResponse;
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import com.google.genai.types.GenerateVideosSource;
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import com.google.genai.types.GeneratedVideo;
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import com.google.genai.types.GetOperationConfig;
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import com.google.genai.types.Video;
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import java.util.concurrent.TimeUnit;
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public class VideoGenWithTxt {
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public static void main(String[] args) throws InterruptedException {
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// TODO(developer): Replace these variables before running the sample.
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String modelId = "veo-3.0-generate-001";
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String outputGcsUri = "gs://your-bucket/your-prefix";
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generateContent(modelId, outputGcsUri);
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}
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// Generates a video with a text prompt.
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public static String generateContent(String modelId, String outputGcsUri)
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throws InterruptedException {
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// Client Initialization. Once created, it can be reused for multiple requests.
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try (Client client = Client.builder().location("global").vertexAI(true).build()) {
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GenerateVideosOperation operation =
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client.models.generateVideos(
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modelId,
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GenerateVideosSource.builder().prompt("a cat reading a book").build(),
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GenerateVideosConfig.builder()
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.aspectRatio("16:9")
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.outputGcsUri(outputGcsUri)
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.build());
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while (!operation.done().orElse(false)) {
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TimeUnit.SECONDS.sleep(15);
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operation =
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client.operations.getVideosOperation(operation, GetOperationConfig.builder().build());
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}
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String generatedVideoUri =
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operation
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.response()
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.flatMap(GenerateVideosResponse::generatedVideos)
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.flatMap(videos -> videos.stream().findFirst())
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.flatMap(GeneratedVideo::video)
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.flatMap(Video::uri)
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.orElseThrow(
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() ->
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new IllegalStateException(
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"Could not get the URI from the generated video"));
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System.out.println("Generated video URI: " + generatedVideoUri);
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// Example response:
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// Generated video URI: gs://your-bucket/your-prefix/generated-video-123.mp4
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return generatedVideoUri;
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}
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}
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}
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// [END googlegenaisdk_videogen_with_txt]

‎genai/snippets/src/test/java/genai/videogeneration/VideoGenerationIT.java‎

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/*
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* Copyright 2025 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package genai.videogeneration;
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import static com.google.common.truth.Truth.assertThat;
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import static com.google.common.truth.Truth.assertWithMessage;
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import com.google.api.gax.paging.Page;
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import com.google.cloud.storage.Blob;
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import com.google.cloud.storage.Storage;
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import com.google.cloud.storage.StorageOptions;
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import java.io.ByteArrayOutputStream;
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import java.io.PrintStream;
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import java.util.UUID;
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import org.junit.After;
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import org.junit.AfterClass;
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import org.junit.Before;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.JUnit4;
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@RunWith(JUnit4.class)
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public class VideoGenerationIT {
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private static final String VIDEO_GEN_MODEL = "veo-3.0-generate-001";
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private static final String VIDEO_GEN_PREVIEW_MODEL = "veo-3.0-generate-preview";
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private static final String BUCKET_NAME = "java-docs-samples-testing";
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private static final String PREFIX = "genai-video-generation-" + UUID.randomUUID();
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private static final String OUTPUT_GCS_URI = String.format("gs://%s/%s", BUCKET_NAME, PREFIX);
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private ByteArrayOutputStream bout;
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private PrintStream out;
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// Check if the required environment variables are set.
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public static void requireEnvVar(String envVarName) {
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assertWithMessage(String.format("Missing environment variable '%s' ", envVarName))
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.that(System.getenv(envVarName))
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.isNotEmpty();
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}
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@BeforeClass
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public static void checkRequirements() {
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requireEnvVar("GOOGLE_CLOUD_PROJECT");
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}
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@AfterClass
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public static void cleanup() {
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Storage storage = StorageOptions.getDefaultInstance().getService();
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Page<Blob> blobs = storage.list(BUCKET_NAME, Storage.BlobListOption.prefix(PREFIX));
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for (Blob blob : blobs.iterateAll()) {
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storage.delete(blob.getBlobId());
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}
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}
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@Before
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public void setUp() {
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bout = new ByteArrayOutputStream();
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out = new PrintStream(bout);
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System.setOut(out);
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}
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@After
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public void tearDown() {
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System.setOut(null);
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bout.reset();
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}
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@Test
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public void testVideoGenWithImg() throws InterruptedException {
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String response = VideoGenWithImg.generateContent(VIDEO_GEN_PREVIEW_MODEL, OUTPUT_GCS_URI);
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assertThat(response).isNotEmpty();
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assertThat(bout.toString()).contains(OUTPUT_GCS_URI);
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}
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@Test
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public void testVideoGenWithTxt() throws InterruptedException {
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String response = VideoGenWithTxt.generateContent(VIDEO_GEN_MODEL, OUTPUT_GCS_URI);
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assertThat(response).isNotEmpty();
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assertThat(bout.toString()).contains(OUTPUT_GCS_URI);
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}
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}

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