分析影片中的標籤

Video Intelligence API 可使用 LABEL_DETECTION 功能，識別影片片段中顯示的實體。這項功能可辨識物件、地點、活動、動物物種、產品等。

分析可分為以下幾類：

• 影格層級：
  系統會識別每個影格中的實體並加上標籤 (每秒取樣一個影格)。
• 鏡頭層級：
  系統會自動偵測每個片段 (或影片) 中的鏡頭。接著，系統會識別每個鏡頭中的實體並加上標籤。
• 片段層級：
  您可以指定影片中要分析的片段，方法是設定註解的開始和結束時間偏移 (請參閱 VideoSegment)。然後在每個區段中識別並標記實體。如果未指定任何片段，系統會將整部影片視為一個片段。

注意： 如需範例，請參閱標籤偵測教學課程

為本機檔案加註

下列範例示範如何對本機檔案的影片執行標籤分析。

想要更深入瞭解？請參閱詳細的 Python 教學課程。

REST

傳送處理要求

以下說明如何將 POST 要求傳送至 videos:annotate 方法。您可以將 LabelDetectionMode 設定為鏡頭層級和/或影格層級的註解。建議使用 SHOT_AND_FRAME_MODE。其中使用的存取憑證，屬於透過 Google Cloud CLI 建立的專案服務帳戶。如需安裝 Google Cloud CLI、使用服務帳戶建立專案，以及取得存取權杖的操作說明，請參閱 Video Intelligence 快速入門導覽課程。

使用任何要求資料之前，請先替換以下項目：

• BASE64_ENCODED_CONTENT：以 Base64 編碼資料形式提供的影片。請參閱將資料轉換為 base64 的操作說明。
• PROJECT_NUMBER： Google Cloud 專案的數字 ID

HTTP 方法和網址：

POST https://videointelligence.googleapis.com/v1/videos:annotate

JSON 要求主體：

{
  "inputContent": "BASE64_ENCODED_CONTENT",
  "features": ["LABEL_DETECTION"],
}

請展開以下其中一個選項，以傳送要求：

curl (Linux、macOS 或 Cloud Shell)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI，或已使用 Cloud Shell 自動登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

將要求主體儲存在名為 request.json 的檔案中，然後執行下列指令：

curl -X POST \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "x-goog-user-project: PROJECT_NUMBER" \
     -H "Content-Type: application/json; charset=utf-8" \
     -d @request.json \
     "https://videointelligence.googleapis.com/v1/videos:annotate"

PowerShell (Windows)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

將要求主體儲存在名為 request.json 的檔案中，然後執行下列指令：

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_NUMBER" }

Invoke-WebRequest `
    -Method POST `
    -Headers $headers `
    -ContentType: "application/json; charset=utf-8" `
    -InFile request.json `
    -Uri "https://videointelligence.googleapis.com/v1/videos:annotate" | Select-Object -Expand Content

您應該會收到如下的 JSON 回覆：

{
  "name": "projects/PROJECT_NUMBER/locations/LOCATION_ID/operations/OPERATION_ID"
}

如果要求成功，Video Intelligence 會傳回作業名稱。

取得結果

如要取得要求結果，您必須將 GET 要求傳送至 projects.locations.operations 資源。以下說明如何傳送這類要求。

使用任何要求資料之前，請先替換以下項目：

• OPERATION_NAME：Video Intelligence API 傳回的作業名稱。作業名稱的格式為 projects/PROJECT_NUMBER/locations/LOCATION_ID/operations/OPERATION_ID
• PROJECT_NUMBER： Google Cloud 專案的數字 ID

HTTP 方法和網址：

GET https://videointelligence.googleapis.com/v1/OPERATION_NAME

請展開以下其中一個選項，以傳送要求：

curl (Linux、macOS 或 Cloud Shell)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI，或已使用 Cloud Shell 自動登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

執行下列指令：

curl -X GET \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "x-goog-user-project: PROJECT_NUMBER" \
     "https://videointelligence.googleapis.com/v1/OPERATION_NAME"

PowerShell (Windows)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

執行下列指令：

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_NUMBER" }

Invoke-WebRequest `
    -Method GET `
    -Headers $headers `
    -Uri "https://videointelligence.googleapis.com/v1/OPERATION_NAME" | Select-Object -Expand Content

您應該會收到如下的 JSON 回覆：

回應

{
  "name": "projects/PROJECT_NUMBER/locations/LOCATION_ID/operations/OPERATION_ID",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.videointelligence.v1.AnnotateVideoProgress",
    "annotationProgress": [
      {
        "progressPercent": 100,
        "startTime": "2019-03-12T19:36:09.110351Z",
        "updateTime": "2019-03-12T19:36:17.519069Z"
      }
    ]
  },
  "done": true,
  "response": {
    "@type": "type.googleapis.com/google.cloud.videointelligence.v1.AnnotateVideoResponse",
    "annotationResults": [
      {
        "segmentLabelAnnotations": [
          {
            "entity": {
              "entityId": "/m/01prls",
              "description": "land vehicle",
              "languageCode": "en-US"
            },
            "categoryEntities": [
              {
                "entityId": "/m/07yv9",
                "description": "vehicle",
                "languageCode": "en-US"
              }
            ],
            "segments": [
              {
                "segment": {
                  "startTimeOffset": "0s",
                  "endTimeOffset": "38.757872s"
                },
                "confidence": 0.6614419
              }
            ]
          },
          {
            "entity": {
              "entityId": "/m/039jbq",
              "description": "urban area",
              "languageCode": "en-US"
            },
            "categoryEntities": [
              {
                "entityId": "/m/01n32",
                "description": "city",
                "languageCode": "en-US"
              }
            ],
            "segments": [
              {
                "segment": {
                  "startTimeOffset": "0s",
                  "endTimeOffset": "38.757872s"
                },
                "confidence": 0.92337775
              }
            ]
          },
          ...

Go

func label(w io.Writer, file string) error {
	ctx := context.Background()
	client, err := video.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("video.NewClient: %w", err)
	}
	defer client.Close()

	fileBytes, err := os.ReadFile(file)
	if err != nil {
		return err
	}

	op, err := client.AnnotateVideo(ctx, &videopb.AnnotateVideoRequest{
		Features: []videopb.Feature{
			videopb.Feature_LABEL_DETECTION,
		},
		InputContent: fileBytes,
	})
	if err != nil {
		return fmt.Errorf("AnnotateVideo: %w", err)
	}

	resp, err := op.Wait(ctx)
	if err != nil {
		return fmt.Errorf("Wait: %w", err)
	}

	printLabels := func(labels []*videopb.LabelAnnotation) {
		for _, label := range labels {
			fmt.Fprintf(w, "\tDescription: %s\n", label.Entity.Description)
			for _, category := range label.CategoryEntities {
				fmt.Fprintf(w, "\t\tCategory: %s\n", category.Description)
			}
			for _, segment := range label.Segments {
				start, _ := ptypes.Duration(segment.Segment.StartTimeOffset)
				end, _ := ptypes.Duration(segment.Segment.EndTimeOffset)
				fmt.Fprintf(w, "\t\tSegment: %s to %s\n", start, end)
			}
		}
	}

	// A single video was processed. Get the first result.
	result := resp.AnnotationResults[0]

	fmt.Fprintln(w, "SegmentLabelAnnotations:")
	printLabels(result.SegmentLabelAnnotations)
	fmt.Fprintln(w, "ShotLabelAnnotations:")
	printLabels(result.ShotLabelAnnotations)
	fmt.Fprintln(w, "FrameLabelAnnotations:")
	printLabels(result.FrameLabelAnnotations)

	return nil
}

Java

// Instantiate a com.google.cloud.videointelligence.v1.VideoIntelligenceServiceClient
try (VideoIntelligenceServiceClient client = VideoIntelligenceServiceClient.create()) {
  // Read file and encode into Base64
  Path path = Paths.get(filePath);
  byte[] data = Files.readAllBytes(path);

  AnnotateVideoRequest request =
      AnnotateVideoRequest.newBuilder()
          .setInputContent(ByteString.copyFrom(data))
          .addFeatures(Feature.LABEL_DETECTION)
          .build();
  // Create an operation that will contain the response when the operation completes.
  OperationFuture<AnnotateVideoResponse, AnnotateVideoProgress> response =
      client.annotateVideoAsync(request);

  System.out.println("Waiting for operation to complete...");
  for (VideoAnnotationResults results : response.get().getAnnotationResultsList()) {
    // process video / segment level label annotations
    System.out.println("Locations: ");
    for (LabelAnnotation labelAnnotation : results.getSegmentLabelAnnotationsList()) {
      System.out.println("Video label: " + labelAnnotation.getEntity().getDescription());
      // categories
      for (Entity categoryEntity : labelAnnotation.getCategoryEntitiesList()) {
        System.out.println("Video label category: " + categoryEntity.getDescription());
      }
      // segments
      for (LabelSegment segment : labelAnnotation.getSegmentsList()) {
        double startTime =
            segment.getSegment().getStartTimeOffset().getSeconds()
                + segment.getSegment().getStartTimeOffset().getNanos() / 1e9;
        double endTime =
            segment.getSegment().getEndTimeOffset().getSeconds()
                + segment.getSegment().getEndTimeOffset().getNanos() / 1e9;
        System.out.printf("Segment location: %.3f:%.2f\n", startTime, endTime);
        System.out.println("Confidence: " + segment.getConfidence());
      }
    }

    // process shot label annotations
    for (LabelAnnotation labelAnnotation : results.getShotLabelAnnotationsList()) {
      System.out.println("Shot label: " + labelAnnotation.getEntity().getDescription());
      // categories
      for (Entity categoryEntity : labelAnnotation.getCategoryEntitiesList()) {
        System.out.println("Shot label category: " + categoryEntity.getDescription());
      }
      // segments
      for (LabelSegment segment : labelAnnotation.getSegmentsList()) {
        double startTime =
            segment.getSegment().getStartTimeOffset().getSeconds()
                + segment.getSegment().getStartTimeOffset().getNanos() / 1e9;
        double endTime =
            segment.getSegment().getEndTimeOffset().getSeconds()
                + segment.getSegment().getEndTimeOffset().getNanos() / 1e9;
        System.out.printf("Segment location: %.3f:%.2f\n", startTime, endTime);
        System.out.println("Confidence: " + segment.getConfidence());
      }
    }

    // process frame label annotations
    for (LabelAnnotation labelAnnotation : results.getFrameLabelAnnotationsList()) {
      System.out.println("Frame label: " + labelAnnotation.getEntity().getDescription());
      // categories
      for (Entity categoryEntity : labelAnnotation.getCategoryEntitiesList()) {
        System.out.println("Frame label category: " + categoryEntity.getDescription());
      }
      // segments
      for (LabelSegment segment : labelAnnotation.getSegmentsList()) {
        double startTime =
            segment.getSegment().getStartTimeOffset().getSeconds()
                + segment.getSegment().getStartTimeOffset().getNanos() / 1e9;
        double endTime =
            segment.getSegment().getEndTimeOffset().getSeconds()
                + segment.getSegment().getEndTimeOffset().getNanos() / 1e9;
        System.out.printf("Segment location: %.3f:%.2f\n", startTime, endTime);
        System.out.println("Confidence: " + segment.getConfidence());
      }
    }
  }
}

Node.js

// Imports the Google Cloud Video Intelligence library + Node's fs library
const video = require('@google-cloud/video-intelligence').v1;
const fs = require('fs');
const util = require('util');

// Creates a client
const client = new video.VideoIntelligenceServiceClient();

/**
 * TODO(developer): Uncomment the following line before running the sample.
 */
// const path = 'Local file to analyze, e.g. ./my-file.mp4';

// Reads a local video file and converts it to base64
const readFile = util.promisify(fs.readFile);
const file = await readFile(path);
const inputContent = file.toString('base64');

// Constructs request
const request = {
  inputContent: inputContent,
  features: ['LABEL_DETECTION'],
};

// Detects labels in a video
const [operation] = await client.annotateVideo(request);
console.log('Waiting for operation to complete...');
const [operationResult] = await operation.promise();
// Gets annotations for video
const annotations = operationResult.annotationResults[0];

const labels = annotations.segmentLabelAnnotations;
labels.forEach(label => {
  console.log(`Label ${label.entity.description} occurs at:`);
  label.segments.forEach(segment => {
    const time = segment.segment;
    if (time.startTimeOffset.seconds === undefined) {
      time.startTimeOffset.seconds = 0;
    }
    if (time.startTimeOffset.nanos === undefined) {
      time.startTimeOffset.nanos = 0;
    }
    if (time.endTimeOffset.seconds === undefined) {
      time.endTimeOffset.seconds = 0;
    }
    if (time.endTimeOffset.nanos === undefined) {
      time.endTimeOffset.nanos = 0;
    }
    console.log(
      `\tStart: ${time.startTimeOffset.seconds}` +
        `.${(time.startTimeOffset.nanos / 1e6).toFixed(0)}s`
    );
    console.log(
      `\tEnd: ${time.endTimeOffset.seconds}.` +
        `${(time.endTimeOffset.nanos / 1e6).toFixed(0)}s`
    );
    console.log(`\tConfidence: ${segment.confidence}`);
  });
});

Python

如要進一步瞭解如何安裝及使用 Python 專用的 Video Intelligence API 用戶端程式庫，請參閱 Video Intelligence API 用戶端程式庫。

"""Detect labels given a file path."""
video_client = videointelligence.VideoIntelligenceServiceClient()
features = [videointelligence.Feature.LABEL_DETECTION]

with io.open(path, "rb") as movie:
    input_content = movie.read()

operation = video_client.annotate_video(
    request={"features": features, "input_content": input_content}
)
print("\nProcessing video for label annotations:")

result = operation.result(timeout=90)
print("\nFinished processing.")

# Process video/segment level label annotations
segment_labels = result.annotation_results[0].segment_label_annotations
for i, segment_label in enumerate(segment_labels):
    print("Video label description: {}".format(segment_label.entity.description))
    for category_entity in segment_label.category_entities:
        print(
            "\tLabel category description: {}".format(category_entity.description)
        )

    for i, segment in enumerate(segment_label.segments):
        start_time = (
            segment.segment.start_time_offset.seconds
            + segment.segment.start_time_offset.microseconds / 1e6
        )
        end_time = (
            segment.segment.end_time_offset.seconds
            + segment.segment.end_time_offset.microseconds / 1e6
        )
        positions = "{}s to {}s".format(start_time, end_time)
        confidence = segment.confidence
        print("\tSegment {}: {}".format(i, positions))
        print("\tConfidence: {}".format(confidence))
    print("\n")

# Process shot level label annotations
shot_labels = result.annotation_results[0].shot_label_annotations
for i, shot_label in enumerate(shot_labels):
    print("Shot label description: {}".format(shot_label.entity.description))
    for category_entity in shot_label.category_entities:
        print(
            "\tLabel category description: {}".format(category_entity.description)
        )

    for i, shot in enumerate(shot_label.segments):
        start_time = (
            shot.segment.start_time_offset.seconds
            + shot.segment.start_time_offset.microseconds / 1e6
        )
        end_time = (
            shot.segment.end_time_offset.seconds
            + shot.segment.end_time_offset.microseconds / 1e6
        )
        positions = "{}s to {}s".format(start_time, end_time)
        confidence = shot.confidence
        print("\tSegment {}: {}".format(i, positions))
        print("\tConfidence: {}".format(confidence))
    print("\n")

# Process frame level label annotations
frame_labels = result.annotation_results[0].frame_label_annotations
for i, frame_label in enumerate(frame_labels):
    print("Frame label description: {}".format(frame_label.entity.description))
    for category_entity in frame_label.category_entities:
        print(
            "\tLabel category description: {}".format(category_entity.description)
        )

    # Each frame_label_annotation has many frames,
    # here we print information only about the first frame.
    frame = frame_label.frames[0]
    time_offset = frame.time_offset.seconds + frame.time_offset.microseconds / 1e6
    print("\tFirst frame time offset: {}s".format(time_offset))
    print("\tFirst frame confidence: {}".format(frame.confidence))
    print("\n")

其他語言

C#：請按照用戶端程式庫頁面上的 C# 設定操作說明完成相關步驟，然後參閱「.NET 適用的 Video Intelligence 參考文件」。

PHP：請按照用戶端程式庫頁面上的 PHP 設定操作說明完成相關步驟，然後參閱「PHP 適用的 Video Intelligence 參考文件」。

Ruby：請按照用戶端程式庫頁面上的 Ruby 設定操作說明完成相關步驟，然後參閱「Ruby 適用的 Video Intelligence 參考文件」。

為 Cloud Storage 中的檔案加註

以下範例示範如何對位於 Cloud Storage 的檔案中的影片執行標籤分析。

REST

如要進一步瞭解如何安裝及使用 Python 適用的 Video Intelligence API 用戶端程式庫，請參閱 Video Intelligence API 用戶端程式庫。

傳送處理要求

以下說明如何將 POST 要求傳送至 annotate 方法。其中使用的存取憑證，屬於透過 Google Cloud CLI 建立的專案服務帳戶。如需安裝 Google Cloud CLI、使用服務帳戶建立專案，以及取得存取權杖的操作說明，請參閱 Video Intelligence 快速入門導覽課程。

使用任何要求資料之前，請先替換以下項目：

• INPUT_URI：包含要註解檔案的 Cloud Storage bucket，包括檔案名稱。開頭必須為 gs://。
• PROJECT_NUMBER： Google Cloud 專案的數字 ID

HTTP 方法和網址：

POST https://videointelligence.googleapis.com/v1/videos:annotate

JSON 要求主體：

{
  "inputUri": "INPUT_URI",
  "features": ["LABEL_DETECTION"],
}

請展開以下其中一個選項，以傳送要求：

curl (Linux、macOS 或 Cloud Shell)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI，或已使用 Cloud Shell 自動登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

將要求主體儲存在名為 request.json 的檔案中，然後執行下列指令：

curl -X POST \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "x-goog-user-project: PROJECT_NUMBER" \
     -H "Content-Type: application/json; charset=utf-8" \
     -d @request.json \
     "https://videointelligence.googleapis.com/v1/videos:annotate"

PowerShell (Windows)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

將要求主體儲存在名為 request.json 的檔案中，然後執行下列指令：

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_NUMBER" }

Invoke-WebRequest `
    -Method POST `
    -Headers $headers `
    -ContentType: "application/json; charset=utf-8" `
    -InFile request.json `
    -Uri "https://videointelligence.googleapis.com/v1/videos:annotate" | Select-Object -Expand Content

您應該會收到如下的 JSON 回覆：

{
  "name": "projects/PROJECT_NUMBER/locations/LOCATION_ID/operations/OPERATION_ID"
}

如果要求成功，Video Intelligence 會傳回作業名稱。

取得結果

如要取得要求結果，您必須將 GET 要求傳送至 projects.locations.operations 資源。以下說明如何傳送這類要求。

使用任何要求資料之前，請先替換以下項目：

• OPERATION_NAME：Video Intelligence API 傳回的作業名稱。作業名稱的格式為 projects/PROJECT_NUMBER/locations/LOCATION_ID/operations/OPERATION_ID
• PROJECT_NUMBER： Google Cloud 專案的數字 ID

HTTP 方法和網址：

GET https://videointelligence.googleapis.com/v1/OPERATION_NAME

請展開以下其中一個選項，以傳送要求：

curl (Linux、macOS 或 Cloud Shell)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI，或已使用 Cloud Shell 自動登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

執行下列指令：

curl -X GET \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "x-goog-user-project: PROJECT_NUMBER" \
     "https://videointelligence.googleapis.com/v1/OPERATION_NAME"

PowerShell (Windows)

注意：下列指令假設您已執行 gcloud init 或 gcloud auth login，透過使用者帳戶登入 gcloud CLI。您可以執行 gcloud auth list，查看目前使用的帳戶。

執行下列指令：

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_NUMBER" }

Invoke-WebRequest `
    -Method GET `
    -Headers $headers `
    -Uri "https://videointelligence.googleapis.com/v1/OPERATION_NAME" | Select-Object -Expand Content

您應該會收到如下的 JSON 回覆：

回應

{
  "name": "projects/PROJECT_NUMBER/locations/LOCATION_ID/operations/OPERATION_ID",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.videointelligence.v1.AnnotateVideoProgress",
    "annotationProgress": [
      {
        "inputUri": "INPUT_URI",
        "progressPercent": 100,
        "startTime": "2019-11-13T19:25:56.206335Z",
        "updateTime": "2019-11-13T19:26:16.215615Z"
      }
    ]
  },
  "done": true,
  "response": {
    "@type": "type.googleapis.com/google.cloud.videointelligence.v1.AnnotateVideoResponse",
    "annotationResults": [
      {
        "inputUri": "INPUT_URI",
        "segmentLabelAnnotations": [
          {
            "entity": {
              "entityId": "/m/01vkl",
              "description": "circle",
              "languageCode": "en-US"
            },
            "categoryEntities": [
              {
                "entityId": "/m/016nqd",
                "description": "shape",
                "languageCode": "en-US"
              }
            ],
            "segments": [
              {
                "segment": {
                  "startTimeOffset": "0s",
                  "endTimeOffset": "16.416666s"
                },
                "confidence": 0.36535457
              }
            ]
          },
          ...
        ]
     }
    ]
  }
}

下載註解結果

將註解從來源複製到目標值區：(請參閱「複製檔案和物件」)

gcloud storage cp gcs_uri gs://my-bucket

注意：如果輸出 GCS URI 是由使用者提供，註解就會儲存在該 GCS URI 中。

Go

func labelURI(w io.Writer, file string) error {
	ctx := context.Background()
	client, err := video.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("video.NewClient: %w", err)
	}
	defer client.Close()

	op, err := client.AnnotateVideo(ctx, &videopb.AnnotateVideoRequest{
		Features: []videopb.Feature{
			videopb.Feature_LABEL_DETECTION,
		},
		InputUri: file,
	})
	if err != nil {
		return fmt.Errorf("AnnotateVideo: %w", err)
	}

	resp, err := op.Wait(ctx)
	if err != nil {
		return fmt.Errorf("Wait: %w", err)
	}

	printLabels := func(labels []*videopb.LabelAnnotation) {
		for _, label := range labels {
			fmt.Fprintf(w, "\tDescription: %s\n", label.Entity.Description)
			for _, category := range label.CategoryEntities {
				fmt.Fprintf(w, "\t\tCategory: %s\n", category.Description)
			}
			for _, segment := range label.Segments {
				start, _ := ptypes.Duration(segment.Segment.StartTimeOffset)
				end, _ := ptypes.Duration(segment.Segment.EndTimeOffset)
				fmt.Fprintf(w, "\t\tSegment: %s to %s\n", start, end)
			}
		}
	}

	// A single video was processed. Get the first result.
	result := resp.AnnotationResults[0]

	fmt.Fprintln(w, "SegmentLabelAnnotations:")
	printLabels(result.SegmentLabelAnnotations)
	fmt.Fprintln(w, "ShotLabelAnnotations:")
	printLabels(result.ShotLabelAnnotations)
	fmt.Fprintln(w, "FrameLabelAnnotations:")
	printLabels(result.FrameLabelAnnotations)

	return nil
}

Java

// Instantiate a com.google.cloud.videointelligence.v1.VideoIntelligenceServiceClient
try (VideoIntelligenceServiceClient client = VideoIntelligenceServiceClient.create()) {
  // Provide path to file hosted on GCS as "gs://bucket-name/..."
  AnnotateVideoRequest request =
      AnnotateVideoRequest.newBuilder()
          .setInputUri(gcsUri)
          .addFeatures(Feature.LABEL_DETECTION)
          .build();
  // Create an operation that will contain the response when the operation completes.
  OperationFuture<AnnotateVideoResponse, AnnotateVideoProgress> response =
      client.annotateVideoAsync(request);

  System.out.println("Waiting for operation to complete...");
  for (VideoAnnotationResults results : response.get().getAnnotationResultsList()) {
    // process video / segment level label annotations
    System.out.println("Locations: ");
    for (LabelAnnotation labelAnnotation : results.getSegmentLabelAnnotationsList()) {
      System.out.println("Video label: " + labelAnnotation.getEntity().getDescription());
      // categories
      for (Entity categoryEntity : labelAnnotation.getCategoryEntitiesList()) {
        System.out.println("Video label category: " + categoryEntity.getDescription());
      }
      // segments
      for (LabelSegment segment : labelAnnotation.getSegmentsList()) {
        double startTime =
            segment.getSegment().getStartTimeOffset().getSeconds()
                + segment.getSegment().getStartTimeOffset().getNanos() / 1e9;
        double endTime =
            segment.getSegment().getEndTimeOffset().getSeconds()
                + segment.getSegment().getEndTimeOffset().getNanos() / 1e9;
        System.out.printf("Segment location: %.3f:%.3f\n", startTime, endTime);
        System.out.println("Confidence: " + segment.getConfidence());
      }
    }

    // process shot label annotations
    for (LabelAnnotation labelAnnotation : results.getShotLabelAnnotationsList()) {
      System.out.println("Shot label: " + labelAnnotation.getEntity().getDescription());
      // categories
      for (Entity categoryEntity : labelAnnotation.getCategoryEntitiesList()) {
        System.out.println("Shot label category: " + categoryEntity.getDescription());
      }
      // segments
      for (LabelSegment segment : labelAnnotation.getSegmentsList()) {
        double startTime =
            segment.getSegment().getStartTimeOffset().getSeconds()
                + segment.getSegment().getStartTimeOffset().getNanos() / 1e9;
        double endTime =
            segment.getSegment().getEndTimeOffset().getSeconds()
                + segment.getSegment().getEndTimeOffset().getNanos() / 1e9;
        System.out.printf("Segment location: %.3f:%.3f\n", startTime, endTime);
        System.out.println("Confidence: " + segment.getConfidence());
      }
    }

    // process frame label annotations
    for (LabelAnnotation labelAnnotation : results.getFrameLabelAnnotationsList()) {
      System.out.println("Frame label: " + labelAnnotation.getEntity().getDescription());
      // categories
      for (Entity categoryEntity : labelAnnotation.getCategoryEntitiesList()) {
        System.out.println("Frame label category: " + categoryEntity.getDescription());
      }
      // segments
      for (LabelSegment segment : labelAnnotation.getSegmentsList()) {
        double startTime =
            segment.getSegment().getStartTimeOffset().getSeconds()
                + segment.getSegment().getStartTimeOffset().getNanos() / 1e9;
        double endTime =
            segment.getSegment().getEndTimeOffset().getSeconds()
                + segment.getSegment().getEndTimeOffset().getNanos() / 1e9;
        System.out.printf("Segment location: %.3f:%.2f\n", startTime, endTime);
        System.out.println("Confidence: " + segment.getConfidence());
      }
    }
  }
}

Node.js

// Imports the Google Cloud Video Intelligence library
const video = require('@google-cloud/video-intelligence').v1;

// Creates a client
const client = new video.VideoIntelligenceServiceClient();

/**
 * TODO(developer): Uncomment the following line before running the sample.
 */
// const gcsUri = 'GCS URI of the video to analyze, e.g. gs://my-bucket/my-video.mp4';

const request = {
  inputUri: gcsUri,
  features: ['LABEL_DETECTION'],
};

// Detects labels in a video
const [operation] = await client.annotateVideo(request);
console.log('Waiting for operation to complete...');
const [operationResult] = await operation.promise();

// Gets annotations for video
const annotations = operationResult.annotationResults[0];

const labels = annotations.segmentLabelAnnotations;
labels.forEach(label => {
  console.log(`Label ${label.entity.description} occurs at:`);
  label.segments.forEach(segment => {
    const time = segment.segment;
    if (time.startTimeOffset.seconds === undefined) {
      time.startTimeOffset.seconds = 0;
    }
    if (time.startTimeOffset.nanos === undefined) {
      time.startTimeOffset.nanos = 0;
    }
    if (time.endTimeOffset.seconds === undefined) {
      time.endTimeOffset.seconds = 0;
    }
    if (time.endTimeOffset.nanos === undefined) {
      time.endTimeOffset.nanos = 0;
    }
    console.log(
      `\tStart: ${time.startTimeOffset.seconds}` +
        `.${(time.startTimeOffset.nanos / 1e6).toFixed(0)}s`
    );
    console.log(
      `\tEnd: ${time.endTimeOffset.seconds}.` +
        `${(time.endTimeOffset.nanos / 1e6).toFixed(0)}s`
    );
    console.log(`\tConfidence: ${segment.confidence}`);
  });
});

Python

"""Detects labels given a GCS path."""
video_client = videointelligence.VideoIntelligenceServiceClient()
features = [videointelligence.Feature.LABEL_DETECTION]

mode = videointelligence.LabelDetectionMode.SHOT_AND_FRAME_MODE
config = videointelligence.LabelDetectionConfig(label_detection_mode=mode)
context = videointelligence.VideoContext(label_detection_config=config)

operation = video_client.annotate_video(
    request={"features": features, "input_uri": path, "video_context": context}
)
print("\nProcessing video for label annotations:")

result = operation.result(timeout=180)
print("\nFinished processing.")

# Process video/segment level label annotations
segment_labels = result.annotation_results[0].segment_label_annotations
for i, segment_label in enumerate(segment_labels):
    print("Video label description: {}".format(segment_label.entity.description))
    for category_entity in segment_label.category_entities:
        print(
            "\tLabel category description: {}".format(category_entity.description)
        )

    for i, segment in enumerate(segment_label.segments):
        start_time = (
            segment.segment.start_time_offset.seconds
            + segment.segment.start_time_offset.microseconds / 1e6
        )
        end_time = (
            segment.segment.end_time_offset.seconds
            + segment.segment.end_time_offset.microseconds / 1e6
        )
        positions = "{}s to {}s".format(start_time, end_time)
        confidence = segment.confidence
        print("\tSegment {}: {}".format(i, positions))
        print("\tConfidence: {}".format(confidence))
    print("\n")

# Process shot level label annotations
shot_labels = result.annotation_results[0].shot_label_annotations
for i, shot_label in enumerate(shot_labels):
    print("Shot label description: {}".format(shot_label.entity.description))
    for category_entity in shot_label.category_entities:
        print(
            "\tLabel category description: {}".format(category_entity.description)
        )

    for i, shot in enumerate(shot_label.segments):
        start_time = (
            shot.segment.start_time_offset.seconds
            + shot.segment.start_time_offset.microseconds / 1e6
        )
        end_time = (
            shot.segment.end_time_offset.seconds
            + shot.segment.end_time_offset.microseconds / 1e6
        )
        positions = "{}s to {}s".format(start_time, end_time)
        confidence = shot.confidence
        print("\tSegment {}: {}".format(i, positions))
        print("\tConfidence: {}".format(confidence))
    print("\n")

# Process frame level label annotations
frame_labels = result.annotation_results[0].frame_label_annotations
for i, frame_label in enumerate(frame_labels):
    print("Frame label description: {}".format(frame_label.entity.description))
    for category_entity in frame_label.category_entities:
        print(
            "\tLabel category description: {}".format(category_entity.description)
        )

    # Each frame_label_annotation has many frames,
    # here we print information only about the first frame.
    frame = frame_label.frames[0]
    time_offset = frame.time_offset.seconds + frame.time_offset.microseconds / 1e6
    print("\tFirst frame time offset: {}s".format(time_offset))
    print("\tFirst frame confidence: {}".format(frame.confidence))
    print("\n")

其他語言

C#：請按照用戶端程式庫頁面上的 C# 設定操作說明完成相關步驟，然後參閱「.NET 適用的 Video Intelligence 參考文件」。

PHP： 請按照用戶端程式庫頁面上的 PHP 設定操作說明完成相關步驟，然後參閱「PHP 適用的 Video Intelligence 參考文件」。

Ruby：請按照用戶端程式庫頁面上的 Ruby 設定操作說明完成相關步驟，然後參閱「Ruby 適用的 Video Intelligence 參考文件」。