Function analyzeLabelsLocal

video-intelligence/analyze.js:74–137

(path)

}

async function analyzeLabelsLocal(path) {
  // [START video_analyze_labels]
  // 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`
      );