Function analyzeShots

video-intelligence/analyze.js:139–200

(gcsUri)

}

async function analyzeShots(gcsUri) {
  // [START video_analyze_shots]
  // 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 file to analyze, e.g. gs://my-bucket/my-video.mp4';

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

  // Detects camera shot changes
  const [operation] = await client.annotateVideo(request);
  console.log('Waiting for operation to complete...');
  const [operationResult] = await operation.promise();
  // Gets shot changes
  const shotChanges = operationResult.annotationResults[0].shotAnnotations;
  console.log('Shot changes:');

  if (shotChanges.length === 1) {
    console.log('The entire video is one shot.');
  } else {
    shotChanges.forEach((shot, shotIdx) => {
      console.log(`Scene ${shotIdx} occurs from:`);
      if (shot.startTimeOffset === undefined) {
        shot.startTimeOffset = {};
      }
      if (shot.endTimeOffset === undefined) {
        shot.endTimeOffset = {};
      }
      if (shot.startTimeOffset.seconds === undefined) {
        shot.startTimeOffset.seconds = 0;
      }
      if (shot.startTimeOffset.nanos === undefined) {
        shot.startTimeOffset.nanos = 0;
      }
      if (shot.endTimeOffset.seconds === undefined) {
        shot.endTimeOffset.seconds = 0;
      }
      if (shot.endTimeOffset.nanos === undefined) {
        shot.endTimeOffset.nanos = 0;
      }
      console.log(
        `\tStart: ${shot.startTimeOffset.seconds}` +
          `.${(shot.startTimeOffset.nanos / 1e6).toFixed(0)}s`
      );
      console.log(
        `\tEnd: ${shot.endTimeOffset.seconds}.` +
          `${(shot.endTimeOffset.nanos / 1e6).toFixed(0)}s`
      );
    });