Add video quickstart

Author: Ace Nassri

video/quickstart.js

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+/**
+ * Copyright 2017, Google, Inc.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+// [START videointelligence_quickstart]
+// Imports the Google Cloud Video Intelligence library
+const Video = require('@google-cloud/videointelligence').v1beta1();
+
+// Instantiates a client
+const video = Video.videoIntelligenceServiceClient();
+
+// The GCS filepath of the video to analyze
+const gcsUri = 'gs://nodejs-docs-samples/videointelligence_quickstart.mp4';
+
+// Construct request
+const request = {
+  inputUri: gcsUri,
+  features: ['FACE_DETECTION', 'LABEL_DETECTION', 'SHOT_CHANGE_DETECTION']
+};
+
+// Execute request
+video.annotateVideo(request)
+  .then((results) => {
+    const operation = results[0];
+    console.log('Waiting for operation to complete... (this may take a few minutes)');
+    return operation.promise();
+  })
+  .then((results) => {
+    // Gets annotations for video
+    const annotations = results[0].annotationResults[0];
+
+    // Gets faces for video from its annotations
+    const faces = annotations.faceAnnotations;
+    faces.forEach((face, faceIdx) => {
+      console.log('Thumbnail size:', face.thumbnail.buffer.length);
+      face.segments.forEach((segment, segmentIdx) => {
+        console.log(`Track ${segmentIdx} of face ${faceIdx}: frames ${segment.startTimeOffset} to ${segment.endTimeOffset}`);
+      });
+    });
+
+    // Gets labels for video from its annotations
+    const labels = annotations.labelAnnotations;
+    labels.forEach((label) => {
+      console.log('Label description:', label.description);
+      console.log('Locations:');
+      label.locations.forEach((location) => {
+        console.log(`\tFrames ${location.segment.startTimeOffset} to ${location.segment.endTimeOffset}`);
+      });
+    });
+
+    // Gets shot changes for video from its annotations
+    const shotChanges = annotations.shotAnnotations;
+    shotChanges.forEach((shot, shotIdx) => {
+      console.log(`Scene ${shotIdx}:`);
+      console.log(`\tStart: ${shot.startTimeOffset}`);
+      console.log(`\tEnd: ${shot.endTimeOffset}`);
+    });
+  })
+  .catch((err) => {
+    console.error('ERROR:', err);
+  });
+// [END videointelligence_quickstart]

video/system-test/quickstart.test.js

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+/**
+ * Copyright 2017, Google, Inc.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+const path = require(`path`);
+const test = require(`ava`);
+const tools = require(`@google-cloud/nodejs-repo-tools`);
+
+const cmd = `node quickstart.js`;
+const cwd = path.join(__dirname, `..`);
+
+test(`should analyze a hardcoded video`, async (t) => {
+  const output = await tools.runAsync(cmd, cwd);
+  t.regex(output, /Label description:/);
+  t.regex(output, /Frames \d+ to \d+/);
+  t.regex(output, /Track \d+ of face \d+: frames \d+ to \d+/);
+  t.regex(output, /Scene \d+/);
+});