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analyze_object_tracking.php
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analyze_object_tracking.php
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<?php
/**
* Copyright 2019 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.
*/
namespace Google\Cloud\Samples\VideoIntelligence;
// [START video_object_tracking_gcs]
use Google\Cloud\VideoIntelligence\V1\AnnotateVideoRequest;
use Google\Cloud\VideoIntelligence\V1\Client\VideoIntelligenceServiceClient;
use Google\Cloud\VideoIntelligence\V1\Feature;
/**
* @param string $uri The cloud storage object to analyze (gs://your-bucket-name/your-object-name)
* @param int $pollingIntervalSeconds
*/
function analyze_object_tracking(string $uri, int $pollingIntervalSeconds = 0)
{
# Instantiate a client.
$video = new VideoIntelligenceServiceClient();
# Execute a request.
$features = [Feature::OBJECT_TRACKING];
$request = (new AnnotateVideoRequest())
->setInputUri($uri)
->setFeatures($features);
$operation = $video->annotateVideo($request);
# Wait for the request to complete.
$operation->pollUntilComplete([
'pollingIntervalSeconds' => $pollingIntervalSeconds
]);
# Print the results.
if ($operation->operationSucceeded()) {
$results = $operation->getResult()->getAnnotationResults()[0];
# Process video/segment level label annotations
$objectEntity = $results->getObjectAnnotations()[0];
printf('Video object entity: %s' . PHP_EOL, $objectEntity->getEntity()->getEntityId());
printf('Video object description: %s' . PHP_EOL, $objectEntity->getEntity()->getDescription());
$start = $objectEntity->getSegment()->getStartTimeOffset();
$end = $objectEntity->getSegment()->getEndTimeOffset();
printf(' Segment: %ss to %ss' . PHP_EOL,
$start->getSeconds() + $start->getNanos() / 1000000000.0,
$end->getSeconds() + $end->getNanos() / 1000000000.0);
printf(' Confidence: %f' . PHP_EOL, $objectEntity->getConfidence());
foreach ($objectEntity->getFrames() as $objectEntityFrame) {
$offset = $objectEntityFrame->getTimeOffset();
$boundingBox = $objectEntityFrame->getNormalizedBoundingBox();
printf(' Time offset: %ss' . PHP_EOL,
$offset->getSeconds() + $offset->getNanos() / 1000000000.0);
printf(' Bounding box position:' . PHP_EOL);
printf(' Left: %s', $boundingBox->getLeft());
printf(' Top: %s', $boundingBox->getTop());
printf(' Right: %s', $boundingBox->getRight());
printf(' Bottom: %s', $boundingBox->getBottom());
}
print(PHP_EOL);
} else {
print_r($operation->getError());
}
}
// [END video_object_tracking_gcs]
// The following 2 lines are only needed to run the samples
require_once __DIR__ . '/../../testing/sample_helpers.php';
\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);