Cloud Video Intelligence API C++ Client Library

An idiomatic C++ client library for the Cloud Video Intelligence API , a service to detect objects, explicit content, and scene changes in videos. It also specifies the region for annotation and transcribes speech to text.

While this library is GA, please note Google Cloud C++ client libraries do notfollow Semantic Versioning .

Quickstart

The following shows the code that you'll run in the google/cloud/videointelligence/quickstart/ directory, which should give you a taste of the Cloud Video Intelligence API C++ client library API.

 #include "google/cloud/videointelligence/v1/video_intelligence_client.h"
#include <google/protobuf/util/time_util.h>
#include <iostream>

int main(int argc, char* argv[]) try {
  auto constexpr kDefaultUri = "gs://cloud-samples-data/video/animals.mp4";
  if (argc > 2) {
    std::cerr << "Usage: " << argv[0] << " [video-uri]\n"
              << "  The gcs-uri must be in gs://... format and must point to a"
              << " MP4 video.\n"
              << "It defaults to " << kDefaultUri << "\n";
    return 1;
  }
  auto uri = std::string{argc == 2 ? argv[1] : kDefaultUri};

  namespace videointelligence = ::google::cloud::videointelligence_v1;
  auto client = videointelligence::VideoIntelligenceServiceClient(
      videointelligence::MakeVideoIntelligenceServiceConnection());

  using google::cloud::videointelligence::v1::Feature;
  google::cloud::videointelligence::v1::AnnotateVideoRequest request;
  request.set_input_uri(uri);
  request.add_features(Feature::SPEECH_TRANSCRIPTION);
  auto& config =
      *request.mutable_video_context()->mutable_speech_transcription_config();
  config.set_language_code("en-US");  // Adjust based
  config.set_max_alternatives(1);  // We will just print the highest-confidence

  auto future = client.AnnotateVideo(request);
  std::cout << "Waiting for response";
  auto const delay = std::chrono::seconds(5);
  while (future.wait_for(delay) == std::future_status::timeout) {
    std::cout << '.' << std::flush;
  }
  std::cout << "DONE\n";

  auto response = future.get();
  if (!response) throw std::move(response).status();

  for (auto const& result : response->annotation_results()) {
    using ::google::protobuf::util::TimeUtil;
    std::cout << "Segment ["
              << TimeUtil::ToString(result.segment().start_time_offset())
              << ", " << TimeUtil::ToString(result.segment().end_time_offset())
              << "]\n";
    for (auto const& transcription : result.speech_transcriptions()) {
      if (transcription.alternatives().empty()) continue;
      std::cout << transcription.alternatives(0).transcript() << "\n";
    }
  }

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;
}

Main classes

The main class in this library is videointelligence_v1::VideoIntelligenceServiceClient . All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock videointelligence_v1::VideoIntelligenceServiceClient when testing your application.

More Information

Error Handling - describes how the library reports errors.
How to Override the Default Endpoint - describes how to override the default endpoint.
How to Override the Authentication Credentials - describes how to change the authentication credentials used by the library.
Override Retry, Backoff, and Idempotency Policies - describes how to change the default retry policies.
Environment Variables - describes environment variables that can configure the behavior of the library.