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סיווג סרטונים

סיווג סרטונים מזהה אובייקטים, מיקומים, פעילויות, מיני בעלי חיים, מוצרים ועוד.

שימוש ב-AutoML Video

לפני שמתחילים

כדי לקבל מידע נוסף על יצירת מודל AutoML, אפשר לעיין במדריך למתחילים של Vertex AI. הוראות ליצירת מודל AutoML מופיעות בקטע נתוני וידאו במאמר בנושא פיתוח ושימוש במודלים של ML במסמכי התיעוד של Vertex AI.

שימוש במודל AutoML

בדוגמת הקוד הבאה מוצג איך להשתמש במודל AutoML לסיווג סרטונים באמצעות ספריית הלקוח של הסטרימינג.

Java

כדי לבצע אימות ב-Video Intelligence, צריך להגדיר את Application Default Credentials. מידע נוסף זמין במאמר הגדרת אימות לסביבת פיתוח מקומית.


import com.google.api.gax.rpc.BidiStream;
import com.google.cloud.videointelligence.v1p3beta1.LabelAnnotation;
import com.google.cloud.videointelligence.v1p3beta1.LabelFrame;
import com.google.cloud.videointelligence.v1p3beta1.StreamingAnnotateVideoRequest;
import com.google.cloud.videointelligence.v1p3beta1.StreamingAnnotateVideoResponse;
import com.google.cloud.videointelligence.v1p3beta1.StreamingAutomlClassificationConfig;
import com.google.cloud.videointelligence.v1p3beta1.StreamingFeature;
import com.google.cloud.videointelligence.v1p3beta1.StreamingVideoAnnotationResults;
import com.google.cloud.videointelligence.v1p3beta1.StreamingVideoConfig;
import com.google.cloud.videointelligence.v1p3beta1.StreamingVideoIntelligenceServiceClient;
import com.google.protobuf.ByteString;
import io.grpc.StatusRuntimeException;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.concurrent.TimeoutException;

class StreamingAutoMlClassification {

  // Perform streaming video classification with an AutoML Model
  static void streamingAutoMlClassification(String filePath, String projectId, String modelId)
      throws TimeoutException, StatusRuntimeException, IOException {
    // String filePath = "path_to_your_video_file";
    // String projectId = "YOUR_GCP_PROJECT_ID";
    // String modelId = "YOUR_AUTO_ML_CLASSIFICATION_MODEL_ID";

    try (StreamingVideoIntelligenceServiceClient client =
        StreamingVideoIntelligenceServiceClient.create()) {

      Path path = Paths.get(filePath);
      byte[] data = Files.readAllBytes(path);
      // Set the chunk size to 5MB (recommended less than 10MB).
      int chunkSize = 5 * 1024 * 1024;
      int numChunks = (int) Math.ceil((double) data.length / chunkSize);

      String modelPath =
          String.format("projects/%s/locations/us-central1/models/%s", projectId, modelId);

      System.out.println(modelPath);

      StreamingAutomlClassificationConfig streamingAutomlClassificationConfig =
          StreamingAutomlClassificationConfig.newBuilder().setModelName(modelPath).build();

      StreamingVideoConfig streamingVideoConfig =
          StreamingVideoConfig.newBuilder()
              .setFeature(StreamingFeature.STREAMING_AUTOML_CLASSIFICATION)
              .setAutomlClassificationConfig(streamingAutomlClassificationConfig)
              .build();

      BidiStream<StreamingAnnotateVideoRequest, StreamingAnnotateVideoResponse> call =
          client.streamingAnnotateVideoCallable().call();

      // The first request must **only** contain the audio configuration:
      call.send(
          StreamingAnnotateVideoRequest.newBuilder().setVideoConfig(streamingVideoConfig).build());

      // Subsequent requests must **only** contain the audio data.
      // Send the requests in chunks
      for (int i = 0; i < numChunks; i++) {
        call.send(
            StreamingAnnotateVideoRequest.newBuilder()
                .setInputContent(
                    ByteString.copyFrom(
                        Arrays.copyOfRange(data, i * chunkSize, i * chunkSize + chunkSize)))
                .build());
      }

      // Tell the service you are done sending data
      call.closeSend();

      for (StreamingAnnotateVideoResponse response : call) {
        if (response.hasError()) {
          System.out.println(response.getError().getMessage());
          break;
        }

        StreamingVideoAnnotationResults annotationResults = response.getAnnotationResults();

        for (LabelAnnotation annotation : annotationResults.getLabelAnnotationsList()) {
          String entity = annotation.getEntity().getDescription();

          // There is only one frame per annotation
          LabelFrame labelFrame = annotation.getFrames(0);
          double offset =
              labelFrame.getTimeOffset().getSeconds() + labelFrame.getTimeOffset().getNanos() / 1e9;
          float confidence = labelFrame.getConfidence();

          System.out.format("At %fs segment: %s (%f)\n", offset, entity, confidence);
        }
      }
      System.out.println("Video streamed successfully.");
    }
  }
}

Node.js

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// const path = 'Local file to analyze, e.g. ./my-file.mp4';
// const modelId = 'autoMl model'
// const projectId = 'Your GCP Project'

const {StreamingVideoIntelligenceServiceClient} =
  require('@google-cloud/video-intelligence').v1p3beta1;
const fs = require('fs');

// Instantiates a client
const client = new StreamingVideoIntelligenceServiceClient();

// Streaming configuration
const modelPath = `projects/${projectId}/locations/us-central1/models/${modelId}`;
const configRequest = {
  videoConfig: {
    feature: 'STREAMING_AUTOML_CLASSIFICATION',
    automlClassificationConfig: {
      modelName: modelPath,
    },
  },
};

const readStream = fs.createReadStream(path, {
  highWaterMark: 5 * 1024 * 1024, //chunk size set to 5MB (recommended less than 10MB)
  encoding: 'base64',
});
//Load file content
// Note: Input videos must have supported video codecs. See
// https://cloud.google.com/video-intelligence/docs/streaming/streaming#supported_video_codecs
// for more details.
const chunks = [];
readStream
  .on('data', chunk => {
    const request = {
      inputContent: chunk.toString(),
    };
    chunks.push(request);
  })
  .on('close', () => {
    // configRequest should be the first in the stream of requests
    stream.write(configRequest);
    for (let i = 0; i < chunks.length; i++) {
      stream.write(chunks[i]);
    }
    stream.end();
  });

const stream = client
  .streamingAnnotateVideo()
  .on('data', response => {
    //Gets annotations for video
    const annotations = response.annotationResults;
    const labels = annotations.labelAnnotations;
    labels.forEach(label => {
      console.log(
        `Label ${label.entity.description} occurs at: ${
          label.frames[0].timeOffset.seconds || 0
        }` + `.${(label.frames[0].timeOffset.nanos / 1e6).toFixed(0)}s`
      );
      console.log(` Confidence: ${label.frames[0].confidence}`);
    });
  })
  .on('error', response => {
    console.error(response);
  });

Python

import io

from google.cloud import videointelligence_v1p3beta1 as videointelligence

# path = 'path_to_file'
# project_id = 'gcp_project_id'
# model_id = 'automl_classification_model_id'

client = videointelligence.StreamingVideoIntelligenceServiceClient()

model_path = "projects/{}/locations/us-central1/models/{}".format(
    project_id, model_id
)

# Here we use classification as an example.
automl_config = videointelligence.StreamingAutomlClassificationConfig(
    model_name=model_path
)

video_config = videointelligence.StreamingVideoConfig(
    feature=videointelligence.StreamingFeature.STREAMING_AUTOML_CLASSIFICATION,
    automl_classification_config=automl_config,
)

# config_request should be the first in the stream of requests.
config_request = videointelligence.StreamingAnnotateVideoRequest(
    video_config=video_config
)

# Set the chunk size to 5MB (recommended less than 10MB).
chunk_size = 5 * 1024 * 1024

# Load file content.
# Note: Input videos must have supported video codecs. See
# https://cloud.google.com/video-intelligence/docs/streaming/streaming#supported_video_codecs
# for more details.
stream = []
with io.open(path, "rb") as video_file:
    while True:
        data = video_file.read(chunk_size)
        if not data:
            break
        stream.append(data)

def stream_generator():
    yield config_request
    for chunk in stream:
        yield videointelligence.StreamingAnnotateVideoRequest(input_content=chunk)

requests = stream_generator()

# streaming_annotate_video returns a generator.
# The default timeout is about 300 seconds.
# To process longer videos it should be set to
# larger than the length (in seconds) of the stream.
responses = client.streaming_annotate_video(requests, timeout=600)

for response in responses:
    # Check for errors.
    if response.error.message:
        print(response.error.message)
        break

    for label in response.annotation_results.label_annotations:
        for frame in label.frames:
            print(
                "At {:3d}s segment, {:5.1%} {}".format(
                    frame.time_offset.seconds,
                    frame.confidence,
                    label.entity.entity_id,
                )
            )