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Crea un trabajo que pueda usar subtítulos desde un archivo independiente

Crea un trabajo de transcodificación que pueda usar subtítulos de un archivo independiente. Los subtítulos pueden incluir subtítulos y subtítulos cerrados.

Explora más

Para obtener documentación en la que se incluye esta muestra de código, consulta lo siguiente:

Cómo agregar subtítulos

Muestra de código

Go

Antes de probar esta muestra, sigue las instrucciones de configuración de Go que se encuentran en el Guía de inicio rápido de la API de Transcoder con bibliotecas cliente. Si deseas obtener más información, consulta la documentación de referencia de la API de Go de la API de Transcoder.

Para autenticarte en la API de Transcoder, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

import (
	"context"
	"fmt"
	"io"

	"github.com/golang/protobuf/ptypes/duration"

	transcoder "cloud.google.com/go/video/transcoder/apiv1"
	"cloud.google.com/go/video/transcoder/apiv1/transcoderpb"
)

// createJobWithStandaloneCaptions creates a job that can use subtitles from a
// standalone file. See https://cloud.google.com/transcoder/docs/how-to/captions-and-subtitles
// for more information.
func createJobWithStandaloneCaptions(w io.Writer, projectID string, location string, inputVideoURI string, inputSubtitles1URI string, inputSubtitles2URI string, outputURI string) error {
	// projectID := "my-project-id"
	// location := "us-central1"
	// inputVideoURI := "gs://my-bucket/my-video-file"
	// inputSubtitles1URI := "gs://my-bucket/my-subtitles-file1"
	// inputSubtitles2URI := "gs://my-bucket/my-subtitles-file2"
	// outputURI := "gs://my-bucket/my-output-folder/"

	ctx := context.Background()
	client, err := transcoder.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("NewClient: %w", err)
	}
	defer client.Close()

	// Set up elementary streams. The InputKey field refers to inputs in
	// the Inputs array defined the job config.
	elementaryStreams := []*transcoderpb.ElementaryStream{
		{
			Key: "video_stream0",
			ElementaryStream: &transcoderpb.ElementaryStream_VideoStream{
				VideoStream: &transcoderpb.VideoStream{
					CodecSettings: &transcoderpb.VideoStream_H264{
						H264: &transcoderpb.VideoStream_H264CodecSettings{
							BitrateBps:   550000,
							FrameRate:    60,
							HeightPixels: 360,
							WidthPixels:  640,
						},
					},
				},
			},
		},
		{
			Key: "audio_stream0",
			ElementaryStream: &transcoderpb.ElementaryStream_AudioStream{
				AudioStream: &transcoderpb.AudioStream{
					Codec:      "aac",
					BitrateBps: 64000,
				},
			},
		},
		{
			Key: "vtt_stream_en",
			ElementaryStream: &transcoderpb.ElementaryStream_TextStream{
				TextStream: &transcoderpb.TextStream{
					Codec:        "webvtt",
					LanguageCode: "en-US",
					DisplayName:  "English",
					Mapping: []*transcoderpb.TextStream_TextMapping{
						{
							AtomKey:  "atom0",
							InputKey: "subtitle_input_en",
						},
					},
				},
			},
		},
		{
			Key: "vtt_stream_es",
			ElementaryStream: &transcoderpb.ElementaryStream_TextStream{
				TextStream: &transcoderpb.TextStream{
					Codec:        "webvtt",
					LanguageCode: "es-ES",
					DisplayName:  "Spanish",
					Mapping: []*transcoderpb.TextStream_TextMapping{
						{
							AtomKey:  "atom0",
							InputKey: "subtitle_input_es",
						},
					},
				},
			},
		},
	}

	req := &transcoderpb.CreateJobRequest{
		Parent: fmt.Sprintf("projects/%s/locations/%s", projectID, location),
		Job: &transcoderpb.Job{
			OutputUri: outputURI,
			JobConfig: &transcoderpb.Job_Config{
				Config: &transcoderpb.JobConfig{
					Inputs: []*transcoderpb.Input{
						{
							Key: "input0",
							Uri: inputVideoURI,
						},
						{
							Key: "subtitle_input_en",
							Uri: inputSubtitles1URI,
						},
						{
							Key: "subtitle_input_es",
							Uri: inputSubtitles2URI,
						},
					},
					EditList: []*transcoderpb.EditAtom{
						{
							Key:    "atom0",
							Inputs: []string{"input0", "subtitle_input_en", "subtitle_input_es"},
						},
					},
					ElementaryStreams: elementaryStreams,
					MuxStreams: []*transcoderpb.MuxStream{
						{
							Key:               "sd-hls-fmp4",
							Container:         "fmp4",
							ElementaryStreams: []string{"video_stream0"},
						},
						{
							Key:               "audio-hls-fmp4",
							Container:         "fmp4",
							ElementaryStreams: []string{"audio_stream0"},
						},
						{
							Key:               "text-vtt-en",
							Container:         "vtt",
							ElementaryStreams: []string{"vtt_stream_en"},
							SegmentSettings: &transcoderpb.SegmentSettings{
								SegmentDuration: &duration.Duration{
									Seconds: 6,
								},
								IndividualSegments: true,
							},
						},
						{
							Key:               "text-vtt-es",
							Container:         "vtt",
							ElementaryStreams: []string{"vtt_stream_es"},
							SegmentSettings: &transcoderpb.SegmentSettings{
								SegmentDuration: &duration.Duration{
									Seconds: 6,
								},
								IndividualSegments: true,
							},
						},
					},
					Manifests: []*transcoderpb.Manifest{
						{
							FileName:   "manifest.m3u8",
							Type:       transcoderpb.Manifest_HLS,
							MuxStreams: []string{"sd-hls-fmp4", "audio-hls-fmp4", "text-vtt-en", "text-vtt-es"},
						},
					},
				},
			},
		},
	}
	// Creates the job. Jobs take a variable amount of time to run.
	// You can query for the job state; see getJob() in get_job.go.
	response, err := client.CreateJob(ctx, req)
	if err != nil {
		return fmt.Errorf("CreateJob: %w", err)
	}

	fmt.Fprintf(w, "Job: %v", response.GetName())
	return nil
}

Java

Antes de probar esta muestra, sigue las instrucciones de configuración de Java que se encuentran en la Guía de inicio rápido de la API de Transcoder para usar bibliotecas cliente. Para obtener más información, consulta la API de Java de la API de Transcoder documentación de referencia.


import com.google.cloud.video.transcoder.v1.AudioStream;
import com.google.cloud.video.transcoder.v1.CreateJobRequest;
import com.google.cloud.video.transcoder.v1.EditAtom;
import com.google.cloud.video.transcoder.v1.ElementaryStream;
import com.google.cloud.video.transcoder.v1.Input;
import com.google.cloud.video.transcoder.v1.Job;
import com.google.cloud.video.transcoder.v1.JobConfig;
import com.google.cloud.video.transcoder.v1.LocationName;
import com.google.cloud.video.transcoder.v1.Manifest;
import com.google.cloud.video.transcoder.v1.Manifest.ManifestType;
import com.google.cloud.video.transcoder.v1.MuxStream;
import com.google.cloud.video.transcoder.v1.Output;
import com.google.cloud.video.transcoder.v1.SegmentSettings;
import com.google.cloud.video.transcoder.v1.TextStream;
import com.google.cloud.video.transcoder.v1.TextStream.TextMapping;
import com.google.cloud.video.transcoder.v1.TranscoderServiceClient;
import com.google.cloud.video.transcoder.v1.VideoStream;
import com.google.protobuf.Duration;
import java.io.IOException;

public class CreateJobWithStandaloneCaptions {

  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "my-project-id";
    String location = "us-central1";
    String inputVideoUri = "gs://my-bucket/my-video-file";
    String inputCaptionsUri = "gs://my-bucket/my-captions-file";
    String outputUri = "gs://my-bucket/my-output-folder/";

    createJobWithStandaloneCaptions(
        projectId, location, inputVideoUri, inputCaptionsUri, outputUri);
  }

  // Creates a job from an ad-hoc configuration that can use captions from a standalone file.
  public static void createJobWithStandaloneCaptions(
      String projectId,
      String location,
      String inputVideoUri,
      String inputCaptionsUri,
      String outputUri)
      throws IOException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests.
    try (TranscoderServiceClient transcoderServiceClient = TranscoderServiceClient.create()) {

      VideoStream videoStream0 =
          VideoStream.newBuilder()
              .setH264(
                  VideoStream.H264CodecSettings.newBuilder()
                      .setBitrateBps(550000)
                      .setFrameRate(60)
                      .setHeightPixels(360)
                      .setWidthPixels(640))
              .build();

      AudioStream audioStream0 =
          AudioStream.newBuilder().setCodec("aac").setBitrateBps(64000).build();

      TextStream textStream0 =
          TextStream.newBuilder()
              .setCodec("webvtt")
              .addMapping(
                  0,
                  TextMapping.newBuilder()
                      .setAtomKey("atom0")
                      .setInputKey("caption_input0")
                      .setInputTrack(0)
                      .build())
              .build();

      JobConfig config =
          JobConfig.newBuilder()
              .addInputs(Input.newBuilder().setKey("input0").setUri(inputVideoUri))
              .addInputs(Input.newBuilder().setKey("caption_input0").setUri(inputCaptionsUri))
              .addEditList(
                  0, // Index in the edit list
                  EditAtom.newBuilder()
                      .setKey("atom0")
                      .addInputs("input0")
                      .addInputs("caption_input0")
                      .build())
              .setOutput(Output.newBuilder().setUri(outputUri))
              .addElementaryStreams(
                  ElementaryStream.newBuilder()
                      .setKey("video_stream0")
                      .setVideoStream(videoStream0))
              .addElementaryStreams(
                  ElementaryStream.newBuilder()
                      .setKey("audio_stream0")
                      .setAudioStream(audioStream0))
              .addElementaryStreams(
                  ElementaryStream.newBuilder().setKey("vtt_stream0").setTextStream(textStream0))
              .addMuxStreams(
                  0,
                  MuxStream.newBuilder()
                      .setKey("sd_hls_fmp4")
                      .setContainer("fmp4")
                      .addElementaryStreams("video_stream0")
                      .build())
              .addMuxStreams(
                  1,
                  MuxStream.newBuilder()
                      .setKey("audio_hls_fmp4")
                      .setContainer("fmp4")
                      .addElementaryStreams("audio_stream0")
                      .build())
              .addMuxStreams(
                  2,
                  MuxStream.newBuilder()
                      .setKey("text_vtt")
                      .setContainer("vtt")
                      .addElementaryStreams("vtt_stream0")
                      .setSegmentSettings(
                          SegmentSettings.newBuilder()
                              .setSegmentDuration(Duration.newBuilder().setSeconds(6).build())
                              .setIndividualSegments(true)
                              .build())
                      .build())
              .addManifests(
                  0,
                  Manifest.newBuilder()
                      .setFileName("manifest.m3u8")
                      .setType(ManifestType.HLS)
                      .addMuxStreams("sd_hls_fmp4")
                      .addMuxStreams("audio_hls_fmp4")
                      .addMuxStreams("text_vtt")
                      .build())
              .build();

      CreateJobRequest createJobRequest =
          CreateJobRequest.newBuilder()
              .setJob(Job.newBuilder().setOutputUri(outputUri).setConfig(config).build())
              .setParent(LocationName.of(projectId, location).toString())
              .build();

      // Send the job creation request and process the response.
      Job job = transcoderServiceClient.createJob(createJobRequest);
      System.out.println("Job: " + job.getName());
    }
  }
}

Node.js

Antes de probar esta muestra, sigue las instrucciones de configuración de Node.js que se encuentran en la Guía de inicio rápido de la API de Transcoder para usar bibliotecas cliente. Si deseas obtener más información, consulta la documentación de referencia de la API de Node.js de la API de Transcoder.

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// projectId = 'my-project-id';
// location = 'us-central1';
// inputVideoUri = 'gs://my-bucket/my-video-file';
// inputSubtitles1Uri = 'gs://my-bucket/my-captions-file1';
// inputSubtitles2Uri = 'gs://my-bucket/my-captions-file2';
// outputUri = 'gs://my-bucket/my-output-folder/';

// Imports the Transcoder library
const {TranscoderServiceClient} =
  require('@google-cloud/video-transcoder').v1;

// Instantiates a client
const transcoderServiceClient = new TranscoderServiceClient();

async function createJobWithStandaloneCaptions() {
  // Construct request
  const request = {
    parent: transcoderServiceClient.locationPath(projectId, location),
    job: {
      outputUri: outputUri,
      config: {
        inputs: [
          {
            key: 'input0',
            uri: inputVideoUri,
          },
          {
            key: 'subtitle_input_en',
            uri: inputSubtitles1Uri,
          },
          {
            key: 'subtitle_input_es',
            uri: inputSubtitles2Uri,
          },
        ],
        editList: [
          {
            key: 'atom0',
            inputs: ['input0', 'subtitle_input_en', 'subtitle_input_es'],
          },
        ],
        elementaryStreams: [
          {
            key: 'video-stream0',
            videoStream: {
              h264: {
                heightPixels: 360,
                widthPixels: 640,
                bitrateBps: 550000,
                frameRate: 60,
              },
            },
          },
          {
            key: 'audio-stream0',
            audioStream: {
              codec: 'aac',
              bitrateBps: 64000,
            },
          },
          {
            key: 'vtt-stream-en',
            textStream: {
              codec: 'webvtt',
              languageCode: 'en-US',
              displayName: 'English',
              mapping: [
                {
                  atomKey: 'atom0',
                  inputKey: 'subtitle_input_en',
                },
              ],
            },
          },
          {
            key: 'vtt-stream-es',
            textStream: {
              codec: 'webvtt',
              languageCode: 'es-ES',
              displayName: 'Spanish',
              mapping: [
                {
                  atomKey: 'atom0',
                  inputKey: 'subtitle_input_es',
                },
              ],
            },
          },
        ],
        muxStreams: [
          {
            key: 'sd-hls-fmp4',
            container: 'fmp4',
            elementaryStreams: ['video-stream0'],
          },
          {
            key: 'audio-hls-fmp4',
            container: 'fmp4',
            elementaryStreams: ['audio-stream0'],
          },
          {
            key: 'text-vtt-en',
            container: 'vtt',
            elementaryStreams: ['vtt-stream-en'],
            segmentSettings: {
              segmentDuration: {
                seconds: 6,
              },
              individualSegments: true,
            },
          },
          {
            key: 'text-vtt-es',
            container: 'vtt',
            elementaryStreams: ['vtt-stream-es'],
            segmentSettings: {
              segmentDuration: {
                seconds: 6,
              },
              individualSegments: true,
            },
          },
        ],
        manifests: [
          {
            fileName: 'manifest.m3u8',
            type: 'HLS',
            muxStreams: [
              'sd-hls-fmp4',
              'audio-hls-fmp4',
              'text-vtt-en',
              'text-vtt-es',
            ],
          },
        ],
      },
    },
  };

  // Run request
  const [response] = await transcoderServiceClient.createJob(request);
  console.log(`Job: ${response.name}`);
}

createJobWithStandaloneCaptions();

Python

Antes de probar esta muestra, sigue las instrucciones de configuración de Python que se encuentran en el Guía de inicio rápido de la API de Transcoder con bibliotecas cliente. Si deseas obtener más información, consulta la documentación de referencia de la API de Python de la API de Transcoder.


import argparse

from google.cloud.video import transcoder_v1
from google.cloud.video.transcoder_v1.services.transcoder_service import (
    TranscoderServiceClient,
)
from google.protobuf import duration_pb2 as duration


def create_job_with_standalone_captions(
    project_id: str,
    location: str,
    input_video_uri: str,
    input_subtitles1_uri: str,
    input_subtitles2_uri: str,
    output_uri: str,
) -> transcoder_v1.types.resources.Job:
    """Creates a job based on an ad-hoc job configuration that can use subtitles from a standalone file.

    Args:
        project_id (str): The GCP project ID.
        location (str): The location to start the job in.
        input_video_uri (str): Uri of the input video in the Cloud Storage
          bucket.
        input_subtitles1_uri (str): Uri of an input subtitles file in the Cloud
          Storage bucket.
        input_subtitles2_uri (str): Uri of an input subtitles file in the Cloud
          Storage bucket.
        output_uri (str): Uri of the video output folder in the Cloud Storage
          bucket.

    Returns:
        The job resource.
    """

    client = TranscoderServiceClient()

    parent = f"projects/{project_id}/locations/{location}"
    job = transcoder_v1.types.Job()
    job.output_uri = output_uri
    job.config = transcoder_v1.types.JobConfig(
        inputs=[
            transcoder_v1.types.Input(
                key="input0",
                uri=input_video_uri,
            ),
            transcoder_v1.types.Input(
                key="subtitle-input-en",
                uri=input_subtitles1_uri,
            ),
            transcoder_v1.types.Input(
                key="subtitle-input-es",
                uri=input_subtitles2_uri,
            ),
        ],
        edit_list=[
            transcoder_v1.types.EditAtom(
                key="atom0",
                inputs=["input0", "subtitle-input-en", "subtitle-input-es"],
            ),
        ],
        elementary_streams=[
            transcoder_v1.types.ElementaryStream(
                key="video-stream0",
                video_stream=transcoder_v1.types.VideoStream(
                    h264=transcoder_v1.types.VideoStream.H264CodecSettings(
                        height_pixels=360,
                        width_pixels=640,
                        bitrate_bps=550000,
                        frame_rate=60,
                    ),
                ),
            ),
            transcoder_v1.types.ElementaryStream(
                key="audio-stream0",
                audio_stream=transcoder_v1.types.AudioStream(
                    codec="aac",
                    bitrate_bps=64000,
                ),
            ),
            transcoder_v1.types.ElementaryStream(
                key="vtt-stream-en",
                text_stream=transcoder_v1.types.TextStream(
                    codec="webvtt",
                    language_code="en-US",
                    display_name="English",
                    mapping_=[
                        transcoder_v1.types.TextStream.TextMapping(
                            atom_key="atom0",
                            input_key="subtitle-input-en",
                        ),
                    ],
                ),
            ),
            transcoder_v1.types.ElementaryStream(
                key="vtt-stream-es",
                text_stream=transcoder_v1.types.TextStream(
                    codec="webvtt",
                    language_code="es-ES",
                    display_name="Spanish",
                    mapping_=[
                        transcoder_v1.types.TextStream.TextMapping(
                            atom_key="atom0",
                            input_key="subtitle-input-es",
                        ),
                    ],
                ),
            ),
        ],
        mux_streams=[
            transcoder_v1.types.MuxStream(
                key="sd-hls-fmp4",
                container="fmp4",
                elementary_streams=["video-stream0"],
            ),
            transcoder_v1.types.MuxStream(
                key="audio-hls-fmp4",
                container="fmp4",
                elementary_streams=["audio-stream0"],
            ),
            transcoder_v1.types.MuxStream(
                key="text-vtt-en",
                container="vtt",
                elementary_streams=["vtt-stream-en"],
                segment_settings=transcoder_v1.types.SegmentSettings(
                    segment_duration=duration.Duration(
                        seconds=6,
                    ),
                    individual_segments=True,
                ),
            ),
            transcoder_v1.types.MuxStream(
                key="text-vtt-es",
                container="vtt",
                elementary_streams=["vtt-stream-es"],
                segment_settings=transcoder_v1.types.SegmentSettings(
                    segment_duration=duration.Duration(
                        seconds=6,
                    ),
                    individual_segments=True,
                ),
            ),
        ],
        manifests=[
            transcoder_v1.types.Manifest(
                file_name="manifest.m3u8",
                type_="HLS",
                mux_streams=[
                    "sd-hls-fmp4",
                    "audio-hls-fmp4",
                    "text-vtt-en",
                    "text-vtt-es",
                ],
            ),
        ],
    )
    response = client.create_job(parent=parent, job=job)
    print(f"Job: {response.name}")
    return response

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