Criar um canal com uma entrada de backup

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Crie um canal com dois streams de entrada, em que um fluxo de entrada é o backup do outro. Se o stream de entrada principal for desconectado devido a problemas de rede, o canal alternará automaticamente para usar o stream de entrada de backup como a fonte de entrada. Quando o stream de entrada principal volta a ficar on-line, o canal volta automaticamente para o stream de entrada principal como fonte de entrada.

Mais informações

Para ver a documentação detalhada que inclui este exemplo de código, consulte:

Exemplo de código

C#

Antes de testar esta amostra, siga as instruções de configuração da C# no guia de início rápido da API Live Stream usando bibliotecas de cliente. Para mais informações, consulte a documentação de referência da API C# da API Live Stream.


using Google.Api.Gax.ResourceNames;
using Google.Cloud.Video.LiveStream.V1;
using Google.LongRunning;
using System.Threading.Tasks;

public class CreateChannelWithBackupInputSample
{
    public async Task<Channel> CreateChannelWithBackupInputAsync(
         string projectId, string locationId, string channelId, string primaryInputId, string backupInputId, string outputUri)
    {
        // Create the client.
        LivestreamServiceClient client = LivestreamServiceClient.Create();

        InputAttachment primaryInputAttachment = new InputAttachment
        {
            Key = "my-primary-input",
            InputAsInputName = InputName.FromProjectLocationInput(projectId, locationId, primaryInputId),
            AutomaticFailover = new InputAttachment.Types.AutomaticFailover
            {
                InputKeys = { "my-backup-input" }
            }
        };

        InputAttachment backupInputAttachment = new InputAttachment
        {
            Key = "my-backup-input",
            InputAsInputName = InputName.FromProjectLocationInput(projectId, locationId, backupInputId)
        };

        VideoStream videoStream = new VideoStream
        {
            H264 = new VideoStream.Types.H264CodecSettings
            {
                Profile = "high",
                BitrateBps = 3000000,
                FrameRate = 30,
                HeightPixels = 720,
                WidthPixels = 1280
            }
        };

        ElementaryStream elementaryStreamVideo = new ElementaryStream
        {
            Key = "es_video",
            VideoStream = videoStream
        };

        AudioStream audioStream = new AudioStream
        {
            Codec = "aac",
            ChannelCount = 2,
            BitrateBps = 160000
        };

        ElementaryStream elementaryStreamAudio = new ElementaryStream
        {
            Key = "es_audio",
            AudioStream = audioStream
        };

        MuxStream muxVideo = new MuxStream
        {
            Key = "mux_video",
            ElementaryStreams = { "es_video" },
            SegmentSettings = new SegmentSettings
            {
                SegmentDuration = new Google.Protobuf.WellKnownTypes.Duration
                {
                    Seconds = 2
                }
            }
        };

        MuxStream muxAudio = new MuxStream
        {
            Key = "mux_audio",
            ElementaryStreams = { "es_audio" },
            SegmentSettings = new SegmentSettings
            {
                SegmentDuration = new Google.Protobuf.WellKnownTypes.Duration
                {
                    Seconds = 2
                }
            }
        };

        CreateChannelRequest request = new CreateChannelRequest
        {
            ParentAsLocationName = LocationName.FromProjectLocation(projectId, locationId),
            ChannelId = channelId,
            Channel = new Channel
            {
                InputAttachments = { primaryInputAttachment, backupInputAttachment },
                Output = new Channel.Types.Output
                {
                    Uri = outputUri
                },
                ElementaryStreams = { elementaryStreamVideo, elementaryStreamAudio },
                MuxStreams = { muxVideo, muxAudio },
                Manifests = {
                    new Manifest {
                        FileName = "manifest.m3u8",
                        Type = Manifest.Types.ManifestType.Hls,
                        MuxStreams = { "mux_video", "mux_audio" },
                        MaxSegmentCount = 5
                    }
                }
            }
        };

        // Make the request.
        Operation<Channel, OperationMetadata> response = await client.CreateChannelAsync(request);

        // Poll until the returned long-running operation is complete.
        Operation<Channel, OperationMetadata> completedResponse = await response.PollUntilCompletedAsync();

        // Retrieve the operation result.
        return completedResponse.Result;
    }
}

Go

Antes de testar esta amostra, siga as instruções de configuração da Go no guia de início rápido da API Live Stream usando bibliotecas de cliente. Para mais informações, consulte a documentação de referência da API Go da API Live Stream.

import (
	"context"
	"fmt"
	"io"

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

	livestream "cloud.google.com/go/video/livestream/apiv1"
	livestreampb "google.golang.org/genproto/googleapis/cloud/video/livestream/v1"
)

// createChannelWithBackupInput creates a channel with a failover backup input.
func createChannelWithBackupInput(w io.Writer, projectID, location, channelID, primaryInputID, backupInputID, outputURI string) error {
	// projectID := "my-project-id"
	// location := "us-central1"
	// channelID := "my-channel"
	// primaryInputID := "my-primary-input"
	// backupInputID := "my-backup-input"
	// outputURI := "gs://my-bucket/my-output-folder/"
	ctx := context.Background()
	client, err := livestream.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("NewClient: %v", err)
	}
	defer client.Close()

	primaryInput := fmt.Sprintf("projects/%s/locations/%s/inputs/%s", projectID, location, primaryInputID)
	backupInput := fmt.Sprintf("projects/%s/locations/%s/inputs/%s", projectID, location, backupInputID)
	automaticFailover := &livestreampb.InputAttachment_AutomaticFailover{
		InputKeys: []string{"my-backup-input"},
	}

	req := &livestreampb.CreateChannelRequest{
		Parent:    fmt.Sprintf("projects/%s/locations/%s", projectID, location),
		ChannelId: channelID,
		Channel: &livestreampb.Channel{
			InputAttachments: []*livestreampb.InputAttachment{
				{
					Key:               "my-primary-input",
					Input:             primaryInput,
					AutomaticFailover: automaticFailover,
				},
				{
					Key:   "my-backup-input",
					Input: backupInput,
				},
			},
			Output: &livestreampb.Channel_Output{
				Uri: outputURI,
			},
			ElementaryStreams: []*livestreampb.ElementaryStream{
				{
					Key: "es_video",
					ElementaryStream: &livestreampb.ElementaryStream_VideoStream{
						VideoStream: &livestreampb.VideoStream{
							CodecSettings: &livestreampb.VideoStream_H264{
								H264: &livestreampb.VideoStream_H264CodecSettings{
									Profile:      "high",
									BitrateBps:   3000000,
									FrameRate:    30,
									HeightPixels: 720,
									WidthPixels:  1280,
								},
							},
						},
					},
				},
				{
					Key: "es_audio",
					ElementaryStream: &livestreampb.ElementaryStream_AudioStream{
						AudioStream: &livestreampb.AudioStream{
							Codec:        "aac",
							ChannelCount: 2,
							BitrateBps:   160000,
						},
					},
				},
			},
			MuxStreams: []*livestreampb.MuxStream{
				{
					Key:               "mux_video",
					ElementaryStreams: []string{"es_video"},
					SegmentSettings: &livestreampb.SegmentSettings{
						SegmentDuration: &duration.Duration{
							Seconds: 2,
						},
					},
				},
				{
					Key:               "mux_audio",
					ElementaryStreams: []string{"es_audio"},
					SegmentSettings: &livestreampb.SegmentSettings{
						SegmentDuration: &duration.Duration{
							Seconds: 2,
						},
					},
				},
			},
			Manifests: []*livestreampb.Manifest{
				{
					FileName:        "manifest.m3u8",
					Type:            livestreampb.Manifest_HLS,
					MuxStreams:      []string{"mux_video", "mux_audio"},
					MaxSegmentCount: 5,
				},
			},
		},
	}
	// Creates the channel.
	op, err := client.CreateChannel(ctx, req)
	if err != nil {
		return fmt.Errorf("CreateChannel: %v", err)
	}
	response, err := op.Wait(ctx)
	if err != nil {
		return fmt.Errorf("Wait: %v", err)
	}

	fmt.Fprintf(w, "Channel: %v", response.Name)
	return nil
}

Java

Antes de testar esta amostra, siga as instruções de configuração da Java no guia de início rápido da API Live Stream usando bibliotecas de cliente. Para mais informações, consulte a documentação de referência da API Java da API Live Stream.


import com.google.cloud.video.livestream.v1.AudioStream;
import com.google.cloud.video.livestream.v1.Channel;
import com.google.cloud.video.livestream.v1.Channel.Output;
import com.google.cloud.video.livestream.v1.CreateChannelRequest;
import com.google.cloud.video.livestream.v1.ElementaryStream;
import com.google.cloud.video.livestream.v1.InputAttachment;
import com.google.cloud.video.livestream.v1.InputAttachment.AutomaticFailover;
import com.google.cloud.video.livestream.v1.InputName;
import com.google.cloud.video.livestream.v1.LivestreamServiceClient;
import com.google.cloud.video.livestream.v1.LocationName;
import com.google.cloud.video.livestream.v1.Manifest;
import com.google.cloud.video.livestream.v1.Manifest.ManifestType;
import com.google.cloud.video.livestream.v1.MuxStream;
import com.google.cloud.video.livestream.v1.SegmentSettings;
import com.google.cloud.video.livestream.v1.VideoStream;
import com.google.cloud.video.livestream.v1.VideoStream.H264CodecSettings;
import com.google.protobuf.Duration;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateChannelWithBackupInput {

  public static void main(String[] args) throws Exception {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "my-project-id";
    String location = "us-central1";
    String channelId = "my-channel-id";
    String primaryInputId = "my-primary-input-id";
    String backupInputId = "my-backup-input-id";
    String outputUri = "gs://my-bucket/my-output-folder/";

    createChannelWithBackupInput(
        projectId, location, channelId, primaryInputId, backupInputId, outputUri);
  }

  public static void createChannelWithBackupInput(
      String projectId,
      String location,
      String channelId,
      String primaryInputId,
      String backupInputId,
      String outputUri)
      throws InterruptedException, ExecutionException, TimeoutException, 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. After completing all of your requests, call
    // the "close" method on the client to safely clean up any remaining background resources.
    try (LivestreamServiceClient livestreamServiceClient = LivestreamServiceClient.create()) {
      VideoStream videoStream =
          VideoStream.newBuilder()
              .setH264(
                  H264CodecSettings.newBuilder()
                      .setProfile("high")
                      .setBitrateBps(3000000)
                      .setFrameRate(30)
                      .setHeightPixels(720)
                      .setWidthPixels(1280))
              .build();

      AudioStream audioStream =
          AudioStream.newBuilder().setCodec("aac").setChannelCount(2).setBitrateBps(160000).build();

      var createChannelRequest =
          CreateChannelRequest.newBuilder()
              .setParent(LocationName.of(projectId, location).toString())
              .setChannelId(channelId)
              .setChannel(
                  Channel.newBuilder()
                      .addInputAttachments(
                          0,
                          InputAttachment.newBuilder()
                              .setKey("my-primary-input")
                              .setInput(
                                  InputName.of(projectId, location, primaryInputId).toString())
                              .setAutomaticFailover(
                                  AutomaticFailover.newBuilder()
                                      .addInputKeys("my-backup-input")
                                      .build())
                              .build())
                      .addInputAttachments(
                          1,
                          InputAttachment.newBuilder()
                              .setKey("my-backup-input")
                              .setInput(
                                  InputName.of(projectId, location, backupInputId).toString()))
                      .setOutput(Output.newBuilder().setUri(outputUri).build())
                      .addElementaryStreams(
                          ElementaryStream.newBuilder()
                              .setKey("es_video")
                              .setVideoStream(videoStream))
                      .addElementaryStreams(
                          ElementaryStream.newBuilder()
                              .setKey("es_audio")
                              .setAudioStream(audioStream))
                      .addMuxStreams(
                          MuxStream.newBuilder()
                              .setKey("mux_video")
                              .addElementaryStreams("es_video")
                              .setSegmentSettings(
                                  SegmentSettings.newBuilder()
                                      .setSegmentDuration(
                                          Duration.newBuilder().setSeconds(2).build())
                                      .build())
                              .build())
                      .addMuxStreams(
                          MuxStream.newBuilder()
                              .setKey("mux_audio")
                              .addElementaryStreams("es_audio")
                              .setSegmentSettings(
                                  SegmentSettings.newBuilder()
                                      .setSegmentDuration(
                                          Duration.newBuilder().setSeconds(2).build())
                                      .build())
                              .build())
                      .addManifests(
                          Manifest.newBuilder()
                              .setFileName("manifest.m3u8")
                              .setType(ManifestType.HLS)
                              .addMuxStreams("mux_video")
                              .addMuxStreams("mux_audio")
                              .setMaxSegmentCount(5)
                              .build()))
              .build();
      // First API call in a project can take up to 10 minutes.
      Channel result =
          livestreamServiceClient
              .createChannelAsync(createChannelRequest)
              .get(10, TimeUnit.MINUTES);
      System.out.println("Channel: " + result.getName());
    }
  }
}

Node.js

Antes de testar esta amostra, siga as instruções de configuração da Node.js no guia de início rápido da API Live Stream usando bibliotecas de cliente. Para mais informações, consulte a documentação de referência da API Node.js da API Live Stream.

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// projectId = 'my-project-id';
// location = 'us-central1';
// channelId = 'my-channel';
// primaryInputId = 'my-primary-input';
// backupInputId = 'my-backup-input';
// outputUri = 'gs://my-bucket/my-output-folder/';

// Imports the Livestream library
const {LivestreamServiceClient} = require('@google-cloud/livestream').v1;

// Instantiates a client
const livestreamServiceClient = new LivestreamServiceClient();

async function createChannelWithBackupInput() {
  // Construct request
  const request = {
    parent: livestreamServiceClient.locationPath(projectId, location),
    channelId: channelId,
    channel: {
      inputAttachments: [
        {
          key: 'my-primary-input',
          input: livestreamServiceClient.inputPath(
            projectId,
            location,
            primaryInputId
          ),
          automaticFailover: {
            inputKeys: ['my-backup-input'],
          },
        },
        {
          key: 'my-backup-input',
          input: livestreamServiceClient.inputPath(
            projectId,
            location,
            backupInputId
          ),
        },
      ],
      output: {
        uri: outputUri,
      },
      elementaryStreams: [
        {
          key: 'es_video',
          videoStream: {
            h264: {
              profile: 'high',
              heightPixels: 720,
              widthPixels: 1280,
              bitrateBps: 3000000,
              frameRate: 30,
            },
          },
        },
        {
          key: 'es_audio',
          audioStream: {
            codec: 'aac',
            channelCount: 2,
            bitrateBps: 160000,
          },
        },
      ],
      muxStreams: [
        {
          key: 'mux_video',
          elementaryStreams: ['es_video'],
          segmentSettings: {
            seconds: 2,
          },
        },
        {
          key: 'mux_audio',
          elementaryStreams: ['es_audio'],
          segmentSettings: {
            seconds: 2,
          },
        },
      ],
      manifests: [
        {
          fileName: 'manifest.m3u8',
          type: 'HLS',
          muxStreams: ['mux_video', 'mux_audio'],
          maxSegmentCount: 5,
        },
      ],
    },
  };

  // Run request
  const [operation] = await livestreamServiceClient.createChannel(request);
  const response = await operation.promise();
  const [channel] = response;
  console.log(`Channel: ${channel.name}`);
}

createChannelWithBackupInput();

Python

Antes de testar esta amostra, siga as instruções de configuração da Python no guia de início rápido da API Live Stream usando bibliotecas de cliente. Para mais informações, consulte a documentação de referência da API Python da API Live Stream.


import argparse

from google.cloud.video import live_stream_v1
from google.cloud.video.live_stream_v1.services.livestream_service import (
    LivestreamServiceClient,
)
from google.protobuf import duration_pb2 as duration

def create_channel_with_backup_input(
    project_id: str,
    location: str,
    channel_id: str,
    primary_input_id: str,
    backup_input_id: str,
    output_uri: str,
) -> str:
    """Creates a channel.
    Args:
        project_id: The GCP project ID.
        location: The location in which to create the channel.
        channel_id: The user-defined channel ID.
        primary_input_id: The user-defined primary input ID.
        backup_input_id: The user-defined backup input ID.
        output_uri: Uri of the channel output folder in a Cloud Storage bucket."""

    client = LivestreamServiceClient()
    parent = f"projects/{project_id}/locations/{location}"
    primary_input = (
        f"projects/{project_id}/locations/{location}/inputs/{primary_input_id}"
    )
    backup_input = (
        f"projects/{project_id}/locations/{location}/inputs/{backup_input_id}"
    )
    name = f"projects/{project_id}/locations/{location}/channels/{channel_id}"

    channel = live_stream_v1.types.Channel(
        name=name,
        input_attachments=[
            live_stream_v1.types.InputAttachment(
                key="my-primary-input",
                input=primary_input,
                automatic_failover=live_stream_v1.types.InputAttachment.AutomaticFailover(
                    input_keys=["my-backup-input"],
                ),
            ),
            live_stream_v1.types.InputAttachment(
                key="my-backup-input",
                input=backup_input,
            ),
        ],
        output=live_stream_v1.types.Channel.Output(
            uri=output_uri,
        ),
        elementary_streams=[
            live_stream_v1.types.ElementaryStream(
                key="es_video",
                video_stream=live_stream_v1.types.VideoStream(
                    h264=live_stream_v1.types.VideoStream.H264CodecSettings(
                        profile="high",
                        width_pixels=1280,
                        height_pixels=720,
                        bitrate_bps=3000000,
                        frame_rate=30,
                    ),
                ),
            ),
            live_stream_v1.types.ElementaryStream(
                key="es_audio",
                audio_stream=live_stream_v1.types.AudioStream(
                    codec="aac", channel_count=2, bitrate_bps=160000
                ),
            ),
        ],
        mux_streams=[
            live_stream_v1.types.MuxStream(
                key="mux_video",
                elementary_streams=["es_video"],
                segment_settings=live_stream_v1.types.SegmentSettings(
                    segment_duration=duration.Duration(
                        seconds=2,
                    ),
                ),
            ),
            live_stream_v1.types.MuxStream(
                key="mux_audio",
                elementary_streams=["es_audio"],
                segment_settings=live_stream_v1.types.SegmentSettings(
                    segment_duration=duration.Duration(
                        seconds=2,
                    ),
                ),
            ),
        ],
        manifests=[
            live_stream_v1.types.Manifest(
                file_name="manifest.m3u8",
                type_="HLS",
                mux_streams=["mux_video", "mux_audio"],
                max_segment_count=5,
            ),
        ],
    )
    operation = client.create_channel(
        parent=parent, channel=channel, channel_id=channel_id
    )
    response = operation.result(600)
    print(f"Channel: {response.name}")

    return response

Ruby

Antes de testar esta amostra, siga as instruções de configuração da Ruby no guia de início rápido da API Live Stream usando bibliotecas de cliente. Para mais informações, consulte a documentação de referência da API Ruby da API Live Stream.

require "google/cloud/video/live_stream"

##
# Create a channel with a failover backup input
#
# @param project_id [String] Your Google Cloud project (e.g. "my-project")
# @param location [String] The location (e.g. "us-central1")
# @param channel_id [String] Your channel name (e.g. "my-channel")
# @param primary_input_id [String] Your primary input name (e.g. "my-primary-input")
# @param backup_input_id [String] Your backup input name (e.g. "my-backup-input")
# @param output_uri [String] Uri of the channel output folder in a Cloud Storage
#     bucket. (e.g. "gs://my-bucket/my-output-folder/";)
#
def create_channel_with_backup_input project_id:, location:, channel_id:, primary_input_id:, backup_input_id:, output_uri:
  # Create a Live Stream client.
  client = Google::Cloud::Video::LiveStream.livestream_service

  # Build the resource name of the parent.
  parent = client.location_path project: project_id, location: location
  # Build the resource name of the inputs.
  primary_input_path = client.input_path project: project_id, location: location, input: primary_input_id
  backup_input_path = client.input_path project: project_id, location: location, input: backup_input_id

  # Set the channel fields.
  new_channel = {
    input_attachments: [
      {
        key: "my-primary-input",
        input: primary_input_path,
        automatic_failover: {
          input_keys: ["my-backup-input"]
        }
      },
      {
        key: "my-backup-input",
        input: backup_input_path
      }
    ],
    output: {
      uri: output_uri
    },
    elementary_streams: [
      {
        key: "es_video",
        video_stream: {
          h264: {
            profile: "high",
            bitrate_bps: 3_000_000,
            frame_rate: 30,
            height_pixels: 720,
            width_pixels: 1280
          }
        }
      },
      {
        key: "es_audio",
        audio_stream: {
          codec: "aac",
          channel_count: 2,
          bitrate_bps: 160_000
        }
      }
    ],
    mux_streams: [
      {
        key: "mux_video",
        elementary_streams: [
          "es_video"
        ],
        segment_settings: {
          segment_duration: {
            seconds: 2
          }
        }
      },
      {
        key: "mux_audio",
        elementary_streams: [
          "es_audio"
        ],
        segment_settings: {
          segment_duration: {
            seconds: 2
          }
        }
      }
    ],
    manifests: [
      {
        file_name: "main.m3u8",
        type: Google::Cloud::Video::LiveStream::V1::Manifest::ManifestType::HLS,
        mux_streams: [
          "mux_video", "mux_audio"
        ],
        max_segment_count: 5
      }
    ]
  }

  operation = client.create_channel parent: parent, channel: new_channel, channel_id: channel_id

  # The returned object is of type Gapic::Operation. You can use this
  # object to check the status of an operation, cancel it, or wait
  # for results. Here is how to block until completion:
  operation.wait_until_done!

  # Print the channel name.
  puts "Channel: #{operation.response.name}"
end

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