Configure subtitles

This page explains how to configure subtitles in Web Video Text Tracks format (WebVTT) for a live stream. Subtitles are generated from cea608 or cea708 captions in the input stream.

Subtitles are supported for HLS and DASH live streams.

Before you begin

This page assumes that you have completed the steps in the Before you beginsection of the Quickstart for an HLS live stream or the Quickstart for an MPEG-DASH live stream .

Create the input endpoint

To create the input endpoint, use the projects.locations.inputs.create method.

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location in which to create the input endpoint; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
INPUT_ID : a user-defined identifier for the new input endpoint to create (to which you send your input stream). This value must be 1-63 characters, begin and end with [a-z0-9] , and can contain dashes (-) between characters. For example, my-input .

Request JSON body:

{
  "type": "RTMP_PUSH"
}

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Note: The following command assumes that you have logged in to the gcloud CLI with your user account by running gcloud init or gcloud auth login , or by using Cloud Shell , which automatically logs you into the gcloud CLI . You can check the currently active account by running gcloud auth list .

Save the request body in a file named request.json . Run the following command in the terminal to create or overwrite this file in the current directory:

cat > request.json << 'EOF'
{
  "type": "RTMP_PUSH"
}
EOF

Then execute the following command to send your REST request:

curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json; charset=utf-8" \
-d @request.json \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs?inputId= INPUT_ID 
"

PowerShell (Windows)

Note: The following command assumes that you have logged in to the gcloud CLI with your user account by running gcloud init or gcloud auth login . You can check the currently active account by running gcloud auth list .

Save the request body in a file named request.json . Run the following command in the terminal to create or overwrite this file in the current directory:

@'
{
  "type": "RTMP_PUSH"
}
'@  | Out-File -FilePath request.json -Encoding utf8

Then execute the following command to send your REST request:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method POST `
-Headers $headers `
-ContentType: "application/json; charset=utf-8" `
-InFile request.json `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs?inputId= INPUT_ID 
" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.OperationMetadata",
    "createTime": CREATE_TIME 
,
    "target": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
",
    "verb": "create",
    "requestedCancellation": false,
    "apiVersion": "v1"
  },
  "done": false
}

Copy the returned OPERATION_ID to use in the next section.

Check for the result

Use the projects.locations.operations.get method to check if the input endpoint has been created. If the response contains "done: false" , repeat the command until the response contains "done: true" . Creating the first input endpoint in a region may take up to 10 minutes.

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location where your input endpoint is located; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
OPERATION_ID : the identifier for the operation

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Execute the following command:

curl -X GET \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
"

PowerShell (Windows)

Execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method GET `
-Headers $headers `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.OperationMetadata",
    "createTime": CREATE_TIME 
,
    "endTime": END_TIME 
,
    "target": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
",
    "verb": "create",
    "requestedCancellation": false,
    "apiVersion": "v1"
  },
  "done": true,
  "response": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.Input",
    "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
",
    "createTime": CREATE_TIME 
,
    "updateTime": UPDATE_TIME 
,
    "type": "RTMP_PUSH",
    "uri": INPUT_STREAM_URI 
, # For example, "rtmp://1.2.3.4/live/b8ebdd94-c8d9-4d88-a16e-b963c43a953b",
    "tier": "HD"
  }
}

Find the uri field and copy the returned INPUT_STREAM_URI to use later in the Send the input stream section.

Create the channel

To create the channel, use the projects.locations.channels.create method.

Note the following in the channel configuration:

One ElementaryStream , a TextStream , is used for the subtitles.

  { 
  
 "key" 
 : 
  
 "webvtt-english" 
 , 
  
 "textStream" 
 : 
  
 { 
  
 "codec" 
 : 
  
 "webvtt" 
 , 
  
 "display_name" 
 : 
  
 "English" 
 , 
  
 "language_code" 
 : 
  
 "en-US" 
 , 
  
 "mapping" 
 : 
  
 [ 
  
 { 
  
 "input_cea_channel" 
 : 
  
 "CC1" 
  
 } 
  
 ] 
  
 } 
 }

The TextStream codec field is set to webvtt .
The TextStream mapping field maps input streams to text tracks. In this example, input_cea_channel is mapped to input channel CC1 for English subtitles.

The elementary stream is used to create a MuxStream with key vtt-english .

  { 
  
 "key" 
 : 
  
 "vtt_english" 
 , 
  
 "container" 
 : 
  
 "vtt" 
 , 
  
 "elementaryStreams" 
 : 
  
 [ 
  
 "webvtt-english" 
  
 ], 
  
 "segmentSettings" 
 : 
  
 { 
  
 "segmentDuration" 
 : 
  
 "2s" 
  
 } 
 }

This mux stream is then referenced in both HLS and DASH manifests .

  { 
  
 "fileName" 
 : 
  
 "main.m3u8" 
 , 
  
 "type" 
 : 
  
 "HLS" 
 , 
  
 "muxStreams" 
 : 
  
 [ 
  
 "mux_video_ts" 
 , 
  
 "vtt_english" 
  
 ], 
  
 "maxSegmentCount" 
 : 
  
 5 
 }

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location in which to create the channel; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
CHANNEL_ID : a user-defined identifier for the channel to create; this value must be 1-63 characters, begin and end with [a-z0-9] , and can contain dashes (-) between characters
INPUT_ID : the user-defined identifier for the input endpoint
BUCKET_NAME : the name of the Cloud Storage bucket you created to hold the live stream manifest and segment files

Request JSON body:

{
  "inputAttachments": [
    {
      "key": "my-input",
      "input": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
"
    }
  ],
  "output": {
    "uri": "gs:// BUCKET_NAME 
"
  },
  "elementaryStreams": [
    {
      "key": "es_video",
      "videoStream": {
        "h264": {
          "profile": "high",
          "widthPixels": 1280,
          "heightPixels": 720,
          "bitrateBps": 3000000,
          "frameRate": 30
        }
      }
    },
    {
      "key": "es_audio",
      "audioStream": {
        "codec": "aac",
        "channelCount": 2,
        "bitrateBps": 160000
      }
    }, {
      "key": "webvtt-english",
      "textStream": {
        "codec": "webvtt",
        "display_name": "English",
        "language_code": "en-US",
        "mapping": [
          {
            "input_cea_channel": "CC1"
          }
        ]
      }
    }],
  "muxStreams": [
    {
      "key": "mux_video_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_video"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_audio_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_video_ts",
      "container": "ts",
      "elementaryStreams": [
        "es_video",
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    }, {
      "key": "vtt_english",
      "container": "vtt",
      "elementaryStreams": [
        "webvtt-english"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    }],
  "manifests": [
    {
      "key": "manifest_dash",
      "fileName": "main.mpd",
      "type": "DASH",
      "muxStreams": [
        "mux_video_fmp4",
        "mux_audio_fmp4", "vtt_english"],
      "maxSegmentCount": 5
    },
    {
      "key": "manifest_hls",
      "fileName": "main.m3u8",
      "type": "HLS",
      "muxStreams": [
        "mux_video_ts", "vtt_english"],
      "maxSegmentCount": 5
    }
  ]
}

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Save the request body in a file named request.json . Run the following command in the terminal to create or overwrite this file in the current directory:

cat > request.json << 'EOF'
{
  "inputAttachments": [
    {
      "key": "my-input",
      "input": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
"
    }
  ],
  "output": {
    "uri": "gs:// BUCKET_NAME 
"
  },
  "elementaryStreams": [
    {
      "key": "es_video",
      "videoStream": {
        "h264": {
          "profile": "high",
          "widthPixels": 1280,
          "heightPixels": 720,
          "bitrateBps": 3000000,
          "frameRate": 30
        }
      }
    },
    {
      "key": "es_audio",
      "audioStream": {
        "codec": "aac",
        "channelCount": 2,
        "bitrateBps": 160000
      }
    }, {
      "key": "webvtt-english",
      "textStream": {
        "codec": "webvtt",
        "display_name": "English",
        "language_code": "en-US",
        "mapping": [
          {
            "input_cea_channel": "CC1"
          }
        ]
      }
    }],
  "muxStreams": [
    {
      "key": "mux_video_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_video"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_audio_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_video_ts",
      "container": "ts",
      "elementaryStreams": [
        "es_video",
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    }, {
      "key": "vtt_english",
      "container": "vtt",
      "elementaryStreams": [
        "webvtt-english"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    }],
  "manifests": [
    {
      "key": "manifest_dash",
      "fileName": "main.mpd",
      "type": "DASH",
      "muxStreams": [
        "mux_video_fmp4",
        "mux_audio_fmp4", "vtt_english"],
      "maxSegmentCount": 5
    },
    {
      "key": "manifest_hls",
      "fileName": "main.m3u8",
      "type": "HLS",
      "muxStreams": [
        "mux_video_ts", "vtt_english"],
      "maxSegmentCount": 5
    }
  ]
}
EOF

Then execute the following command to send your REST request:

curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json; charset=utf-8" \
-d @request.json \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels?channelId= CHANNEL_ID 
"

PowerShell (Windows)

Save the request body in a file named request.json . Run the following command in the terminal to create or overwrite this file in the current directory:

@'
{
  "inputAttachments": [
    {
      "key": "my-input",
      "input": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
"
    }
  ],
  "output": {
    "uri": "gs:// BUCKET_NAME 
"
  },
  "elementaryStreams": [
    {
      "key": "es_video",
      "videoStream": {
        "h264": {
          "profile": "high",
          "widthPixels": 1280,
          "heightPixels": 720,
          "bitrateBps": 3000000,
          "frameRate": 30
        }
      }
    },
    {
      "key": "es_audio",
      "audioStream": {
        "codec": "aac",
        "channelCount": 2,
        "bitrateBps": 160000
      }
    }, {
      "key": "webvtt-english",
      "textStream": {
        "codec": "webvtt",
        "display_name": "English",
        "language_code": "en-US",
        "mapping": [
          {
            "input_cea_channel": "CC1"
          }
        ]
      }
    }],
  "muxStreams": [
    {
      "key": "mux_video_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_video"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_audio_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_video_ts",
      "container": "ts",
      "elementaryStreams": [
        "es_video",
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    }, {
      "key": "vtt_english",
      "container": "vtt",
      "elementaryStreams": [
        "webvtt-english"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    }],
  "manifests": [
    {
      "key": "manifest_dash",
      "fileName": "main.mpd",
      "type": "DASH",
      "muxStreams": [
        "mux_video_fmp4",
        "mux_audio_fmp4", "vtt_english"],
      "maxSegmentCount": 5
    },
    {
      "key": "manifest_hls",
      "fileName": "main.m3u8",
      "type": "HLS",
      "muxStreams": [
        "mux_video_ts", "vtt_english"],
      "maxSegmentCount": 5
    }
  ]
}
'@  | Out-File -FilePath request.json -Encoding utf8

Then execute the following command to send your REST request:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method POST `
-Headers $headers `
-ContentType: "application/json; charset=utf-8" `
-InFile request.json `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels?channelId= CHANNEL_ID 
" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.OperationMetadata",
    "createTime": CREATE_TIME 
,
    "target": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
",
    "verb": "create",
    "requestedCancellation": false,
    "apiVersion": "v1"
  },
  "done": false
}

Get the channel

You can check for the result of the channel creation operation using the new operation ID.

After the channel has been created, use the projects.locations.channels.get method to query the channel state.

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location where your channel is located; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
CHANNEL_ID : a user-defined identifier for the channel

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Execute the following command:

curl -X GET \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
"

PowerShell (Windows)

Execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method GET `
-Headers $headers `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
",
  "createTime": CREATE_TIME 
,
  "updateTime": UPDATE_TIME 
,
  "inputAttachments": [
    {
      "key": " INPUT_ID 
",
      "input": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
"
    }
  ],
  "activeInput": " INPUT_ID 
",
  "output": {
    "uri": "gs:// BUCKET_NAME 
"
  },
  "elementaryStreams": [
    {
      "key": "es_video",
      "videoStream": {
        "h264": {
          "profile": "high",
          "widthPixels": 1280,
          "heightPixels": 720,
          "bitrateBps": 3000000,
          "frameRate": 30
        }
      }
    },
    {
      "key": "es_audio",
      "audioStream": {
        "codec": "aac",
        "channelCount": 2,
        "bitrateBps": 160000
      }
    },
    {
      "key": "webvtt-english",
      "textStream": {
        "codec": "webvtt",
        "display_name": "English",
        "language_code": "en-US",
        "mapping": [
          {
            "input_cea_channel": "CC1"
          }
        ]
      }
    }
  ],
  "muxStreams": [
    {
      "key": "mux_video_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_video"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_audio_fmp4",
      "container": "fmp4",
      "elementaryStreams": [
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "mux_video_ts",
      "container": "ts",
      "elementaryStreams": [
        "es_video",
        "es_audio"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    },
    {
      "key": "vtt_english",
      "container": "vtt",
      "elementaryStreams": [
        "webvtt-english"
      ],
      "segmentSettings": {
        "segmentDuration": "2s"
      }
    }
  ],
  "manifests": [
    {
      "key": "manifest_dash",
      "fileName": "main.mpd",
      "type": "DASH",
      "muxStreams": [
        "mux_video_fmp4",
        "mux_audio_fmp4",
        "vtt_english"
      ],
      "maxSegmentCount": 5
    },
    {
      "key": "manifest_hls",
      "fileName": "main.m3u8",
      "type": "HLS",
      "muxStreams": [
        "mux_video_ts",
        "vtt_english"
      ],
      "maxSegmentCount": 5
    }
  ],
  "streamingState": "STOPPED"
}

The full response contains the following field:

 {
  ...
  "streamingState": "STOPPED"
  ...
}

This response indicates that you can now start the channel.

Start the channel

Use the projects.locations.channels.start method to start the channel. A channel must be started before it can accept input streams or generate an output stream.

Starting the first channel in a region takes about 10 minutes.

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location where your channel is located; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
CHANNEL_ID : a user-defined identifier for the channel

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Execute the following command:

curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json; charset=utf-8" \
-d "" \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
:start"

PowerShell (Windows)

Execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method POST `
-Headers $headers `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
:start" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.OperationMetadata",
    "createTime": CREATE_TIME 
,
    "target": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
",
    "verb": "start",
    "requestedCancellation": false,
    "apiVersion": "v1"
  },
  "done": false
}

To determine if the channel has started, get the channel information as done previously. The response should contain the following:

 {
  ...
  "streamingState": "AWAITING_INPUT"
  ...
}

Send the input stream

Now that the channel is ready, send an input stream to the input endpoint to generate the live stream. You can download an MP4 (or other TEST_VOD_FILE ) with captions and use ffmpeg to send it to the input endpoint.

Open a new terminal window. Run the following command, using the INPUT_STREAM_URI from the Check for the result section:

 ffmpeg  
-re  
-stream_loop  
-1  
-i  
 " TEST_VOD_FILE 
" 
  
 \ 
  
-c:v  
copy  
-c:a  
aac  
-strict  
 2 
  
-f  
 "flv" 
  
 " INPUT_STREAM_URI 
"

Play the generated live stream

To play the generated media file in Shaka Player , complete the following steps:

Make the Cloud Storage bucket you created publicly readable .

To enable cross-origin resource sharing (CORS) on a Cloud Storage bucket , do the following:

Create a JSON file that contains the following:

[
  {
    "origin": ["https://shaka-player-demo.appspot.com/"],
    "responseHeader": ["Content-Type", "Range"],
    "method": ["GET", "HEAD"],
    "maxAgeSeconds": 3600
  }
]

Run the following command after replacing JSON_FILE_NAME with the name of the JSON file you created in the previous step:
```
gcloud storage buckets update gs:// BUCKET_NAME 
--cors-file= JSON_FILE_NAME 
.json
```

In the Cloud Storage bucket, find the generated main.m3u8 file. Click Copy URLin the file's Public accesscolumn.
Navigate to Shaka Player , an online live stream player.
Click Custom Contentin the top navigation bar.
Click the +button.
Paste the public URL of the file into the Manifest URLbox.
Type a name in the Namebox.
Click Save.
Click Play.

You should see the live stream play. You may need to enable captions in the Shaka Player UI.

Clean up

Stop the channel

Use the projects.locations.channels.stop method to stop the channel. You must stop the channel before you can delete it.

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location where your channel is located; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
CHANNEL_ID : a user-defined identifier for the channel

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Execute the following command:

curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json; charset=utf-8" \
-d "" \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
:stop"

PowerShell (Windows)

Execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method POST `
-Headers $headers `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
:stop" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.OperationMetadata",
    "createTime": CREATE_TIME 
,
    "target": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
",
    "verb": "stop",
    "requestedCancellation": false,
    "apiVersion": "v1"
  },
  "done": false
}

Stop the input stream

If you used ffmpeg to send the input stream, the connection is automatically broken after you stop the channel.

Delete the channel

Use the projects.locations.channels.delete method to delete the channel. You must delete the channel before you can delete the input endpoint that is used by the channel.

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location where your channel is located; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
CHANNEL_ID : a user-defined identifier for the channel

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Execute the following command:

curl -X DELETE \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
"

PowerShell (Windows)

Execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method DELETE `
-Headers $headers `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.OperationMetadata",
    "createTime": CREATE_TIME 
,
    "target": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/channels/ CHANNEL_ID 
",
    "verb": "delete",
    "requestedCancellation": false,
    "apiVersion": "v1"
  },
  "done": false
}

Delete the input endpoint

Use the projects.locations.inputs.delete method to delete the input endpoint.

Before using any of the request data, make the following replacements:

PROJECT_NUMBER : your Google Cloud project number; this is located in the Project number field on the IAM Settings page
LOCATION : the location where your input endpoint is located; use one of the supported regions
Show locations
- us-central1
- us-east1
- us-east4
- us-west1
- us-west2
- northamerica-northeast1
- southamerica-east1
- asia-east1
- asia-east2
- asia-south1
- asia-northeast1
- asia-southeast1
- australia-southeast1
- europe-north1
- europe-west1
- europe-west2
- europe-west3
- europe-west4
INPUT_ID : the user-defined identifier for the input endpoint

To send your request, expand one of these options:

curl (Linux, macOS, or Cloud Shell)

Execute the following command:

curl -X DELETE \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
"https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
"

PowerShell (Windows)

Execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method DELETE `
-Headers $headers `
-Uri "https://livestream.googleapis.com/v1/projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "name": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/operations/ OPERATION_ID 
",
  "metadata": {
    "@type": "type.googleapis.com/google.cloud.video.livestream.v1.OperationMetadata",
    "createTime": CREATE_TIME 
,
    "target": "projects/ PROJECT_NUMBER 
/locations/ LOCATION 
/inputs/ INPUT_ID 
",
    "verb": "delete",
    "requestedCancellation": false,
    "apiVersion": "v1"
  },
  "done": false
}

Delete the Cloud Storage bucket

In the Google Cloud console, go to the Cloud Storage Browser page.

Go to the Cloud Storage Browser page
Select the checkbox next to the bucket that you created.
Click Delete.
In the dialog window that appears, click Deleteto permanently delete the bucket and its contents.

Configure subtitles Stay organized with collections Save and categorize content based on your preferences.

Before you begin

Create the input endpoint

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Check for the result

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Create the channel

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Get the channel

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Start the channel

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Send the input stream

Play the generated live stream

Clean up

Stop the channel

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Stop the input stream

Delete the channel

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Delete the input endpoint

curl (Linux, macOS, or Cloud Shell)

PowerShell (Windows)

Delete the Cloud Storage bucket

Configure subtitles