Egress examples | LiveKit Docs

Recording Room Composite as HLS

This example records a room composite layout as HLS segments to a S3 bucket.

note:

When live_playlist_name is provided, we'll generate a playlist containing only the last few segments. This can be useful to live-stream the recording via HLS.

{
  "room_name": "my-room",
  "layout": "grid",
  "preset": "H264_720P_30",
  "custom_base_url": "https://my-custom-template.com",
  "audio_only": false,
  "segment_outputs": [
    {
      "filename_prefix": "path/to/my-output",
      "playlist_name": "my-output.m3u8",
      "live_playlist_name": "my-output-live.m3u8",
      "segment_duration": 2,
      "s3": {
        "access_key": "",
        "secret": "",
        "region": "",
        "bucket": "my-bucket",
        "force_path_style": true
      }
    }
  ]
}

lk egress start --type room-composite egress.json

Recording Web In Portrait

This example records a web page in portrait mode to Google Cloud Storage and streaming to RTMP.

Portrait orientation can be specified by either setting a preset or advanced options. Egress will resize the Chrome compositor to your specified resolution. However, keep in mind:

Chrome has a minimum browser width limit of 500px.
Your application should maintain a portrait layout, even when the browser reports a width larger than typical mobile phones. (e.g., 720px width or higher).

{
  "url": "https://my-page.com",
  "preset": "PORTRAIT_H264_720P_30",
  "audio_only": false,
  "file_outputs": [
    {
      "filepath": "my-test-file.mp4",
      "gcp": {
        "credentials": "{\"type\": \"service_account\", ...}",
        "bucket": "my-bucket"
      }
    }
  ],
  "rtmp_outputs": [
    {
      "protocol": "RTMP",
      "urls": ["rtmps://my-rtmp-server.com/live/stream-key"]
    }
  ]
}

lk egress start --type web egress.json

SRT Streaming With Thumbnails

This examples shows streaming a Participant Egress to a SRT server, and generating thumbnails every 5 seconds. Thumbnails are stored in Azure.

{
  "room_name": "my-room",
  "identity": "participant-to-record",
  "screen_share": false,
  "advanced": {
    "width": 1280,
    "height": 720,
    "framerate": 30,
    "audioCodec": "AAC",
    "audioBitrate": 128,
    "videoCodec": "H264_HIGH",
    "videoBitrate": 5000,
    "keyFrameInterval": 2
  },
  "stream_outputs": [
    {
      "protocol": "SRT",
      "urls": ["srt://my-srt-server.com:9999"]
    }
  ],
  "image_outputs": [
    {
      "capture_interval": 5,
      "width": 1280,
      "height": 720,
      "filename_prefix": "{room_name}/{publisher_identity}",
      "filename_suffix": "IMAGE_SUFFIX_TIMESTAMP",
      "disable_manifest": true,
      "azure": {
        "account_name": "my-account",
        "account_key": "my-key",
        "container_name": "my-container"
      }
    }
  ]
}

lk egress start --type participant egress.json

Adding RTMP To Track Composite Egress

This example demonstrates a TrackComposite Egress that starts by saving to HLS, with RTMP output added later.

{
  "room_name": "my-room",
  "audio_track_id": "TR_AUDIO_ID",
  "video_track_id": "TR_VIDEO_ID",
  "stream_outputs": [
    {
      "protocol": "RTMP",
      "urls": []
    }
  ],
  "segment_outputs": [
    {
      "filename_prefix": "path/to/my-output",
      "playlist_name": "my-output.m3u8",
      "segment_duration": 2,
      "s3": {
        "access_key": "",
        "secret": "",
        "region": "",
        "bucket": "my-bucket"
      }
    }
  ]
}

lk egress start --type track-composite egress.json

# later, to add a RTMP output
lk egress update-stream --id <egress-id> --add-urls rtmp://new-server.com/live/stream-key

# to remove RTMP output
lk egress update-stream --id <egress-id> --remove-urls rtmp://new-server.com/live/stream-key

Exporting Individual Tracks Without Transcode

This example exports video tracks to Azure Blob Storage without transcoding. Note: video and audio tracks must be exported separately using Track Egress.

{
  "room_name": "my-room",
  "track_id": "TR_TRACK_ID",
  "filepath": "{room_name}/{track_id}",
  "azure": {
    "account_name": "my-account",
    "account_key": "my-key",
    "container_name": "my-container"
  }
}

lk egress start --type track egress.json