Metadata Events

This API call allows developers to listen for metadata embedded in the media file (e.g. dimensions or ID3 timed metadata in HLS streams).

.on('meta')

Triggered when playback enters the time range where new metadata becomes active. Metadata can be returned in one of the following formats listed below.

Date range metadata

Fires when playback enters the section of an HLS stream tagged with #EXT-X-DATERANGE

{
    "type": "meta",
    "metadataType": "date-range",
    "metadataTime": 10,
    "metadata": {
        "tag": "EXT-X-DATERANGE",
        "content": "ID=309726842,PLANNED_DURATION=30.000,START_DATE=2018-10-30 20:45:29.216158+00:00,SCTE35-OUT=TBD",
        "attributes": [{
                "name": "ID",
                "value": "309726842"
            },
            {
                "name": "PLANNED_DURATION",
                "value": 30
            },
            {
                "name": "START_DATE",
                "value": "2018-10-30 20:45:29.216158+00:00"
            },
            {
                "name": "SCTE35-OUT",
                "value": "TBD"
            }
        ],
        "start": 10,
        "end": 40,
        "startDate": "2018-10-30 20:45:29.216158+00:00",
        "endDate": null,
        "duration": 30.0
    }
}

Value	Description
metadata `object`	Object containing all of the information relevant to the HLS `#EXT-X-DATERANGE` tag See: meta data range `metadata` object
metadataTime `number`	Start time, in seconds, of the metadata cue
metadataType `string`	Subcategory of `meta` event This is always `date-range` for this event subcategory.
type `string`	Category of player event This is always `meta` for this event.

meta data range metadata

Value	Description
attributes `array`	`EXT-X-DATERANGE:<attribute-list>`
content `string`	Content following the HLS tag
duration `number`	Duration of the `EXT-X-DATERANGE`
end `number`	End time of the cue in seconds, relative to `currentTime` of stream
endDate `string`	`EXT-X-DATERANGE` end date in UTC
start `number`	Start time of the cue in seconds, relative to `currentTime` of stream
startDate `string`	`EXT-X-DATERANGE` start date in UTC
tag `string`	Name of the HLS manifest tag This is always `EXT-X-DATERANGE` for this event.

EMSG metadata

Fires when the meta event is happening in conjunction with meta start time

{
    "type": "meta",
    "metadataType": "emsg",
    "metadataTime": 1594650340,
    "metadata": {
        "metadataType": "emsg",
        "id": 159465034,
        "schemeIdUri": "urn:scte:scte35:2013:xml",
        "timescale": 90000,
        "presentationTimeOffset": 900000,
        "duration": 900000,
        "start": 1594650340,
        "end": 1594650350,
        "messageData": {
            "0": 60,
            "1": 83,
            "2": 112,
            "3": 108,
            ... 
            "386": 62
        }
    }
}

Value	Description
metadata `object`	Object containing all of the information relevant to the HLS `#EXT-X-DATERANGE` tag See: meta emsg `metadata` object
metadataTime `number`	Start time, in seconds, of the metadata cue
metadataType `string`	Subcategory of `meta` event This is always `emsg` for this event subcategory.
type `string`	Category of player event This is always `meta` for this event.

meta emsg metadata

Value	Description
duration `number`	Duration of the `EXT-X-DATERANGE`
end `number`	End time of the cue in seconds, relative to `currentTime` of stream
id `number`	Field identifying this instance of the message
messageData `array`	Body of the message
metadataType `string`	Subcategory of `meta` event This is always `emsg` for this event subcategory.
presentationTimeOffset `number`	Offset that the event starts, relative to the start of the segment this is contained in (in units of timescale)
start `number`	Start time of the cue in seconds, relative to `currentTime` of stream
schemeIdUri `string`	Identifies the message scheme
timescale `number`	Provides the timescale, in ticks per second

ID3 metadata

Fires when playback enters the section of an HLS stream containing ID3 tags

{
  "type": "meta",
  "metadataType": "id3",
  "metadataTime": 0,
  "metadata": {
    ...          
  }
}

Value	Description
metadata `object`	Object containing all of the information relevant to the HLS ID3 tag
metadataTime `number`	Start time, in seconds, of the metadata cue
metadataType `string`	Subcategory of `meta` event This is always `id3` for this event subcategory.
type `string`	Category of player event This is always `meta` for this event.

Media metadata

Fires when the initial metadata of a video has loaded

{
  "type": "meta",
  "metadataType": "media",
  "duration": 60,
  "height": 1280,
  "width": 720,
  "seekRange": {
    "start": 0,
    "end": 60
  }
}

Value	Description
duration `number`	Length of the media asset
height `number`	Height dimension of the media asset
metadataType `string`	Subcategory of `meta` event This is always `media` for this event subcategory.
seekRange `object`	Time range representing how much video is available to buffer in live stream or for seeking in DVR See: meta media `seekRange` object
type `string`	Category of player event This is always `meta` for this event.
width `number`	Width dimension of the media asset

meta media seekRange

Value	Description
end `number`	End time of the time range in seconds, relative to `currentTime` of stream
start `number`	Start time of the time range in seconds, relative to `currentTime` of stream

Program-date-time metadata

Fires when playback enters the section of an HLS stream tagged with #EXT-X-PROGRAM-DATE-TIME

{
  "type": "meta",
  "metadataType": "program-date-time",
  "programDateTime": "2018-09-28T16:50:46Z",
  "metadataTime": 19.9,
  "metadata": {
    "programDateTime": "2018-09-28T16:50:46Z",
    "start": 19.9,
    "end": 29.9
  }
}

Value	Description	Type
`metadata`	Object containing all of the information relevant to the HLS `#EXT-X-PROGRAM-DATE-TIME` tag `end`: (Number) End time of the cue in seconds, relative to `currentTime` of stream `programDateTime`: (String) Date and time of the program metadata in UTC `start`: (Number) Start time of the cue in seconds, relative to `currentTime` of stream	Object
`metadataTime`	Start time, in seconds, of the metadata cue	Number
`metadataType`	Subcategory of `meta` event This is always `program-date-time` for this event subcategory.	String
`programDateTime`	Date and time of the program metadata in UTC	String
`type`	Category of player event This is always `meta` for this event.	String

SCTE-35 metadata

Fires when playback enters a section of an HLS stream tagged with #EXT-X-CUE-OUT, #EXT-X-CUE-IN

{
  "type": "meta",
  "metadataType": "scte-35",
  "metadataTime": 10,
  "metadata": {
    "tag": "EXT-X-CUE-OUT",
    "content": "...",
    "start": 10,
    "end": 40
  }
}

Value	Description	Type
`metadata`	Object containing all of the information relevant to the HLS `#EXT-X-CUE-OUT`, `#EXT-X-CUE-IN` tags `content`: (String) Content following the HLS manifest tag `end`: (Number) End time of the cue in seconds, relative to `currentTime` of stream `start`: (Number) Start time of the cue in seconds, relative to `currentTime` of stream `tag`: (String) Name of the HLS manifest tag This is always `EXT-X-CUE-OUT` or `EXT-X-CUE-IN` for this event.	Object
`metadataTime`	Start time, in seconds, of the metadata cue	Number
`metadataType`	Subcategory of `meta` event This is always `scte-35` for this event subcategory.	String
`type`	Category of player event This is always `meta` for this event.	String

Unknown metadata

Indicates that a meta event from a third-party media provider or legacy Flash has fired

{
  "type": "meta",
  "metadataType": "unknown",
  ...
}

Value	Description	Type
`metadataType`	Subcategory of `meta` event This is always `unknown` for this event subcategory.	String
`type`	Category of player event This is always `meta` for this event.	String

.on('metadataCueParsed')

Triggered once the metadata cue point is buffered

Date range metadata

Fires when the player buffers a section of an HLS stream tagged with #EXT-X-DATERANGE

{
  "type": "metadataCueParsed",
  "metadataType": "date-range",
  "metadataTime": 10,
  "metadata": {
    "tag": "EXT-X-DATERANGE",
    "content": "ID=309726842,PLANNED_DURATION=30.000,START_DATE=2018-10-30 20:45:29.216158+00:00,SCTE35-OUT=TBD",
    "attributes": [
      {
        "name": "ID",
        "value": "309726842"
      },
      {
        "name": "PLANNED_DURATION",
        "value": 30
      },
      {
        "name": "START_DATE",
        "value": "2018-10-30 20:45:29.216158+00:00"
      },
      {
        "name": "SCTE35-OUT",
        "value": "TBD"
      }
    ],
    "start": 10,
    "end": 40,
    "startDate": "2018-10-30 20:45:29.216158+00:00",
    "endDate": null,
    "duration": 30.0
  }     
}

Value	Description	Type
`metadata`	Object containing all of the information relevant to the HLS `#EXT-X-DATERANGE` tag `attributes`: (Array) `EXT-X-DATERANGE:<attribute-list>` `content`: (String) Content following the HLS tag `duration`: (Number) Duration of the `EXT-X-DATERANGE` `end`: (Number) End time of the cue, in seconds, relative to `currentTime` of stream `endDate`: (String) `EXT-X-DATERANGE` end date in UTC `start`: (Number) Start time of the cue, in seconds, relative to `currentTime` of stream `startDate`: (String) `EXT-X-DATERANGE` start date in UTC `tag`: (String) Name of the HLS manifest tag This is always `EXT-X-DATERANGE` for this event.	Object
`metadataTime`	Start time, in seconds, of the metadata cue	Number
`metadataType`	Subcategory of `meta` event This is always `date-range` for this event subcategory.	String
`type`	Category of player event This is always `metadataCueParsed` for this event.	String

EMSG metadata (metadataCueParsed)

{
    "type": "metadataCueParsed",
    "metadataType": "emsg",
    "metadataTime": 1594650340,
    "metadata": {
        "metadataType": "emsg",
        "id": 159465034,
        "schemeIdUri": "urn:scte:scte35:2013:xml",
        "timescale": 90000,
        "presentationTimeOffset": 900000,
        "duration": 900000,
        "start": 1594650340,
        "end": 1594650350,
        "messageData": {
            "0": 60,
            "1": 83,
            "2": 112,
            "3": 108,
            ... 
            "386": 62
        }
    }
}

Value	Description
metadata `object`	Object containing all of the information relevant to the HLS `#EXT-X-DATERANGE` tag See: metadata object
metadataTime `number`	Start time, in seconds, of the metadata cue
metadataType `string`	Subcategory of `meta` event This is always `emsg` for this event subcategory.
type `string`	Category of player event This is always `metadataCueParsed` for this event.

metadataCueParsed emsg metadata object

Value	Description
duration `number`	Duration of the `EXT-X-DATERANGE`
end `number`	End time of the cue in seconds, relative to `currentTime` of stream
id `number`	Field identifying this instance of the message
messageData `array`	Body of the message
metadataType `string`	Subcategory of `meta` event This is always `emsg` for this event subcategory.
presentationTimeOffset `number`	Offset that the event starts, relative to the start of the segment this is contained in (in units of timescale)
start `number`	Start time of the cue in seconds, relative to `currentTime` of stream
schemeIdUri `string`	Identifies the message scheme
timescale `number`	Provides the timescale, in ticks per second

ID3 metadata

Fires when playback buffers a section of an HLS stream containing ID3 tags

{
  "type": "metadataCueParsed",
  "metadataType": "id3",
  "metadataTime": 0,
  "metadata": {
    ...          
  }
}

Value	Description	Type
`metadata`	Object containing all of the information relevant to the HLS ID3 tag	Object
`metadataTime`	Start time, in seconds, of the metadata cue	Number
`metadataType`	Subcategory of `meta` event This is always `id3` for this event subcategory.	String
`type`	Category of player event This is always `metadataCueParsed` for this event.	String

Program-date-time metadata

Fires when the player buffers a section of an HLS stream tagged with #EXT-X-PROGRAM-DATE-TIME

{
  "type": "metadataCueParsed",
  "metadataType": "program-date-time",
  "programDateTime": "2018-09-28T16:50:46Z",
  "metadataTime": 19.9,
  "metadata": {
    "programDateTime": "2018-09-28T16:50:46Z",
    "start": 19.9,
    "end": 29.9
  }
}

Value	Description	Type
`metadata`	Object containing all of the information relevant to the HLS `#EXT-X-PROGRAM-DATE-TIME` tag `end`: (Number) End time of the cue, in seconds, relative to `currentTime` of stream `programDateTime`: (String) Date and time of the program metadata in UTC `start`: (Number) Start time of the cue, in seconds, relative to `currentTime` of stream	Object
`metadataTime`	Start time, in seconds, of the metadata cue	Number
`metadataType`	Subcategory of `meta` event This is always `program-date-time` for this event subcategory.	String
`programDateTime`	Date and time of the program metadata in UTC	String
`type`	Category of player event This is always `metadataCueParsed` for this event.	String

SCTE-35 metadata

Fires when the player buffers a section of an HLS stream tagged with #EXT-X-CUE-OUT, #EXT-X-CUE-IN

{
  "type": "metadataCueParsed",
  "metadataType": "scte-35",
  "metadataTime": 10,
  "metadata": {
    "tag": "EXT-X-CUE-OUT",
    "content": "...",
    "start": 10,
    "end": 40
  }
}

Value	Description	Type
`metadata`	Object containing all of the information relevant to the HLS `#EXT-X-CUE-OUT`, `#EXT-X-CUE-IN` tags `content`: (String) Content following the HLS manifest tag `end`: (Number) End time of the cue, in seconds, relative to `currentTime` of stream `start`: (Number) Start time of the cue, in seconds, relative to `currentTime` of stream `tag`: (String) Name of the HLS manifest tag This is always `EXT-X-CUE-OUT` or `EXT-X-CUE-IN` for this event.	Object
`metadataTime`	Start time, in seconds, of the metadata cue	Number
`metadataType`	Subcategory of `meta` event This is always `scte-35` for this event subcategory.	String
`type`	Category of player event This is always `metadataCueParsed` for this event.	String