Media Objects

Closed captions added to a video MediaObject

When you upload or record webcam video/audio to kaltura, it makes a Media Object

A MediaTrack object looks like:

{
  "id": 42,
  "user_id": 1,
  "media_object_id": 14,
  "kind": "subtitles",
  "locale": "es",
  "content": "1]\\n00:00:00,000 --> 00:00:01,251\nI'm spanish",
  "created_at": "Mon, 24 Feb 2020 16:04:02 EST -05:00",
  "updated_at": "Mon, 24 Feb 2020 16:59:05 EST -05:00",
  "webvtt_content": "WEBVTT\n\n1]\\n00:00:00.000 --> 00:00:01.251\nI'm spanish"
}

A MediaObject object looks like:

{
  // whether or not the current user can upload media_tracks (subtitles) to this Media Object
  "can_add_captions": true,
  "user_entered_title": "User Entered Title",
  "title": "filename-or-user-title-or-untitled",
  "media_id": "m-JYmy6TLsHkxcrhgYmqa7XW1HCH3wEYc",
  "media_type": "video",
  // an array of all the media_tracks uploaded to this Media Object
  "media_tracks": [{
    "kind": "captions",
    "created_at": "2012-09-27T16:46:50-06:00",
    "updated_at": "2012-09-27T16:46:50-06:00",
    "url": "https://<canvas>/media_objects/0_r949z9lk/media_tracks/1",
    "id": 1,
    "locale": "af"
  }, {
    "kind": "subtitles",
    "created_at": "2012-09-27T20:29:17-06:00",
    "updated_at": "2012-09-27T20:29:17-06:00",
    "url": "https://<canvas>/media_objects/0_r949z9lk/media_tracks/14",
    "id": 14,
    "locale": "cs"
  }],
  // an array of all the transcoded files (flavors) available for this Media Object
  "media_sources": [{
    "height": "240",
    "width": "336",
    "content_type": "video/mp4",
    "containerFormat": "isom",
    "url": "http://example.com/p/100/sp/10000/download/entry_id/0_r949z9lk/flavor/0_xdp3qrpc/ks/MjUxNjY4MjlhMTkxN2VmNTA0OGRkZjY2ODNjMjgxNTkwYWE3NGMyNHwxMDA7MTAwOzEzNDkyNzU5MDY7MDsxMzQ5MTg5NTA2LjUxOTk7O2Rvd25sb2FkOjBfcjk0OXo5bGs7/relocate/download.mp4",
    "bitrate": "382",
    "size": "204",
    "isOriginal": "0",
    "fileExt": "mp4"
  }, {
    "height": "252",
    "width": "336",
    "content_type": "video/x-flv",
    "containerFormat": "flash video",
    "url": "http://example.com/p/100/sp/10000/download/entry_id/0_r949z9lk/flavor/0_0f2x4odx/ks/NmY2M2Q2MDdhMjBlMzA2ZmRhMWZjZjAxNWUyOTg0MzA5MDI5NGE4ZXwxMDA7MTAwOzEzNDkyNzU5MDY7MDsxMzQ5MTg5NTA2LjI5MDM7O2Rvd25sb2FkOjBfcjk0OXo5bGs7/relocate/download.flv",
    "bitrate": "797",
    "size": "347",
    "isOriginal": "1",
    "fileExt": "flv"
  }]
}

List media tracks for a Media Object or Attachment

MediaTracksController#index

GET /api/v1/media_objects/:media_object_id/media_tracks

Scope: url:GET|/api/v1/media_objects/:media_object_id/media_tracks

GET /api/v1/media_attachments/:attachment_id/media_tracks

Scope: url:GET|/api/v1/media_attachments/:attachment_id/media_tracks

List the media tracks associated with a media object or attachment

Request Parameters:

Parameter	Type	Description
include[]	string	By default, index returns id, locale, kind, media_object_id, and user_id for each of the result MediaTracks. Use include[] to add additional fields. For example include[]=content Allowed values: content, webvtt_content, updated_at, created_at

Example Request:

curl https://<canvas>/api/v1/media_objects/<media_object_id>/media_tracks?include[]=content
    -H 'Authorization: Bearer <token>'

curl https://<canvas>/api/v1/media_attachments/<attachment_id>/media_tracks?include[]=content
    -H 'Authorization: Bearer <token>'

Returns a list ofMediaTrack objects.

Update Media Tracks

MediaTracksController#update

PUT /api/v1/media_objects/:media_object_id/media_tracks

Scope: url:PUT|/api/v1/media_objects/:media_object_id/media_tracks

PUT /api/v1/media_attachments/:attachment_id/media_tracks

Scope: url:PUT|/api/v1/media_attachments/:attachment_id/media_tracks

Replace the media tracks associated with a media object or attachment with the array of tracks provided in the body. Update will delete any existing tracks not listed, leave untouched any tracks with no content field, and update or create tracks with a content field.

Request Parameters:

Parameter	Type	Description
include[]	string	By default, an update returns id, locale, kind, media_object_id, and user_id for each of the result MediaTracks. Use include[] to add additional fields. For example include[]=content Allowed values: content, webvtt_content, updated_at, created_at

Example Request:

curl -X PUT https://<canvas>/api/v1/media_objects/<media_object_id>/media_tracks?include[]=content \
  -H 'Authorization: Bearer <token>'
  -d '[{"locale": "en"}, {"locale": "af","content": "1\r\n00:00:00,000 --> 00:00:01,251\r\nThis is the content\r\n"}]'

curl -X PUT https://<canvas>/api/v1/media_attachments/<attachment_id>/media_tracks?include[]=content \
  -H 'Authorization: Bearer <token>'
  -d '[{"locale": "en"}, {"locale": "af","content": "1\r\n00:00:00,000 --> 00:00:01,251\r\nThis is the content\r\n"}]'

Returns a list ofMediaTrack objects.

List Media Objects

MediaObjectsController#index

GET /api/v1/media_objects

Scope: url:GET|/api/v1/media_objects

GET /api/v1/courses/:course_id/media_objects

Scope: url:GET|/api/v1/courses/:course_id/media_objects

GET /api/v1/groups/:group_id/media_objects

Scope: url:GET|/api/v1/groups/:group_id/media_objects

GET /api/v1/media_attachments

Scope: url:GET|/api/v1/media_attachments

GET /api/v1/courses/:course_id/media_attachments

Scope: url:GET|/api/v1/courses/:course_id/media_attachments

GET /api/v1/groups/:group_id/media_attachments

Scope: url:GET|/api/v1/groups/:group_id/media_attachments

Returns media objects created by the user making the request. When using the second version, returns media objects associated with the given course.

Request Parameters:

Parameter	Type	Description
sort	string	Field to sort on. Default is “title” title sorts on user_entered_title if available, title if not. created_at sorts on the object’s creation time. Allowed values: title, created_at
order	string	Sort direction. Default is “asc” Allowed values: asc, desc
exclude[]	string	Array of data to exclude. By excluding “sources” and “tracks”, the api will not need to query kaltura, which greatly speeds up its response. sources Do not query kaltura for media_sources tracks Do not query kaltura for media_tracks Allowed values: sources, tracks

Example Request:

curl https://<canvas>/api/v1/media_objects?exclude[]=sources&exclude[]=tracks \
     -H 'Authorization: Bearer <token>'

curl https://<canvas>/api/v1/courses/17/media_objects?exclude[]=sources&exclude[]=tracks \
     -H 'Authorization: Bearer <token>'

Returns a list ofMediaObject objects.

Update Media Object

MediaObjectsController#update_media_object

PUT /api/v1/media_objects/:media_object_id

Scope: url:PUT|/api/v1/media_objects/:media_object_id

PUT /api/v1/media_attachments/:attachment_id

Scope: url:PUT|/api/v1/media_attachments/:attachment_id

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This documentation is generated directly from the Canvas LMS source code, available on Github.