Player Integration - Content Management

Player Integration

HLS Caption Delivery

Kaltura Player v7 requests captions via the HLS segmented delivery flow:

1. Player requests M3U8 manifest from serveWebVTT (no segmentIndex)
2. Manifest lists WebVTT segments with timing
3. Player fetches individual segments as the playhead advances
4. Only caption assets with displayOnPlayer=true are included in the manifest
5. Language codes (2-char and 3-char ISO) are based on partner configuration

Transcript Plugin

The playkit-js-transcript plugin displays a searchable, scrolling transcript alongside the player:

Config	Values	Description
expandMode	alongside, hidden, over	Transcript panel position
showTime	true / false	Show timestamps per line
position	left, right, top, bottom	Panel location
downloadDisabled	true / false	Disable transcript download
printDisabled	true / false	Disable transcript print

The transcript plugin reads caption data from serveAsJson for structured display. It works with VOD entries only.

Caption Track Selection

When multiple caption tracks exist, the player displays a CC button with language options. The default caption (isDefault=true) is auto-selected. Users can switch tracks or disable captions.

Player Playback Plugin Data

The player receives KalturaCaptionPlaybackPluginData for each track:

Field	Description
label	Display label
format	Caption format
language	Language name
languageCode	ISO 639 code
webVttUrl	WebVTT serving URL
url	Raw caption URL
isDefault	Default track flag