@amazon-devices/kepler-player-client

Open Beta Documentation Amazon offers this technical documentation as part of a pre-release, open beta. The features described might change as Amazon receives feedback and iterates on the features. For the most current feature information, see the Release Notes.

The Kepler Player Client API provides client-side headless JavaScript media playback functionality for media app developers on the Kepler platform. This runs media playback on a separate JavaScript thread from the UI, providing up to 30% improvement in Time to First Video Frame (TTFVF) for apps with complex UIs.

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Setup

Add the following library dependency to the dependencies section of your package.json file.

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 "@amazon-devices/headless-task-manager": "~1.0.0",
 "@amazon-devices/kepler-player-server": "~2.0.4",
 "@amazon-devices/kepler-player-client": "~2.0.4",

Add following components and privileges in your manifest.toml.

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 [[components.interactive]]
 id = "<your-app-package-name>.main"
 runtime-module = "/com.amazon.kepler.keplerscript.runtime.loader_2@IKeplerScript_2_0" 
 launch-type = "singleton"
 categories = ["com.amazon.category.main"]

 [[components.service]]
 id = "<your-app-package-name>.service"
 runtime-module = "/com.amazon.kepler.keplerscript.runtime.loader_2@IKeplerScript_2_0"
 launch-type = "singleton"
 .
 .
 .

 [processes]
 # Ensure that the player UI and headless JS player components are in the same process group
 [[processes.group]]
 component-ids = ["<your-app-package-name>.main", "<your-app-package-name>.service"]

 .
 .
 .

 [wants]

 [[wants.service]]
 id = "<your-app-package-name>.service"

 .
 .
 .

 [offers]

 [[offers.service]]
 id = "<your-app-package-name>.service"

Modules

Last updated: Sep 30, 2025

@amazon-devices/kepler-player-client

Get started

Setup

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Modules