MediaCapture

MediaCapture is a JavaScript API that allows web applications to access and control media input devices such as cameras and microphones. It provides a standardized way to capture still images, record video, and record audio directly from the user's device within the browser. The API is part of the larger Media Capture and Streams API specification.

The core functionality of MediaCapture revolves around the navigator.mediaDevices.getUserMedia() method. This method prompts the user for permission to access specified media types, such as audio and video. If permission is granted, it returns a MediaStream object, which represents the stream of media data from the device. This MediaStream can then be displayed in a video element or processed further.

Developers can use MediaCapture to build a variety of interactive features into web applications. Examples include video conferencing, live streaming, image capture for social media, voice recording applications, and augmented reality experiences. The API offers control over various aspects of media capture, such as resolution, frame rate, and audio codecs, though specific capabilities depend on the user's hardware and browser support.

Security and privacy are key considerations for MediaCapture. The API requires explicit user permission before accessing any media devices, and the user is typically notified when a device is active. This ensures that users have control over their personal data and can prevent unauthorized access. MediaCapture is widely supported across modern web browsers.