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Opus MediaRecorder Example

opus-media-recorder is a MediaRecorder API polyfill written in JavaScript and C++ (WebAssembly). It aims a cross-browser Opus codec support with various audio formats such as Ogg and WebM. This page is designed to test opus-media-recorder and to show MediaRecorder API examples.

For more information, please visit the main page.

MediaRecorder settings

MIME Type

timeslice (in milliseconds)

Voice recording

Stream not created. Click "create" button.

Recording player

Download Link

Note: Some browsers (e.g. Safari and old Edge) do not support Ogg/WebM playback on the browser. In this case you should download the recording and play it using a supported media player (e.g. VLC Player)

Note: Microphone recording will not work on third-party browsers of iOS like Chrome for iOS. See issue #1.