静态getA simple set of options like { audio: true, video: true } to indicate capturing both. For more details, see https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia.
The success handler which is called with a single argument: the Blob URL of the media, which can be used with the Video element.
The error handler which is called with a single argument: the Error object.
静态supported
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The Media class is used for capturing camera and microphone input. You can capture either one or both simultaneously. Before calling getCamera, you can use supported() to check if the current browser supports it. NOTE: Currently, Media only supports Android on mobile platforms, not iOS. It can only be fully used in FireFox; testing in Chrome does not capture video.
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Media 类用于捕捉摄像头和麦克风。可以单独捕捉任一设备，或者同时捕捉两者。在使用之前，可以使用
Media.supported()方法检查当前浏览器是否支持。 NOTE: 目前 Media 仅在移动平台上支持 Android，不支持 iOS。只能在 FireFox 中完整使用，在 Chrome 中测试时无法捕捉视频。