问题
How to capture video from a video device and make that video available in HTML5 canvas ?
回答1:
Perhaps you should use HTML5 Video Capturing feature.
This way instead of installing any plugins tell users to upgrade their browser ;)
回答2:
Currently, the HTML5 standard doesn't offer microphone and camera capabilities.
But, there's a jQuery plugin that offers just that using a small flash utility
来源：https://stackoverflow.com/questions/7386675/video-capture-in-html-5