Google WebM项目旨在提供可用于网络视频传输的开源视频文件格式。

Google WebM project is designed to provide an open source video format that can be used for video delivery over the web.

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目前计算机中应用的视频文件格式很多，常常容易造成混淆而影响了它的正确使用。

The paper makes a detailed comparison between several often used video file formats so that we can get a comprehensive knowledge of video files and use them better.

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目前最流行的视频文件格式是H . 264，当前是免费的，但今后可能需要付费，而且它也不是开源格式。

H.264 is currently the most popular format. It is free for now but could become a paid offering in the future.

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And as we'll see mid semester, photographs and videos and other more sophisticated file formats.

在我们学期中的时候会看到，图片和视频以及,更复杂的文件格式。

哈佛公开课 - 计算机科学课程节选