说明：  光是看扩展名是无法知道影片的正确的编码格式的，特别像 DivX 这样的高品质、高压缩比的影片格式出现后。除了原本未压缩的 AVI 影片外，目前使用这样的扩展名格式影就还有 DivX、XviD 等等.
(Just look at the extension is no way of knowing the correct video encoding formats, in particular, such as DivX high quality, high compression ratio after the video format. In addition to the original uncompressed AVI video, the current expansion of the use of this format of video on there is DivX, XviD and so on.)