如果你用YouTubeDownloader或都抓取视频的站点的话，你可以下载和转换一步完成。但是你在别的地方下载的可能就需要了。
If you're using the YouTube Downloader or one of the video ripping sites you can download and convert in one step, but if you downloaded from elsewhere you will probably want to convert them.
进行测试的时候，测试人员可以使用该工具对测试中的应用抓取图片，或者甚至录制测试过程的部分或者完整屏幕视频。
As the test is being run the tester can use the tool to capture images of the application under test, or even partial or full screen video of the test being run.
本文主要强调三个最佳实践，用于解决抓取和索引视频内容时最常碰到的问题。
We'd like to highlight three best practices that address some of the most common problems found when crawling and indexing video content.
同时注意只有在抓取单一祯模式下才可用，在录制视频时则不行。
Also note that this only makes sense when you're capturing to single-frame images, not when you're encoding to a video on-the-fly.
同时注意只有在抓取单一祯模式下才可用，在录制视频时则不行。
Also note that this only makes sense when you're capturing to single-frame images, not when you're encoding to a video on-the-fly.
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