WinFF

WinFF 是 FFmpeg 的图形化界面。使用 WinFF，你可以快速、轻易地对视频文件进行转换。WinFF 支持转换时下流行的视频文件格式，并可针对多个视频文件进行一次性地转换，既实用又方便。

WinFF is a GUI for the command line video converter, FFMPEG. It will convert most any video file that FFmpeg will convert. WinFF does multiple files in multiple formats at one time. You can for example convert mpeg's, flv's, and mov's, all into avi's all at once.