WinFF (Audio & Multimedia - Video Tools)

WinFF is a cross platform batch GUI for FFmpeg. It will convert most any audio or video file that FFmpeg will convert. Software includes presets for most common file conversions with the option to add advanced conversion options supported by FFmpeg to one or more files in a batch. WinFF converts multiple files in a batch, with support for multiple formats output in the same batch. For example, you can convert FLV, WMV, AVI and WAV simultaneously.