Win ff1.0.0.enGantuya_EnhbatThis document provides instructions for using the WinFF graphical user interface software to convert video files using FFmpeg. WinFF allows users to add video files to a list, select conversion options like output format and location, and start conversion by running FFmpeg commands in the background. Key features covered include adding/removing files, playback controls, preset editing to save common conversion settings, and preferences for settings like default output folder and priority. The document explains that WinFF is a frontend for FFmpeg which performs the actual encoding work, and conversion capabilities are dependent on FFmpeg's support for different file formats.