The .flv video format is used by most of the popular online movie viewing websites. Video websites are strict on how you can download clips; there are specific free utilities to use to download .flv videos and to convert any desired format for viewing later. Convert a video clip of (almost) any format to .flv format in Windows. By using freely available multimedia software, easy conversion from .avi, mp4, mpg, mpeg and most other common formats is possible.
Conversion of the .flv to other formats other formats is dependent on the types of codec installed on your system. Conversion in Linux is done by FFmpeg and the Mencoder software that are installed on Debian. Independent of the operating system, you can also make conversions from.flv to any video format and vice versa.