FFmpeg is a cross-platform solution to convert streaming audio and video files from one format to another. In the original format, Audio and Video files are huge and consume a lot of storage space. You need to convert it to a format that is faster to load and designed for web pages. FFmpeg converts various video formats such as .Wmv, .Mpg, .Eve and many others to the .Flv video format to stream the video online. FFmpeg can also be used for other audio and video data manipulation. For e.g. change the sampling rate of the audio, change the frame rate of the video, cropping or resizing the video etc.