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It contains libavcodec, libavutil, libavformat, libavfilter, libavdevice, libswscale and libswresample which can be used by applications. As well as ffmpeg, ffserver, ffplay and ffprobe which can be used by end users for transcoding, streaming and playing.
Install FFmpeg on Ubuntu 14.10
Open the terminal and run the following commands
sudo add-apt-repository ppa:kirillshkrogalev/ffmpeg-next
sudo apt-get update
sudo apt-get install ffmpeg
Using ffmpeg
Syntax
ffmpeg [[infile options][-i infile]]... {[outfile options] outfile}...
FFmpeg Examples
To set the video bitrate of the output file to 64 kbit/s
ffmpeg -i input.avi -b:v 64k -bufsize 64k output.avi
To force the frame rate of the output file to 24 fps
ffmpeg -i input.avi -r 24 output.avi
To force the frame rate of the input file (valid for raw formats only) to 1 fps and the frame rate of the output file to 24 fps
ffmpeg -r 1 -i input.m2v -r 24 output.avi
The format option may be needed for raw input files.
For more details about FFmpeg check ffmpeg documentation page