IN THIS CHAPTER
Playing music with play, ogg123, and mpg321
Adjusting audio with alsamixer and aumix
Ripping music CDs with cdparanoia
Encoding music with oggenc, flac, and lame
Streaming music with icecast and ices
Converting audio files with sox
Transforming digital images with convert
There's no need to go to a GUI tool, if all you need to do is play a song or convert an image or audio file to a different form. There are commands for working with multimedia files (audio or images) that are quick and efficient if you find yourself working from the shell. And if you need to manipulate batches of multimedia files, the same command you use to transform one file can be added to a script to repeat the process on many files.
This chapter focuses on tools for working with audio and digital image files from the shell.
There are commands available for Linux systems that can manipulate files in dozens of audio formats. Commands such as
ogg123, mpg321, and
play can be used to listen to audio files. There are commands for ripping songs from music CDs and encoding them to store efficiently. There are even commands to let you stream audio so anyone on your network can listen to your playlist.
Depending on the audio format you want to play, there are several command line players available for Linux. The
play command (based on the
sox facility, described later), can play audio files in multiple, freely available formats. You can use