a2b invokes conversion tools in sequence to convert files from one type to another, possibly performing some extra processing along the way. Itis a wrapper for many programs like gif2png, latex2html, netpbm, mencoder, ffmpeg, oggenc, etc., that can convert content from one type to another. It can covert text, documents, images, audio, and video and more. Some examples: a2b test.mp3 test.ogg; mencoder_opts="-ss 60 -endpos 10" a2b video.avi clip.flv; a2b -g=subtitles dvd://8 movie.sub; a2b -q http://sam.nipl.net/ sam.aac. That last example downloads the author's Web page, converts it to text with lynx -dump, speaks the text with flite or espeak, and converts the audio file to AAC with faac.
The "fmconv" script modifies the /etc/fstab file and the /boot/grub/menu.lst file to use either UUID strings or device filenames depending upon the parameter settings (-u or -d). This easy conversion to device filenames for maintenance purposes (UUID strings are hard to maintain, and just annoying), and the conversion back to UUID strings allows grub to work in an environment where the boot disk sequence is poorly defined by the BIOS. The original files are never overwritten.