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.
vobwalker walks through a .VOB file containing DVD video and extracts lists of VOBUs to a set of chapter files. Each file begins with a VOBU that has no predecessor (i.e., does not point at a preceding VOBU) and contains the list of VOBUs found by following the successor pointers along the list. Although it does not adjust the pointers in the VOBUs (but merely copies them from one file to another), the created chapter files are suitable for use by a program such as dvdauthor that expects to be responsible for filling in the VOBUs.
Fetchgals is a Web spider that locates and optionally downloads free pictures and movies from the internet. It comes with an extensive list of Web sites that are visited to locate thumbnail galleries, and the pictures or movies from these galleries can then be downloaded or linked to from local HTML pages. The list of downloaded galleries is kept so that downloads can be resumed after interruption and so that nothing is ever downloaded twice. Disk space is monitored to avoid overruns.
vobps2fix is a tool that runs through a set of .VOB files created by dvdauthor and tweaks them so that the Playstation 2 will play them without pausing. The Playstation 2 is a bit finicky about the DVD format and pauses frequently when encountering certain timestamps, even if the DVDs work on other players.