This tool is required to enable Firefox add-on Video Download Helper to handle ADP files
This codec is awesome - encodes and decodes tons of media file formats and more....! :)
This set of tools are command line only and the full help for their options makes up I'd say around 100 screens of closely packed info - of which you'll probably only ever use 10 to 15. Just my kind of tool :) Btw: I prefer libav over the closely related ffmpeg tools, mostly because of the philosophy behind the development. Also ffmpeg seems a little slower in adapting new features. But from the enduser's perspective there is very little difference.