mac tagging/encoding
MetaX
MetaX is a meta-data tagger for MP4 files and their derivatives, as well as QuickTime movie files. It uses a modified version of Atomic Parsley at it's core to write the tags. This is a must-have tagging app. It works in conjunction with tagChimp!
Handbrake
HandBrake is an open-source, GPL-licensed, multiplatform, multithreaded DVD to MPEG-4 converter, available for MacOS X, Linux and Windows.
Lostify
Lostify is a metadata tagger for MP4 videos. It runs on Mac OS X, and the tags it produces aim to be compatible with iTunes, the iPod, iPhone, Front Row and Apple TV.
MactheRipper
MacTheRipper is a free DVD ripper (extractor) for Mac OS X. It can extract commercial DVD movies to your hard drive, minus all the copy protections and region controls put in place by DVD publishers.
FairMount
FairMount is a tool that allows decryption of DVD content on the fly for a convenient access. FairMount does not perform the actual decryption, it simply forwards the data to VLC Media Player which is used for decryption - thus, VLC Media Player must be installed for FairMount to work.
VisualHub
VisualHub bridges the gap between numerous complicated video formatting standards, and people that just want to get the job done - just what you would expect from the Mac.
iSquint
iSquint is an iPod video conversion app for Mac OS X.
It's many times faster than QuickTime Pro, works with almost all popular video formats, and it's infinitely free-er.
Popcorn
Popcorn® 3 lets you enjoy your video anywhere you want, on the playback device of your choice. Easily make high quality copies of your DVDs and movies. Take television recordings from your Mac to the portable device of your choice for on-the-go viewing or fit 4 hours of video on a single layer-DVD.
pc tagging/encoding
Handbrake
HandBrake is an open-source, GPL-licensed, multiplatform, multithreaded DVD to MPEG-4 converter, available for MacOS X, Linux and Windows.
DVD Decrypter
DVD Decrypter is a free tool which enables you decrypt and copy a DVD to your PC's hard disk.
AutoGK
With support of DVDs, MPEG2 (such as DVB captures and transport streams), MPEG1 sources along with AVI/DV sources encoding into your favourite MPEG4 format was never as easy as now!