Two main video processing frameworks exist for Pure data: Gem and PDP.

pix_2pdp captures the contents of a Gem pix object and transforms it to a PDP packet (use colorspace YUV for the fastest conversion).
So it's possible to convert from Gem to PDP to Gem to PDP to ...

What can you do with it?

• use pix_video/pix_2pdp for firewire input in PDP
• use pix_2pdp/pdp_rec~ to record Gem pixes
• maybe switch between Gem and PDP all the time
• ...

pix_2pdp is based on code of gem2pdp by Yves Degoyon and is a part of the gem2pdp package.
Many thanks to IOhannes M Zmoelnig for support!

Implemented colorspaces: RGB, RGBA, YUV, Grey.
For more information how to use it look at the help patch.