I am having issues importing avi files (movies I have videotaped) into Blender and figured out it as to do with my Codecs. Now, I understand some about Codecs, but still want to know how to change/alter them so that I can import avi files into Blender.
use a tool such as virtual-dub to re-encode your footage. don’t use MS codecs if you plan to import the footage in blender (didn’t work for me).
in general, image sequences (TGA’s or JPEG’S for lower quality) are my preferred method for handling animations, but some ppl think different.