Processing.org and Flash are two completely different languages.  Each has similar capabilities.  It's like asking can you convert a windows exe to a linux binary.  You could probably re-write flash in processing.org to replicate whatever flash does. 

As far as programs that convert from one language to another, i.e. a multilanguage compiler, I doubt that one exists.  First, it would be a huge amount of work.  Second, Macromedia/Adobe/Apple would not do such as thing as it would probably cause people to foregoe flash altogether; the processing.org folks probably wouldn't because it would be like walking backwards.

In short, no there's no simple way to export .flv files to .pde.

Don't ask two identical questions in different sections, please.
I delete the other question as I was the only one to answer it, I paste the answer below.

Short answer: no. I don't see how you can convert a video to some source code.
Not a Processing implementation question, BTW, no other language involved.

PS.: If you mean playing a .flv in Processing, it might be more doable, but you have to locate a Java (or Processing) library able to do that, if it exists.