Does anyone know how to continue an interrupted ffmpeg job?

I've looked through the official documentation and the man page and can't see anything about continuing an existing file conversion where it left off.

Also, as an alternative solution, any linux/unix experts know how to (or whether on can) pause a process and preserve its context across a reboot?

Since I'm mostly converting avi to mpg, and (i hear) you can simply concatenate mpgs, I have the option of doing the conversion in pieces.... but I'd much rather just tell ffmpeg to pick up where it left off and let it go at it.

I have played with linux and ffmpeg on linux quite a bit and even compiled my own ffmpeg from source. I don't know if what you are asking is possible. You might also want to check out an application called winff. It is a gui for ffmpeg it has a linux version available. it really simplifies things allot.