Push, Convert, or Stream Video to Asterisk filespace

I almost want to give up. (not true) I have Sony Vegas Pro. I would like to create cool production grade videos and put them in an Asterisk automated attendant setting. I have no problem hand creating the msg0000.txt, separating the wav file (msg0000.wav) and the video (msg0000.h264) and FTPing them into the appropriate file space. OR Is there a java or app based thing where I could push it through a SIP event as a voice mail recording whereas I can hijack it and put it in a dialable file space? OR is there a basic converter out there that doesn’t crash and hang like ffasterisk?

Thanks much