Re: final footage is split in half

I can't tell you why it is doing that, but I have had problems on some machines with certain video cards, which seem to have difficulties with rendering particles. In fact, on some machines, whenever I tried to render particles at Best quality, it would render the frame white. It was fine in medium quality, but the backgroudn footage was compromised, although the particles were not. The workaround I used under those circumstances, was to render the particles only, (you may have to put them in a seperate composite), using TGA's with Alpha. See if the particles will render on their own, and if not, try different quality settings on render. If it worked like it did for me, then turn off the particles after you rendered, import the numbered TGA's, and put them on top of your original footage. Since you are now working with images instead of particles, you should be able to render at best quality without issue.

I don't know if what you are experiencing is the same problem I encountered, but if it is, this should solve your issue.

I hope this helps,

Heath