You will need two files: an uncompressed video file and an uncompressed audio file. The two will be processed separately and
muxed together. In Video Post or Premiere or whatever, export an AVI using either Uncompressed or the recommended HuffYUV codec. Huffyuv is a fast, lossless codec that's great for storing working video data.
Get Huffyuv:
http://neuron2.net/www.math.berkeley...g/huffyuv.html
Export your audio as one big 48kHz 16-bit WAV file.
Now, you should have animation.avi and animation.wav. They should sync up.