Vidiac

I just did a quick test in Flix Pro. ( I choose the 512K preset, which resizes to 320x???. Height size will be determined by source aspect ratio.) In general if you pick a lower bitrate preset the compression will be faster.

Clip 1 source is 720x480, 24fps, 10 seconds, raw avi.
2 pass took 22 seconds
1 pass took 11 seconds

Clip 2 source is 480x208, 24fps, 1:19 length, mpeg4 mov.
2 pass took 1:23
1 pass took 53 seconds

This is for Flix Pro version 8.001. I'm running on a P4 3.0GHz.

I would always suggest using 2 pass to get better quality, but this will highly depend on the source material.