QUESTION 1 – 5 different consumer camcorders were used by casts / friends. Most are spitting out MPG-2:
Type: MPEG-2 Transport Stream
Streams
Video: 00:00:07.508, 29.970 fps interlaced, 1440x1080x12, AVC
file extentions varies from AVCHD Video (.MTS)(Sony camcorder) to Video Clip (.avi) (captured from mini tapes of older footage) to a few .mov files, usually those come from other weird formats I had to pre-render a few years back because they were making my NLE crash.
QUESTION 2 – When I pre-render in Vegas I chose SONY mxf, which produces very small files, renders super fast but does not show much quality loss, it is a good compromise, that was suggested by the Sony Vegas team.
This morning I will test one of the avi files see if I have the same problem. i think so far I have only converted EPISODE 4, which is all made of .MTS clips, so I;ll try importing a few avi fies and rendering them out see if it does the same thing and post result here.