There is a new version of the Lagarith codec, it has a fix specifiic to Vegas and a new feature that may be useful for Vegas as it deals with RGB video.
"Version 1.3.20 introduced a new option to prevent upsampling when decoding. Checking this option and having the mode set to RGB or RGBA will prevent Lagarith from performing any colorspace conversions when encoding or decoding video.
Lagarith is a completly lossless codec and available in both 32bit and 64bit versions. It works great.
http://lags.leetcode.net/codec.html
"Version 1.3.20 introduced a new option to prevent upsampling when decoding. Checking this option and having the mode set to RGB or RGBA will prevent Lagarith from performing any colorspace conversions when encoding or decoding video.
Lagarith is a completly lossless codec and available in both 32bit and 64bit versions. It works great.
http://lags.leetcode.net/codec.html