I have been using this After Effects export plugin called AfterCodecs it has allowed me to output high quality renders fairly quickly, one of the export options is one I had not heard of before HAP Q. This codec seems like it would be a good fit for Vegas 14
Here is the info on it
http://aescripts.com/aftercodecs/
http://vdmx.vidvox.net/blog/hap
Codec download from github
https://github.com/vidvox/hap-qt-codec/releases/