Former user wrote on 6/17/2016, 10:36 AM
Some AVI files support an alpha channel.
wwaag wrote on 6/17/2016, 12:19 PM
You can use an uncompressed avi in Vegas, although file sizes will be huge. However, to use a compressed avi codec such as Canopus HQ, you must apply a registry hack.

AKA the HappyOtter at System 1: Intel i7-8700k with HD 630 graphics plus an Nvidia 1050ti graphics card. System 2: Intel i7-3770k with HD 4000 graphics plus an AMD RX550 graphics card. System 3: Laptop. Dell Inspiron Plus 16. Intel i7-11800H, Intel Graphics. Current cameras include Panasonic FZ2500, GoPro Hero11 and Hero8 Black plus a myriad of smartPhone, pocket cameras, video cameras and film cameras going back to the original Nikon S.

Seb538 wrote on 6/17/2016, 1:08 PM
Thanks guys.
Rory Cooper wrote on 6/20/2016, 12:03 AM
if you want the clip with audio then use AVI uncompressed

if you want a sequence without audio then render to a image sequence use PNG or DPX

In Vegas you may have to check your file type on re-import of PNG sequence as premulitplied

DPX might be an issue if you import into another application for working on