Thanks for the replies guys.
This can get closed off as resolved. Resetting Vegas 20 to default settings fixed it (something I should've tried already, apologies).
I think it had something to do with legacy encoding (AVC), this would be the only option I change along with bumping the RAM for preview. I'm unsure, but happy to have Voukoder back in Vegas!
I just completed a render on my laptop (GTX 1050, HD 630 GPUs) with Voukoder at default x264 settings without issue.
Version of Voukoder and Vegas?
Also, what video files are you working with?
Just reporting that Voukoder is immediately crashing with the latest version of Magix Vegas. Every encoder is causing the program to completely crash and bring up the "submit error" report.
This has also been posted on the MAGIX support forum. Just unsure if it's just me or if it's affecting multiple users.
I have tried a complete reinstall of Voukoder + connector.