First of all, thank you for your time and helpful advice.
I just wanted to follow up on the solution I wound up using... I downloaded Microsoft Expression Encoder (Free version) and was able to get it done eventually.
This is not to take anything away from the great open source tools and options available, I blame my video editing ignorance and lack of time (needed to get this done and upload it asap for the website), but it is done at last.
Thank you again for your help.