From Magix support
Thank you for your message.
I believe that mp4 is not supported by Vegas Pro 14 for neither import nor export.
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Best regards,
'Name Withheld'
MAGIX Software GmbH
Postfach 200914
01194 Dresden - Germany
WTF ? I just rendered MP4 1080 /5.1, Oddly I couldn't do this last time I tried but now , some new rendering pop up appear with a new dark UI and the file rendered.... what's happening? 😅