Use Netbackup 7.7 `WITH KEEP_CDC`
https://www.veritas.com/support/en_US.html

you'll have to find the SQL Agent Guide for that version of Netbackup and see what it supports. Technically you need 7.5 to backup SQL 2012 but I think that version supports only the bare features. I think they only introduced some of the advanced features in version 8, but I can't say with 100% certainty. You will need to find the doc for your version and check to see what it supports