heathen3017 said:
As there’s no way to make the DVD footage 16:9 (has not been released by NBC or whoever made Friends), the only way to make the output image ratio consistent would be to crop the BR footage. Ofc, OP can do what he likes, just my thoughts on this.
I’d crop DVD to 16:9 to avoid changing AR.
Did just that with some Baywatch episodes.