Best way to conceal wrong aspect ratio?

R16

I filmed 4K DCI and edited HD 1080 x 1920.

The clips I zoomed in on lost their DCI aspect ratio, how to best conceal the edges?

I'm not a 100% sure what you mean by conceal, but i guess you mean the black bars at the top and bottom.

i would suggest to just change your project resolution to 1920x1012 to get the same aspect ratio as your 4k dci footage (1.9:1).

if this ain't an option you could change the clip scaling in your project settings. i believe the standard setting is crop to fit and the right setting for you should be fill to fit.

Sent from my Pixel 3 XL using Tapatalk

I'm also unclear about what you're trying to achieve.

Is it correct that you're editing in a vertical frame?

Zoom in a little bit where necessary. Or ask if you can ship it with small letterbox borders. Make your decision consistent.

Seems a 2K DCI timeline would be the first choice, the aspect ratio doesn't have to be wrong.

If 1920X1080 is mandated then add the letterbox with output blanking.

Good Luck