I use a 10 bit decklink codec with a 16 bit project and still get banding AE

[Michael Duff]

hi
We also use 10bit decklink cards and often come across banding on our broadcast monitors. It is quite normal that you don’t see banding on your computer monitor. If you do a search through the COW archives for banding you will find a number of ways to reduce it.
We normally find that doing a slight colour balance will reduce banding as certain colours tend to show banding more… like blue…..
also add a little bit of noise over the banding
feathered masks also seem to cause more banding, so try using a luma matte instead

hope this heaps you out