I have in input a DNxHD 120 in mov container 25fps interlaced upper field, I have to do various kind of edits, cuts, replace some pieces with after effects compositions and at the end of all the job export everything as a MXF 25fps again interlaced upper field.
Until now I always worked only with progressive contents so I'm unsure if what I'm doing is correct:
I imported the footage into the project
Created a new sequence based on what i think is the correct format: 1080 25fps interlaced upper field
Started cutting, pasting and replaced some after effects comps
Export with media encoder using the DNxHD SD 1080i 50 (i wonder why i can't find a 1080i 25 preset), however even if is writtend 50 it seems i can pick 25 fps.
Is all this correct ? I mean what's the best practice ? I'm keeping everything interlaced upper field. I think Premiere is a professional software able to handle all the footage in interlaced without problems.
Should I instead convert and make everything progressive first and then export again back in interlaced? (i fear this solution is not very good)
I also have this error if i try to rotobrush the footage:
This is starting to confuse me even more, why i should use a 50fps ?