[FFmpeg-user] Set Field Order - what is the primary syntax?

[Christoph Gerstbauer]

Hello,

what is the primary function to set the field order?
a.) -top   or
b.) -vf "setfield=..."

I tried to set the field order in a v210 MOV file via "-top" but it did 
not work. -vf "setfield=..." worked. (just b. works)

If I want to set the field order in a IMX MXF file, I can use both (a or b).

So I guess the main procedure to set the field order is the videofilter 
SETFIELD.
Is this correct?

best regards
Christoph