AppleScript problem

I use to interface FileMaker Pro (Claris apple) with BTV. and was very happy with that software but BTV does not existe anymore.

my script to record a movie with the name of the database was

tell application "FileMaker Pro Advanced"

set NomDuFilm to cell "nom" of current record of layout "chirurgie conflit"

set counter to cell "compteur film" of current record of layout "chirurgie conflit"

end tell

set nomdufichier to NomDuFilm & counter

tell application "BTV Pro"

launch

start recording as nomdufichier with overwrite

end tell

now with Swift it did change a little bit bur I cannot record with the right name

I know that this is not anymore Start recording but start capture. so this is my script now that does work but just impossible to give not the right name like before

tell application "FileMaker Pro"

set NomDuFilm to cell "nom" of current record of layout "chirurgie conflit"

set counter to cell "compteur film" of current record of layout "chirurgie conflit"

end tell

set nomdufichier to NomDuFilm & counter

tell application "SwiftCapture"

launch

start capture 

end tell

I would like to add: Start capture to file nomdufichier

so, it would give the right name but it does not work.

do you have an idea of the right syntax

bests