Final Cut GUI scripting

I’ve been banging my head against the wall with this one…

I’m trying to GUI script Final Cut to export a still image using QuickTime Conversion. Bringing up the export dialog works fine with this:

do_submenu("Final Cut Pro", "File", "Export", "Using QuickTime Conversion...")

on do_submenu(app_name, menu_name, menu_item, submenu_item)
		-- bring the target application to the front
		tell application app_name
		end tell
		tell application "System Events"
			tell process app_name
				tell menu bar 1
					tell menu bar item menu_name
						tell menu menu_name
							tell menu item menu_item
								tell menu menu_item
									click menu item submenu_item
								end tell
							end tell
						end tell
					end tell
				end tell
			end tell
		end tell
		return true
	on error error_message
		return false
	end try
end do_submenu

What I can’t get to work is selecting the “Still Image” from the Format popup button, setting the JPG settings, et al.

Any help would be greatly appreciated.

Have you tried pointing “Accessibility Inspector” at the “Using QuickTime Conversion…” dialog?

Pop up buttons usually get addressed by something along these lines:
“value of pop up button “Rotation:” of group 1 of tab group 1 of window…”
The button likes a click so as to display its menu.

See this thread
for complete code dealing with a pop up menu button.