AppleScript Quicktime record on different camera - applescript

Question

How do I change the quicktime document current camera to a different camera in AppleScript?
I want the script to automatically switch to my iphone and then record a video.
I have it done so that it's using system events clicks but this way is slow and clunky.
tell application "QuickTime Player"
activate
tell application "System Events"
activate
tell process "QuickTime Player"
click menu item "New Movie Recording" of menu "File" of menu bar 1
set cameras to button 3 of window 1
click cameras
delay 0.5
click menu item 3 of menu 1 of cameras
end tell
end tell
delay 2
tell (document 0)
start
delay 3
stop
end tell
end tell

Answer 1

As per the QuickTime Player scripting library, you can retrieve a list of video recording devices using the command:
get [id, name] of video recording devices
which will return something like:
{{"CC26302Z3U5H0X0FP", "iGlasses"}, {"FaceTime Camera", "iGlasses"}}
corresponding the id and name of each camera, respectively. Each movie recording has a bunch of properties, one of which is called current camera, which is of type video recording device. This property is both readable and settable, in theory.
Therefore, one ought to be to do this:
set R to new movie recording -- creates new recording
set current camera of R to video recording device named "iGlasses"
However, this command does absolutely nothing. Indeed, when I try and read the value of the property, using get current camera of R, it returns missing value.
So, my feeling is that this feature has yet to be implemented properly into AppleScript, or there's a bug in QuickTime Player.
Doing a quick Google now reveals lots of people have encountered this problem and others have come to the same conclusion as I, e.g. here.
Other people's suggestions all seem to resort to GUI scripting, which I share your feelings about.
Sorry this isn't the answer you were hoping for.