You could try a 2 pass approach. The first pass writes a log of audio levels per frame. You process the log to make your decisions. The second pass acts upon your decision output to select the video view.
Pass 1 :-
Code:
LoadPlugin(".....MinMaxAudio.dll")
Colon=":" # Field Separator text
...Source("Video1....")
AudioDub(...Source("AudioTrack...."))
WriteFile("AudioLevel.log", "current_frame", "colon", "AudioRMS()")
Pass 2 :-
Code:
V1=...Source("Video1....")
V2=...Source("Video2....")
ConditionalFilter(V1, V1, V2, "ChoiceVar", "equals", "1") # Select Video based on ChoiceVar
ConditionalReader ("Choice.Log", "ChoiceVar") # Load ChoiceVar table
AudioDub(...Source("AudioTrack....")) # Add Audio
Of course you still need to write the magic to convert AudioLevel.log into Choice.Log. Which should be a fairly easy task in any text handling language like Perl, Basic, C, etc.