How do I reset the default audio track to track 2?

[birms]

All of my videos have the primary audio on track 2, not 1, so when I play or convert, I have to manually change the track to 2 every time--and when I convert there seems to be no way to change the audio track (it takes track 1 only every time.) Any idea how I make track 2 the default (input on conversion or play, not output)--or how do I choose track 2 when I want to convert? It seems like a simple question but I can't see any way to do it. Thanks in advance!

[InTheWings]

add :audio-track=1 in advanced options