[Hairy Hippy]

@DanCooper Happy New Year again!

Couple of suggestions for the new version if I may:

Add to audio codec mapping as defaults:
a_aac-2=aac
mp4a-40-2=aac
lc=aac
a_eac3=eac3
a_opus=opus - for this one, not sure where the icons come from but here's a suggestion:
https://encrypted-tbn0.gstatic.com/image...w&usqp=CAU

If the audio language is blank/not detected, optional setting to default to user's language.

If audio channels >8, replace with:
18=6
21=7
24=8