This The Sound of Music screencap contains
fedora, felt hat, homburg, stetson, and trilby.
There might also be
boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, porkpie, porkpie hat, and business suit.
A Dutch family filmed in Salzburg 'The Sound of Music' on the same film locations, and mixed them with the original movie shots. Very funny! Not much has changed in 47 years.