Ne znam za Vegas, ali u Premieru imas "Export still frame" (ctrl+shift+m)... verovatno da i u Vegasu postoji slicna opcija, procackaj malo po meniju (export timeline...frame...still image...freez out point ili sl.), a duzinu mu odredis ( probaj desni klik misem na taj frame, pa "Duration" ili speed )...
It's a perfect day for freediving! :)