Brasília is 4 hours behind Budapest
Best overlap: 12:00 PM to 6:00 PM in Budapest is 8:00 AM to 2:00 PM in Brasília.
If you set up a recurring sync, 12:00 PM to 6:00 PM in Budapest (8:00 AM to 2:00 PM in Brasília) is the natural home for it. Because you share 6 hours of the workday, there's no need to compromise; book the time that suits the meeting, not the map. Because Budapest and Brasília don't both observe daylight saving, plan to re-check the overlap around March and November.