M.Arch

Admission to the course is based on the candidates performance in a relevant entrance examination, such as GATE, CEED, TANCET etc. some such exams are listed here with their details.
GATE- Graduate Aptitude Test in Engineering is conducted jointly by IITs and the Indian Institute of Science. The minimum eligibility to take the test is graduation.
CEED- Common Entrance Examination for Design is conducted jointly by the Indian Institute of Science and IITs.
Also, there are some colleges and universities that conduct their own entrance tests for admission to the course, while some offer direct admission too. Candidates aspiring for admission to the course need to have completed graduation in Architecture from a recognized university with a minimum aggregate score of 50%. Regards.

Your doing B.Arch and M.Arch shall not stop you from going to the field of Films because the scope is vast there. We know that Film Making is not just about the people we see on the screen or the people who are heard through their music and voice in songs. The entire set-up of film-making is made by those who are the masters of their technical fields. Architecture, to be taken as a Mechanical Engineering task, but of the Design Making relates to Set Construction. Please get associated with the Film Studios and also give a serious thought to joining TV industry as well because they are also investing a lot in construction of sets. Architecture shall add to your value.

If you have interest in same field then you should do M.Arch else go for MBA. You need to qualify any entrance test (such as CAT / MAT/ XAT/ NMAT/ CMAT/ GMAT/ NEST) and should also have min of 50% to 55% in your Bachelors. You can do MBA in any specializations of your interest. I am listing below some of the common and most opted specialisation of the MBA course, international business management, agribusiness management, e-business/ e-commerce, financial market, entrepreneurship, finance, human resources management information systems marketing, operations, management strategic/ risk management, technology management.
Some good colleges are:
IIMs
Xavier's Labour Relations Institute, Jamshedpur (accepts XAT)
Lovely Professional University, Punjab (accepts / CAT / MAT / XAT / LPU-NEST Department of Management Studies, IIT Delhi
Indian Institute of Foreign Trade, Delhi (own test)
Management Development Institute (MDI), Gurgaon
Bharathidasan Institute of Management (BIM), Trichy
Narsee Monjee Institute of Management Studies, Mumbai (accepts NMAT)
National Institute of Industrial Engineering (NITIE), Mumbai
SCMHRD, Pune (accepts SNAP)
SP Jain Institute of Management and Research (SPJIMR), Mumbai
Shailesh J. Mehta School of Management, IIT Bombay
Tata Institute of Social Sciences, Mumbai (own test)
Pandit Ravishankar Shukla University (CAT/MAT)