my parents ignored me, when I came out

Have you discussed it further with your parents? Such as asking why they don't believe you?
Maybe they don't want to hear you because they have concerns that they don't know how to discuss with you. Maybe they're just experiencing a degree of shock.
Acting in denial of what you have told them doesn't necessarily mean that they dislike it, just because they're adults doesn't mean they automatically have the skills to cope with something unexpected or unknown. As heterosexual parents (I presume) they are open to all the anti-gay propaganda out there and that may be their only knowledge on the subject, causing them to fear for the happy life they want for you.
How are they preventing you from perusing your film goal? Is it just that they discourage you? Perhaps if you show your commitment to your cause and your film career, they will start to appreciate that you are serious about this.

 

You know what does that more than "hanging around gay men"? Falling in love with them and getting into relationships.
I had a friend who's mother told him almost exactly the same thing. She told him that his gay friends weren't even allowed to come into the street, never mind the house. It didn't stop him living a happy life as a gay man and it shouldn't stop you. For the record he gets on great with his mum now - at some point straight siblings always manage to out do you in the disappointment competition :icon_wink.
Have you asked your parents exactly what it is that makes them think that you can't be gay? And why they don't want you to be gay?

 

Who knows the reason why parents try to hide the truth telling to their self that their son/doughter is gay/bisexual/trans because someone - who should be very powerful indeed! - has influenced him/her.

My dad said to me the same when I come out and the reason why it happened is because he didn't find a way to understand what I was trying to tell him.
It was an enormous news he's still trying to swallow.
So I can get you and what you're feeling right now.
The hardest part of the coming out is not the coming out itself, but what happen after it, therefore you have to be vary patient and clever-headed with them.

At best the more you'll talk with them, the more understanding they'll be.