Frederick Wiseman, filmmaker, 84, on a walk in Paris. Wiseman’s documentary ‘‘National Gallery’’ had its premiere at the Directors’ Fortnight at Cannes this year.

Is there a difference from the way you work now and the way you worked when you were first starting out?

I think I’ve learned more about how to make a movie. The basic approach hasn’t changed. The method that I follow is the same one that I’ve always followed. I hope that I’ve learned from one movie to the next, at least enough not to make the same mistakes.

What’s the most grueling part of your filmmaking then?

Raising the money.

Early on, did you ever think you’d still be making movies at your age?

I didn’t think about it at all. I have a hard time recognizing that I’m 84, almost 85. I’m in complete denial, which I think is extremely useful. Of course from time to time I allow myself to be aware of it, but it’s not something that I dwell on. I like working. I work very intensely.

Any advice for young filmmakers?

Marry rich.

And what about advice for your peers, filmmakers your age?

Everybody complains about their aches and pains and all that, but my friends are either dead or are still working.