I thought “Begin Again” (2014) was going to be a romantic comedy that takes place in the music industry. I also thought it might be a dud. Wrong and wrong. There’s romance and comedy, and much more music than I thought, but this film defies convention. It’s almost like a boxing movie, but with the music industry substituting for boxing. Mark Ruffalo is a washed-up former champ who gets his groove back thanks to the inspiration of an up-and-coming bantamweight played by Keira Knightley. There’s lots of familiar faces (Catherine Keener, Mos Def, Adam Levine, Hailee Steinfeld, etc.). Nicely done.