Talk about convergence! Normally Emmys are won by TV people, not newspaper folk. But Chronicle journalist James Irwin won an Emmy on Monday for an online video documentary on four teens as they took a sobering look at life behind bars in San Quentin State Prison. Irwin, director of video journalism for The Chronicle, got his start at a Reno television station in 1979 but left television for a job with The Chronicle and its Web affiliate, SFGate.com, in 1996. Here’s the story about his award and the video.