“After the accident, I started thinking about the camera I had,” said Mr. Gregory, who spent more than 16 years doing software programming for banks and government agencies in Brazil. “Most of the time, I just leave the camera at home. I used it two times in a year, for vacation or skiing. The market really needs something better than this, something smarter than this.” He said the Graava camera has a G.P.S. chip and an accelerometer, sensors that detect location and acceleration force during any video recording. Graava’s software makes assumptions that moments when you’re speeding up sharply or slowing down are probably more exciting, and therefore worth keeping in the final cut.