I recorded a live performance of a guitar/singer on to a stereo track in Sonar X1d P Expanded. Also recorded the same performance with Olympus digital camera in video capture mode. Camera a cheap one. Imported video and stereo audio track into project with the sonar recording. Lined up one point at beginning of song on both stereo tracks; there was a gradual drift away from each other as the camera timing clock is not as accurate as sonar's. I need to stretch or in this case shrink the sonar recorded track so that all transients line up throughout the song. 
Thanks, this will help enormously because I recorded twenty-two songs at this gig and they will all need to be fixed.
john  :)

Don't know how you'd do it in Sonar, but in a video editor you'd use a product like Pluraleyes to sync the audio tracks to the video.

make sure the frame rate you recorded in matches sonar.