How to Sync Interview B-Roll When Camera Clocks Were Never Matched

On a small interview shoot, the main camera, B-roll camera, and audio recorder were never time-synced. Everyone thought it would be fine because the interview had a clap at the start. The interview synced, but the B-roll was shot later in pieces, and the editor spent too much time guessing where clips belonged. In post, I built a sync map instead of dragging clips randomly. I sorted by file…