vitaly-zdanevich/shotcut-multicam-sync

shotcut-multicam-sync is a small command line tool for video editors who film the same event with multiple cameras. If you have recorded one master audio track alongside video from several separate cameras, this tool automatically lines everything up in time and produces a ready to open project file for the free video editor Shotcut. Normally, matching up footage from different cameras by hand means scrubbing through each clip and guessing where it should sit on the timeline. This tool does that work for you. It works in a few steps. First it looks at the creation time saved inside each video file to get a rough starting position, accounting for the fact that iPhones and Android phones record this timestamp differently. Then it compares the audio waveform of each clip against the master audio recording to find the exact matching moment, correcting for the fact that camera clocks often drift by a few seconds. If a clip's timestamp is missing or the match is weak, it searches the entire master recording instead. Clips that still cannot be matched with confidence are left out of the final project with a warning, rather than being placed in the wrong spot, though there is an option to include them anyway. To run it, you point the tool at your master audio file and one or more folders of video clips, and it writes out a Shotcut project file where each folder becomes its own video track, already synced to the master audio. The tool also prints out how confident it was about each clip's placement, so you can spot anything that might need a manual check afterward. Using it requires a recent version of Python, the numpy library, and having ffmpeg installed on your computer, since the tool relies on it to read and analyze the audio and video files. It is a small, focused utility rather than a full editing application, and it is released under the MIT license, meaning it is free to use for any purpose.