DFD Webcam Archives lets you automatically archive your webcam videos with noise level graphs.
Github Page [1]
This application requires ffmpeg [2] (with H.264 / MP4 support), lame [3], sox [4], awk, and cron jobs on a server stack. Your PHP server must support GD for graphs, and you may need to increase your php.ini memory_limit to 1024MB or even higher / max_execution_time to 900 or even higher, if you have very large / long video files.
