* You are viewing Posts Tagged ‘USB webcam’

ffmpeg time lapse notes

ffmpeg is a movie-encoding command line tool that is also useful for capturing and assembling time lapse movies, particularly using webcams. Below are some example commands to get it to do stuff. It is run from a terminal command line on Linux, OSX, and Windows. You will probably want to add the location of the ffmpeg files to your system PATH so that you can invoke ffmpeg from any directory.

The code shown here is specific to Windows 7 and later machines, so some commands will not work on OSX or Linux. Specifically, Windows uses the “dshow” option for … Continue Reading

USB extension cables

Here’s a standard USB webcam sitting on top of 30 meters of USB extension cables (three 10 meter cables). Three cables daisy chained together with the webcam attached to the end seems to be the functional limit. Adding a 4th 10-meter cable results in the camera not being recognized.

30 meters of cable powering a USB webcam, which is taking its self-portrait in the mirror.

These 10 meter extension cables, also called “repeater” cables, are available for around $10 apiece. We’ve been using them to run a … Continue Reading