ZBar Bar Code Reader is an open source software suite for reading bar codes from various sources, such as video streams, image files, and raw intensity sensors. It supports EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Interleaved 2 of 5, and QR Code. Included with the library are basic applications for decoding captured bar code images and using a video device (e.g. webcam) as a bar code scanner. For application developers, language bindings are included for C, C++, Python, and Perl, as well as GUI widgets for Qt, GTK, and PyGTK. If you want to enable reading from video stream, pass VIDEO=yes to the build script when executing it.