slackbuilds_ponce/graphics/zbar

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.