sudo apt-get install zbar-tools

zbarimg [options] <image>...

scan and decode bar codes from one or more image files

options:
    -h, --help      display this help text
    --version       display version information and exit
    -q, --quiet     minimal output, only print decoded symbol data
    -v, --verbose   increase debug output level
    --verbose=N     set specific debug output level
    -d, --display   enable display of following images to the screen
    -D, --nodisplay disable display of following images (default)
    --xml, --noxml  enable/disable XML output format
    --raw           output decoded symbol data without converting charsets
    -1, --oneshot   exit after scanning one bar code
    -S<CONFIG>[=<VALUE>], --set <CONFIG>[=<VALUE>]
                    set decoder/scanner <CONFIG> to <VALUE> (or 1)

    --nodbus        disable dbus message

$ zbarimg QRCTF.png 
QR-Code:https://soundcloud.com/user-86667759/thm-ctf-vol1