Gstreamer live.sh not Working

[imharish63]

After installing Gstreamer but i couldn't run live.sh of it and this command throws errors as below:

harish@harish:~/Downloads/examples-master/GStreamer$ ./gstreamer_live.sh
No device specified. Exit.

Usage: ./gstreamer_live.sh -d -b

Options:
-b, --board Currently used board. e.g. -b nvidia
Options:
nitrogen for Nitrogen boards
nvidia for NVIDIA boards
wandboard for Wandboard boards
apalis_imx8 for Apalis iMX8 boards
-d, --device Device to use. e.g. -d /dev/video3
-h, --help Display help