First of all, download the program from the main website : http://obsproject.com/download

Install/extract then run OBS.

When OBS runs the follows following steps:

• Add Live Video in OBS sources section.
• Now go to settings from OBS controls section
• Click on Stream menu.
• Now select the stream type.
• Enter rtmp URL and Stream key and press OK
• Now click Start Streaming from OBS Controls section