Launching gst-launch for a device on a webpage

[Verma, Rahul]

Hello,
         I have to launch the gst-launch screen for devices like roku, samsung, sonyhtml etc. from a webpage and I am not able to figure out where to start and how to approach this project as we are 2 month intern. So please guide us how to do this.
Command line is like this:

gst-launch decklinksrc mode=18 connection=composite subdevice=0 ! video/x-raw-yuv ! ffmpegcolorspace ! ximagesink sync=false

Regards,
Rahul Verma
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