Convert an ongoing audio call into video call

[sandeepk.kdp@xxxxxxxxx (Sandeep Karanth)]

Hi all,
         Could anyone tell me how using pjsua-lib(pjproject2.0alpha2) api's
can an ongoing audio call between 2 endpoints be converted into a video
call.What is the set of pjsua-lib functions that needs to be called to do
the same.

Thanks,
Sandeep
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