How to achieve sound transmission from the D-link DCS-2130 camera when connected via http from the world?

Question

D-Link

Connection to the video stream is performed using VLC at the external address from which the port is forwarded to the internal address of the local network in which the camera is located, the video is viewed via http.
The problem is that so far it has not been possible to forward the audio track in any way, there is only video. The manual for the camera did not help, there is no such information in it.
If anyone has come across this issue, I would appreciate your help.

Answer 1

There are quite adequate guys in the D-Link support, have you tried calling them? And even better is the congresses to them .... the branch network in Russia is very developed, in almost any large city.
ps In general, D-link compares favorably with cool brands like Cisco, HP, etc. the fact that he has a free support.