I wish to pause and unpause video transmission in video call on fly without dropping Audio call using Android Pjsua2 library. But some how i am not able to understand how to implement that feature to sample android pjsua2 app. Any help would be highly appreciated. i went through below documentation and not able to understand ..how to implement it enum pjsua_call_vid_strm_op This enumeration represents video stream operation on a call. PJSUA_CALL_VID_STRM_START_TRANSMIT Start transmitting video stream. This will cause previously stopped stream to start transmitting again. Note that no re-INVITE/UPDATE is to be transmitted to remote since this operation only operates on local stream. PJSUA_CALL_VID_STRM_STOP_TRANSMIT Stop transmitting video stream. This will cause the stream to be paused in TX direction, causing it to stop sending any video packets. No re-INVITE/UPDATE is to be transmitted to remote with this operation. link documentation <https://www.pjsip.org/docs/2.2.1/pjsip/docs/html/group__PJSUA__LIB__CALL.htm#ga8a7b29df0618360407b8aae888421a36>