RtpSession dynamically attach/dettach sender bin

[Maksim Danilov]

Good afternoon. Im working with pipeline that receives and sends media over network. I have two states: passive (only receiving) and active (sendrecv). When I attach sender for example after one minute, the mfvideosrc element generates pts after that time. However, it should start at 0. How can I make it? Should I use a new clock or send some event?