Hi Alain, Thank you very much for the pointer; that's a very helpful insight! One question: On 12/15/2011 07:30 AM, Alain Totouom wrote: > [...] > 2. create your custom (playback) port with the needed callbacks > put_frame/get_frame/on_destroy.... How do I go about this? Is there an existing port type I am unaware of that allows me to supply these callbacks as arguments, or do I have to create one in the PJMEDIA source? Thanks, -- Alex Balashov - Principal Evariste Systems LLC 260 Peachtree Street NW Suite 2200 Atlanta, GA 30303 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/