Can any body explain me following    If my pipeline consist of filesrc --> demuxer -->.....   I want to demuxer to pull data from filesrc (which will open file) any data i.e random access..  How communication establish initially... if my demuxer's sink pad are scheduling in pull base mode then is it filesrc  will open file and push initial data to demuxer ,then afterward demuxer pull data from filesrc                                  or  is it my demuxer who will request filesrc to open file  i.e.   Is  everything will start from demuxer... who will first request filesrc to open file and afterward access it.. ?    One more thing ....in either case filesrc will open file....is it anyway possible to get me  file handle (return by fopen() ) in next element i.e inside demuxer where demuxer will use that handle to do some more activity... :) Thank you very much...have very nice day .. :) -- Thanks and warm Regards Rahul S. Nikose 09739949798