Performance of video rendering in Capture application

Performance of video rendering in Capture application
-------------------------------------------------------------------------------
I am loading the COM environment for every graph building;
Loading of COM environment and releasing of an environment done by CoInitialize() fn and
CoUninitialize() fn;
it takes much time to render the video in Recorder application ( loading of COM environment every time takes much time);
if I am loading the COM environment everytime that takes much time but if I am loading the COM
environment only once that makes the rendering of video so fast compare to everytime loading of
COM environment;