Change Frame Rate via ffdshow filter

Is it possible to use ffdshow filter to change frame rate in a Directshow graph before running the graph? If so, where is the setting or interface method for it? Thanks!

The simplest way to arbitrarily change the framerate is through the avisynth script filter; use AssumeFPS or any other fps converter to change the output timestamps. This only works in ffdshow tryouts.

Is there a way within ffdshow of changing the video frame rate? I did actually use AssumeFPS within AviSynth, and it slowed it down but not to the desired framerate. I haven't updated ffdshow in a while though.