For patch 3/5 in v7 (63da6040 - winegstreamer: Better handle framerate):
I set fps_n and fps_d to 0 in SetInputType() and SetOutputType(), because according to PATCH 1, AvgTimePerFrame doesn't affect the output time length.
Also, I changed 3 files in this patch, do we keep all the 3 changes or only keep one of them?