hi there,
david and me just noticed some interesting:
it seems that there is a different behaviour if you start vvvv by doubleclick on a patch or by drag.n.drop of patch into another one.
we are able to reproduce this here.
vvvv was started by doubleklick on my (patch) v4p. i was able to load video successful. but only only if the subpatch, containing the filestream node, was not hidden.
I was started by dragging into a running vvvv. I failed to open a Video.
furthermore since beta20 (didn’t have this with 17) i have a sneaking suspicion that in the frist frame of evaluation the content of a subpatches input is evaluted although this pin is connected to another node´s outlet.
another interesting thing is that the filestream´s file inlet seems to make problems to the directshowgraph if it is not referenced to a valid file.