Puh... I don´t think that I know how to create such complex stuff, but I was able to simulate one with Particle Illusions 3.
All you need was a picture like this one (it´s out of the Hellsing series):
After the typic PI stuff (setting parameters, custom particle form blah blah) it came pretty close to the original clip of the hellsing series. It was a static portal (no camera motion), but oh well... it was a portal!
Uhm... If your picture is a screenshot of a video. You could use it... Just a few effects and fine =P
If you have Particle Illusions 3, I could give you my "portal-default-presets-whatever" thing for your programs libary.