how do you...
Out of context: Reply #1
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- detritus0
I don't know exactly about the software, but if you could find stock b&w footage of smoke billowing (cigarette-like), which is constrained horizontally (ie. just flows upwards, not outwards), you could mimic that effect.
You'd need to flip the video clip on its side then duplicate vertically three times - offsetting each's timeline so they don't play in sync. Then align the group to the left of the screen, so when they play, the smoke billows from left to centre. Then, copy the group and flip horizontally, so that you have another 4 horizontal streams on the right hand side. These would then need to play backwards, so that the smoke reverse-billows from centre to right. Beyond that, you'd need to play with some O shaped opacity mask in the centre, and have all the smoke videos set to Overlay, or Screen - or whatever layer options you have in video programs. You'd probably want a colour layer in there too.
That's how I'd try and do it - hope that all makes sense.