you could probably get pretty close with by animating the positions of the 2 clips and throwing directional blur (or a blur that can be constrained to horizontal or vertical, like fast blur) on an adjustment layer over the clips…
to make things easier i’d parent clip2 to clip1 (assuming clip1 is the first clip in the transition). this will make it so you only have to keyframe the position of clip1, rather than both clips, making it easier to tweak. then position clip2 just off the screen (if you were swishing from left to right, position clip2 to the right of the screen).
now animate the position move for clip1 to move off screen, opposite the position of clip2 (if clip2 is off screen right, animate clip1 off screen left). this should move clip2 on screen. you may want to use easy ease on the position keyframes (select the keyframes, choose animation>keyframe assistant>easy ease. then enable motion blur for the layers and for the preview and preview what you have.
i doubt that will be enough motion blur… to get more, fake it with directional blur, or if the movement is horizontal or vertical, fast blur may be easier. add and adjustment layer over the two clips then add the blur you want. adjust the direction and keyframe a blur value to go from 0 at the beginning of the move, to the blur amount that seems appropriate in the middle, then back to 0 at the end of the move.
something like that should get you close.
you could try to create a faster, more aggressive move, by trying motion tile on both clips and animating the ’tile center’ property at a fast pace, then just animate the opacity of on clip to the next. motion tile will work with ae’s native motion blur, so if the tile center moves rapidly, you should get a lot of blur and you can use motion tile’s mirror edges to make the move a bit more seamless.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW