How to set up nodes to use vector blur with a seq of images ?

Hi , i want to use vector blur with a seq of images ,

i know this is posible but i forgot how to set it up

so , do you know how to set up the nodes to use vector blur with a sequence of png images ?

thNX !

anyone please ?

For vector blur you need a speed value to calculate it. You don’t have such a value in just a rendered png file.
http://wiki.blender.org/index.php/Doc:Reference/Windows/Nodes/Composite#Vector_.28Motion.29_Blur

It sounds like you are looking to simulate the “Force Motion Blur” function in After Effects. As I recall, this can’t be done with Blender vector blur node because images don’t have a Z buffer, so you can’t get the required Speed pass out of a sequence.

Edit: What Richard Marklew said, faster than me.

you would need to simulate speed and direction from estimates between frames, that would need motion detection. Not available in Blender at this time.