While many of the more pop

While many of the more popular pro/semi-pro programs will create these types of effects, you might consider some of the “pre-made” effects available, such as…

http://www.video100.com/showstoppersfx_weddingcollection03.html
http://www.animationsforvideo.com/html/hotcakes_we_vol1.htm
http://www.3dbackgrounds.com/wedding_animations.html

I’m sure the “falling petals” is amongst this group, or similar product.
(FYI… these are from a simple Google search for “wedding stock video”)

Hope this helps