Public bug reported:
Binary package hint: blender
Nodes editor gives an option to combine the current scene and an image
of movie file so that there is a node from both to a vectorblur filter.
It is usually much faster way to get the end result than the normal
mblur (motion blur).
When rendering single images everything goes just fine, but usually
movie files are getting black. Blender renders first the current scene
and after that the image is added (black) and blurred. There was a
similar problem in windows, but at the moment it seems to work in that
environment.
Short tutorial to replicate the bug
Make an animation;) and save it. (Dont' erase the current scene or quit
blender.)
Open the Node editor.
Press the Composite Nodes button (the face), and select Use Nodes. Boxes for
render layer and composite result appear.
Add/input/image.
Add/filter/vectorblur.
Connect image box's "image" to vectorblur's "image".
Press f10 and select Render Layer. Press the blue box "Vec" and in the upper
working space Render Layer gets a Speed output. Connect it to Vector Blur's
Speed as well as Z to Z.
Now, connect Vector Blur's Image to Composite's Image.
Make sure to change the name of the Output file - you might want to keep
your original animation without vectorblur (or overall black view).
In the animation panel select Do Composite, then Anim.
** Affects: blender (Ubuntu)
Importance: Undecided
Status: New
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Vectorblur does not work with input movies
https://bugs.launchpad.net/bugs/184471
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