timewarp motion blur

[Reloaded]

Hi there.
There is a video tutorial at Andrew Kramer’s site that shows how to create a matte for a video. It’s a suicide movie, I know you are creating a very different comp from the one at the video, but maybe the part of the Matte (very good) helps you. Here is the link https://www.videocopilot.net/videotutorials/suicide/index.htm

[Alex Harding]

sorry, i already have the matte made, the problem im having is that the matte doesn’t seem to make any diference to the timewarp effect, regardless of the “matte layer” settings

[Jack Binks]

Hi there,

The matte input to timewarp is to do with segmenting the image for motion estimation purposes (essentially use the matte to define the foreground object with different motion so as to help prevent artefacts which may otherwise be introduced). If you’re looking to only affect a particular part of the image use the matte as a trackmatte to laer the moblurred part of the image over the original.

HTH
Jack

The Foundry, UK

[Peter Litwinowicz]

[Jack@TheFoundry] “If you’re looking to only affect a particular part of the image use the matte as a trackmatte to laer the moblurred part of the image over the original.”

So what you are saying is that there are two options:
1) matte the original object and motion blur just the object and place over the original footage. In this case, you’ll see the motion blurred edge over the original non-motion blurred edge of the object after the composite is done.
OR
2) track matte after motion blurrring, in which case the motion blur will not affect the edge of the object being blurred.

FYI, Our ReelSmart Motion Blur Pro ( https://www.revisionfx.com/mblur.htm ) allows you to apply a motion blur to each of 2 layers individually (using a matte, just like TimeWarp). In the case of applying motion blur to the front object only, RSMB will first fill in the hole in the background automatically, blur the front object and internally composite the blurred front object over the filled-hole background. Note that this creates a different kind of artifact (the filling process is not perfect either 🙂 ), but often produces a less objectionable result. Your mileage may vary.

Pete Litwinowicz
https://www.revisionfx.com