Shake track files
All chosen tracks are exported as individual Track Files in order to be used as input for the Shake®MatchMove or Stabilize nodes. While these files only contain 2D information, the exported values are not simply the result of 2D tracking, but the
2D projection of the 3D reconstructed points. The main advantage is that the point coordinates are known even though a point
may move out of the image.
Shake script
MatchMover generates a Shake script containing the following information:
- Four point tracks that will be used as input data by a MatchMove node to perform corner pinning.
- A warping grid to apply distortion to your CG elements so they can integrate perfectly with distorted footage.
- A warping grip to remove distortion from the original footage.
The window controls for this export are quite different from the other ones. Unlike other exports formats, you cannot have
an arbitrary number of points. Shake controls require you have one, two, or four points for a matchmoving process.
Use the drop-down boxes to choose the points to export. The corner indications are only valid if you want to perform a four-point
corner pinning.
Point order is important: the arrow buttons swap points and let you reorder them.
Note
You can provide several sets of 4-points that will each generate a corresponding MatchMove node. Set the total number of sets
in the "Nb of sets" spin-box, and select the current one in the "Current set" spin-box.
Tip
The boxes contain initially the first four points in the selection, if any. Selecting your points of interest before calling
the export window will save you time and effort.
In Shake, load the script by selecting File > Open Script and choose your file.
The Node View then contains the following nodes:
- rzVideo is a "FileIn" node containing your video. You may edit the imageName if it is incorrect, which may happen if you are working not on the same computer that you used to run MatchMover.
- rzMatchMove is a "MatchMove" node containing all the information to perform your composition operation. Load another image or video,
connect it to the second input of the rzMatchMove node, then enable it by opening its properties, toggling the applyTransform parameter to active, and change the outputType to Over. You may also have to change the source X and Y positions if your source is of a different size of you want to crop it.
Note
If several sets of points have been provided, additional nodes will be numbered (e.g., rzMatchMover 2 ...).
- rzDistort is a "WarpX" node designed to apply distortion to any CG element before compositing it with your footage. If the latter has
no distortion at all, this node is no use to you and you can delete it safely. rzUndistort is a "WarpX" node designed to remove the distortion from the original footage.