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  1. 3D & Motion Graphics
  2. Blender
Cgi

4 Points Planar Tracking in Blender

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Difficulty:IntermediateLength:ShortLanguages:

Preview

1. Tracking the Footage

Step 1

Open Blender.

Open Blender
Open Blender

Step 2

Click on Editor and select Movie Clip Editor.

Movie Clip Editor
Movie Clip Editor

Step 3

It opens the Movie Clip Editor. Click on Open to import the footage in the movie clip editor.

Movie Clip Editor
Movie Clip Editor

Step 4

Go to the folder with the image sequence of the footage. Select the first frame and click the Open Clip button.

Open Clip
Open Clip

Step 5

Now you can see the footage inside the movie clip editor window. 

Click on Prefetch Frames button to load the image sequence in the RAM. Alternatively, you can press the P key.

Prefetch Frames
Prefetch Frames

Step 6

Press and hold the Ctrl key and secondary-click the mouse button onto the marker. A tracker appears on the footage.

Tracker
Tracker

Step 7

Following the same way, create trackers for the rest markers also.

4 Trackers
4 Trackers

Step 8

Click on Track Forward button to track the footage.

Track Forward
Track Forward

Step 9

Within a couple of seconds, the footage gets tracked. You can play the footage to check the reliability of the track. In my case, the footage has been tracked without any problem.

Tracked Footage
Tracked Footage

2. Creating Plane Track

Step 1

Click on Solve tab.

Solve
Solve

Step 2

Press the A key twice to select all trackers in the viewport. Go to Plane Track and click on Create Plane Track.

Create Plane Track
Create Plane Track

Step 3

It creates a plane track inside the viewport.

Create Plane Track
Create Plane Track

Step 4

Move the control points of the plane track at the corners of the monitor. 

Control Points
Control Points

3. Compositing in Node Editor

Step 1

Click on Editor and select Node Editor.

Node Editor
Node Editor

Step 2

Turn on Use Nodes and Backdrop options.

Use Nodes and Backdrop options
Use Nodes and Backdrop options

Step 3

Press Shift-A key and go to Input > Movie Clip.

Movie Clip
Movie Clip

Step 4

With Ctrl and Shift key pressed, click on the Movie Clip node. It automatically gets connected to the Viewer node.

Viewer Node
Viewer Node

Step 5

Click on Browse Movie button and select the image sequence.

Browse Movie
Browse Movie

Step 6

Press Shift-A key again and go to Input > Movie Clip to create a new Movie Clip node.

Movie Clip node
Movie Clip node

Step 7

I want a movie clip to play on the monitor screen. So, I have chosen a movie file. If you want to place just an image, create an Image node instead of the Movie Clip node and then choose a still image of your choice.

Movie Clip node
Movie Clip node

Step 8

To place the movie file on the top of the monitor, press Shift-A key again and go to Color > Alpha Over.

Alpha Over
Alpha Over

Step 9

Connect the Alpha Over node with the monitor movie clip node.

Alpha Over connection
Alpha Over connection

Step 10

Connect the second movie clip node’s image output to the Alpha Over node’s image input.

Alpha Over connection
Alpha Over connection

Step 11

Press Shift-A key again and go to Distort > Plane Track Deform.

Plane Track Deform
Plane Track Deform

Step 12

Connect the Plane Track Deform node to the second Movie Clip node.

Plane Track Deform
Plane Track Deform

Step 13

Click on Open and select the monitor sequence file. Click on Camera and select the camera. At last, click on Plane Track and select the plane track.

Plane Track
Plane Track 

Step 14

As soon as you select the plane track, you will see the movie file gets fit in the monitor. 

Press the Play button and you will see the foreground movie going perfectly with the background footage.

Play
Play 

Conclusion

In this part of the tutorial series, I showed you how to create four-points planar tracking. In the next part of the tutorial, I will show how to perform 3D tracking.


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