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Export track points

Tracking

Solving

 

User Guide > Dynamics and Effects > Live > Tracking > 

Tracked point file format

The tracked point file must follow a specific format:

# Size [image width] [image height] [device aspect] # Pixels# Name [pointname] [pointnumber] [framenumber] [xlocation] [ylocation] [error]

# Size

If you are specifying coordinates in pixels, the first line must specify the image size in pixels. The device aspect is optional.

Device aspect = (image width/heigth) * pixel aspect ratio

# Pixels

If you are specifying coordinates in pixels, this must be the second line.

# Name

The first line of each point specifies its name.

pointnumber

The point number in this file. It should increment for each point.

framenumber

When you import points, Live adds this number to the Start Frame number to compute the frame number. Start Frame is specified in the Setup control panel.

xlocation, ylocation

Location in pixel coordinates or normalized coordinates.

If you use pixel coordinates, the X coordinate varies from 0 to the image width. The Y coordinate varies from 0 to the image height. The point 0, 0 is the bottom left of the image.

If you use normalized coordinates, the X coordinate varies from -a (left) to +a (right) where a = (image width/height) * pixel aspect ratio. The Y coordinate varies from -1 (bottom) to +1 (top).

error

This is an optional value measuring the tracking error. It ranges from 0 (a perfect match) to 1 (no match).

# Size 720 486

# Name left1

0 0 -0.7585931914 -0.5294952326 0

0 1 -0.7586799904 -0.5300096425 0.002832949162

0 2 -0.7585931849 -0.5313921014 0.01325005293

0 3 -0.7580434163 -0.5337390664 0.004410386086

0 4 -0.757522583 -0.5358931302 0.01897031069

0 5 -0.7574936478 -0.5389473998 0.01043349504

0 6 -0.7574936478 -0.5436413298 0.0144148469

0 7 -0.757204296 -0.550392873 0.01106923819

0 8 -0.7565966571 -0.5589769779 0.01841163635

0 9 -0.7534427219 -0.570551052 0.01649397612

0 10 -0.7526325367 -0.5828002804 0.01214426756

# Name left2

1 0 -0.7549460687 -0.085601414 0

1 1 -0.7552932739 -0.08663023646 0.005688428879

1 2 -0.7553800795 -0.0879483949 0.01128107309

1 3 -0.7542226721 -0.09007030848 0.005126774311

1 4 -0.7536439684 -0.09244942371 0.01110613346

1 5 -0.7534414221 -0.09543939284 0.01303964853

1 6 -0.7532967461 -0.1000047221 0.01685106754

1 7 -0.7530073943 -0.1064990636 0.01059484482

1 8 -0.7522840147 -0.1151796192 0.007831633091

1 9 -0.7516474406 -0.1260463887 0.006545543671

1 10 -0.7499402647 -0.1374597118 0.01393806934

# Name left3

2 0 -0.7504397714 0.2400678146 0

2 1 -0.7506134033 0.2385246371 0.01199233532

2 2 -0.7506134033 0.2374315301 0.01194387674

2 3 -0.749629607 0.2357918696 0.004064679146

2 4 -0.7487615515 0.2332520034 0.01138979197

2 5 -0.7486168755 0.2304227853 0.01261204481

2 6 -0.7484432644 0.2258896062 0.0166606307

2 7 -0.7481828478 0.2194917153 0.007826387882

2 8 -0.7475173385 0.211004061 0.004957020283

2 9 -0.7460416441 0.1997836392 0.007061779499

2 10 -0.7449131718 0.1893348223 0.0135897994