Correct the time unit

Be sure to set your time unit before tracking. If you forget, you can fix your tracked points by rescaling the times of the keys in the graph editor.

Choose between two methods to reset the time scale.

Method 1

1. Change to the desired Time scale in the Settings category of the Preferences window ( Window > Settings/Preferences > Preferences).
2. In the Track control panel, click the Select All button.
3. In the channel box, select all fields that appear green (meaning they are animated values).
4. Select Edit > Keys > Scale Keys > .
5. In the Scale Keys Options dialog, enter the following settings:
   • Channels - Select From Channel Box
   • Time Range - Select All
   • Time Scale/Pivot - In the Time Scale field, enter the value obtained when you divide the current frame rate by the target frame rate. For example, if you want to scale from 24 fps to 30 fps, the value is 0.8. In the Time Pivot field, leave the value at 0.00.
6. After you have rescaled, run Solve again.

Method 2

1. Leaving the Time unit setting alone, save the scene, then click Save As to a Maya ASCII file.
2. Open a new scene to clear the memory.
3. In a text editor, open the ASCII scene file and find the heading "CurrentUnit" near the top of the file.
4. Change the -t flag to one of the following time units: film, game, ntsc, ntscf, pal, palf, or show.

   Each time unit name represents a certain speed:

   film is 24 fps	pal is 25 fps
   game is 15 fps	palf is 50 fps
   ntsc is 30 fps	show is 48 fps
   ntscf is 60 fps

5. Save changes to the ASCII file.
6. Reopen the ASCII scene file in Maya Live.

   When you do, the track points and all solutions are scaled to the new time unit.

Correcting the filmback setting

If you forget to set the filmback, you can fix your tracked points by rescaling the values of the keys in the graph editor.

To adjust track point scaling for a new filmback

1. Change to the desired filmback settings in the Setup control panel.
2. In the Track control panel, click the Select All button.
3. In the channel box, select the LocationX attribute.
4. Select Edit > Keys > Scale Keys > .
5. In the Scale Keys Options dialog, enter the following settings:
   • Channels - Select From Channel Box
   • Time Range - Select All
   • Time Scale/Pivot - In the Time Scale field, enter 1.0 to keep the time scale as is. Leave Time Pivot at 0.0.
   • Value Scale/Pivot - In the Value Scale field, enter the value obtained when you divide the current film aperture width into the target width. For example, if you want to scale from 1.481 to 1.333 (NTSC video), the value is 0.9. Leave Value Pivot at 0.00.
6. To see your change in the view panel, refresh the screen.
7. After you have rescaled, run Solve again.