To calculate keyframe tracks:
1. | In the Tracker properties panel, select each track you wish to calculate in the Tracks list or click select all. |
2. | For each track, select the type of movement the track is intended to output: translation, rotation, or scaling. For example, tracking a feature across the sequence and toward the camera may involve translation and scale. |
3. | Scrub through the sequence a few frames and adjust the position of the tracking anchor by dragging the anchor to the location of the pattern. You can use the zoom window to fine-tune your positioning. Continue on through the sequence as required. |
TIP: You can change the magnification of zoom windows by holding Shift and dragging the magnifying glass cursor away from the center of the window.
At each frame, a new keyframe window is added to the right of the zoom window. The keyframe closest to the current playhead frame is highlighted in orange.
It’s a good idea to place more keyframes around areas of complexity or greater movement and fewer on straight forward translation. Generally speaking, a greater number of keyframes produces a better track, but at the expense of processing time.
4. | When you’re satisfied with your keyframes, make sure all your tracks are selected in the Tracks list and then click to track all keyframes. |
TIP: When calculating multiple tracks simultaneously, you may find that some tracks stick accurately to the pattern, while others require resetting and reanalysis. When you’re happy with a given track, deselect it in the Tracks list. This protects it from recalculation, and lets you experiment with better placement for the wayward tracks.
5. | You can also force the selected tracks to recalculate between the two nearest keyframes by clicking in the Viewer toolbar. |
See Troubleshooting Keyframe Tracks for help with troublesome tracks.