Lip Syncing Process

Step 1: Make a Flash document with a green background and a dot depicting where the tracking dot will be.

Step 2: Draw and animate the facial features while always covering the tracking dot.

Step 3: Open up the stop-motion scene on After Effects.

Step 4: Export the facial animation from Flash as an image sequence and import onto After Effects (make sure you change the frame-rate to your preferred fps by right-clicking and then clicking Interpret Footage). After that, you just remove the green background by changing the screen colour to the same shade of green on the Keylight menu.

Step 5: Create a Null Object and place its centre point over the tracking dot.

Step 6: Open the tracking menu, place the Track Point over the tracking dot, and edit the Motion Target to the Null Object. Then click the buttons next to Analyse and if the Track Point moves the way you want it, click apply.

Step 7: Make sure the facial features cover the tracking dot and are aligned well with the null object, and then parent the facial animation with the null object.

Final Step: Look through the footage and make sure it syncs up well, and that it covers the tracking dot the whole time, before rendering it. You can edit the path of the Track Point in the tracking menu, plus you can resize and move the facial animation but it won't affect the tracking at all.