Michael Yates shares his unique Image Sequence Blendshape Baker script for Autodesk Maya which will allow you to bake out an animated texture sequence and use it to control and animate a blendShape.
Bake an animated, projected or procedural texture to the UV’s of an object as an image sequence
Image Sequence Blendshape Baker provides a panel allowing you to set the object, texture and the blendShape Object along with a frame range and format. Michael notes that you could also use it to bake out another sequence as a luminance map to animate the strength of a blendshape on an object with the same UV’s. Check out the Maya Image Sequence Blendshape Baker here.