LA Noire has some amazing tech for face animations. Basically actors are filmed from multiple cameras and resulting movies are converted to a keyframed animation and animated textures. All the textures are captured in neutral lighting conditions, so usually lighting doesn’t fit in game environment. Looks like that those textures are animated at around 3 frames per second. Eyes are animated separately and at higher rate. This approach has also some interesting “artifacts”, as it’s impossible to capture everything during one day. For example you can see as hair shifts and changes when blending between two performances captured at different days:
More info:
LA Noire face tech animation trailer
LA Noir tech description by IQGamer
MotionScan website