FaceReader has serious problems analyzing the images from my camera and I am sure that both the position of the camera and the lighting are optimal.

The problem may be the aspect ratio of the video images. FaceReader does not support videos in widescreen format (16:9). The aspect ratio of the video images must be 4:3.

Check the settings of your camera. If you have video files in widescreen format, you can convert these with a program like VirtualDub. VirtualDub is Opensource software. You can download it for free from http://sourceforge.net.