The video is encoded using xvid MPEG-4 codec http://www.xvid.org and the executables 
for the 64-bit for windows 7, is obtained from http://ffdshow.faireal.net/mirror/XviD/.

Sliding window-based evaluation of a test sequence (ball_valve_test_video.avi) belonging to 
the subject 2 is provided. The online accuracy is presented (section 5) as our system is 
targeted for the live activity recognition i.e. the observation from 
beginning to the current window. The activity prediction is shown in three colors: (1) Green 
for correct prediction, (2) Red for incorrect and (3) Blue for synchronization error. The 
synchronization error describes the current activity is often labeled as the prvious or 
the next activity. This is mainly due to the manual assignment of labels while preparing 
ground-truth, since it is difficult for humans to assign boundaries consistently 
between consecutive activities. 

NB: one can see the wrist markers in the video. The existing method [4] uses these markers 
for the detection and tracking of wrists.