Virtual camera system are incapable of being used in video games.
  In computing subsequent suggested virtual camera shots, the system analyzes the visual compositions and editing patterns of prior recorded shots to compute suggested camera shots that conform to continuity conventions such as not crossing the line of action, match placement of virtual characters so they appear to look at one another across cuts, and favors those shots which the human operator had previously used in sequence
Video systems vary in display resolution, aspect ratio, refresh rate, color capabilities and other qualities

