  Assistive technology is a prerequisite for making a high-quality lecture
video. It is therefore imperative to edit the lecture video after recording. In
this study, we aim to reduce the cumbersome task of lecture video editing by
developing a system that enables the addition of visual effects in the video
while recording. In particular, we use augmented reality (AR) technology to
digitize and display in real-time lecture materials, assistant agents, and
other recording contents used by the lecturer. Our system realizes such a
mechanism as a lecture recording environment. In addition, our system based on
AR technology can support the work of the lecturer, which is difficult to do by
oneself while conducting the lecture, using the information of the lecturer's
position and the progress of the lecture. We evaluated the system functionality
and performance, and verified the system's correct behavior. If the burden of
making lecture videos can be reduced, the lecturer will be able to devote more
time to improving the quality of lecture contents, which is expected to
contribute to the improvement of lectures.
