Abstract: The computer aided scientific experiment is an important way to carry out the scientific research. Taking the analysis of the projectile motion video as an example, this paper describes the general procedure to analysis the recorded experiment video. We expect that this free open-source software can he used in both physics teaching and researching for high school and college students and teachers. It will be helpful by using this software to stir up the student＇s interests in explore the physics principles which hidden behind the physics experiments, and to extend the tool to analysis the experiment.

Key words: video analysis, open source software