The size of 720 times 576 should be set in the settings before importing the video. Tick the box to automatically adapt to the size before transferring the time axis, re-create or output the video, and it is best to output avi.

Dynamic effect is a category of film recording, which simply refers to the sound effect of various actions, also called onomatopoeia. For example, in martial arts movies, the sound of fracture is made of celery, and the sound of rain is n kinds of weapons made of the sound of washing your face. As a qualified professional animator, it takes two or three years to train, and teaching alone can't achieve the goal. The master must practice one by one with his disciples.