How does pr realize that a normal speed video suddenly becomes slow motion and then continues to return to normal speed?

1. Open pr first, and then double-click the blank position of the project panel in the lower left corner to import the video.

2. Drag the imported video to the timeline panel on the right.

3. Click to select video on the timeline, and then click the right arrow in the upper left corner to select the effect control.

4. At this time, move the time axis to the position where the lens will start to slow down.

5. Then click the code table in front of the time replay speed to set the first key frame.

6. In the same way, move to the last frame position where the lens slows down, set the second key frame, and then click the arrow in front of the speed.

7. At this time, put the mouse cursor on the speed line between the two key frames just set, press the left mouse button and pull it down, and the speed on the left side will decrease until you are satisfied.

8. As shown in the figure below, set it to the minimum speed, and then click the right mouse button on the timeline video to select time interpolation and optical flow method.

9. Click on the sequence at the top of the interface to render the effect from the in point to the out point.

10, at this time, the rendering time will be longer, just wait quietly, and you can see the slow motion just set after the rendering is completed.

1 1, the final effect is as follows. If you don't understand, go to the self-study website to search for tutorials.