In the image recorded with a SLR camera, I found that there was the sound of the lens automatically focusing. To eliminate the focusing noise through post-processing requires very high-end equipment and skills. The gain outweighs the loss. Professional filming such as TV dramas and TV news productions do not choose such post-processing. Common solutions include: 1. Re-dubbing, recording, and synthesis; 2. Choose other sounds, such as music, etc., and replace the original recording in post-production; 3. Use an external microphone away from the camera for on-site recording when shooting; 4. Avoid Zoom, focus, or use a silent lens when shooting.

Hope to adopt.