Effect of throwing sunglasses onto a face

[Shahid shahan]

If you are trying to hide a string from a video where it is in front of the face, you could use a technique called rotoscoping. Rotoscoping is a process where you manually trace around an object or area in each frame of a video, and then use the traced shape to create a matte or mask that isolates that area from the rest of the video.

To use rotoscoping to hide a string in front of a face, you would first need to import your video into a video editing or compositing software that supports rotoscoping, such as Adobe After Effects or Nuke. Then, you would need to create a shape that covers the string in each frame of the video where it is visible in front of the face. This could involve creating multiple shapes to account for any changes in lighting or movement in the video.

Once you have traced the string in each frame, you can use the shape or shapes to create a matte or mask that isolates the area of the video that you want to keep, while hiding the string. You can then place the isolated area on top of a new background or layer, or composite it back into the original video.

Keep in mind that rotoscoping can be a time-consuming and tedious process, especially for longer videos or more complex shapes. However, with patience and attention to detail, you can achieve a seamless result that hides the string effectively.