I am currently extracting frames from a video so I can add some bounding boxes in each frame. Then, I want to put all the frames together and make a new video, using openCV. The problem is that every time I want to do that, I have to extract thousand of frames first. Is there a way to do it without having to extract the frames? Thanks

CodePudding user response：

That assumption isn't correct. You can use OpenCV's VideoCapture to load a video, get a frame, do some processing on it and save it using a VideoWriter object - one frame at a time. There is no need to load all frames into memory and then store them all at once.