改变视频的帧率，需要用到opencv。不依赖播放器，直接改变视频文件本身的帧率。-Change the video frame rate, need to use opencv. Do not rely on the player, the video file directly to change their frame rate.

打开电脑摄像头录像，对每一帧进行灰度处理，并打上logo,初学者学习opencv可以参考-Turn on the computer video camera, gray scale processing for each frame, and marked with logo, beginners can refer to learning opencv

This project for OpenCV I make it to increase or decrease the contrast of a video using OpenCV C++ It can change the contrast for each and every frame of the video.-This is project for OpenCV I make it to increase or decrease the contrast of