- 打开视频,获取视频的基本信息和第一帧
- 用户通过截取矩形,截取ROI感兴趣区,点击确定合成新的只有感兴趣区的视频
- 帧固定大小放置在窗口,简单的截取会导致图片失真,所以实际获取的坐标为按照比例,在真实图片上的坐标
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QT+Opencv实现对视频的ROI区域的截取(保存为新的视频)
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