OpenCvSharp4库是一个基于.Net封装的OpenCV库,Github源代码地址为:https://github.com/shimat/opencvsharp,里面有关于Windows下安装OpenCvSharp4库
的描述,如下图所示:
视频资源可以到https://github.com/murtazahassan/Learn-OpenCV-in-3-hours/blob/master/Resources/test_video.mp4下载
C#示例代码如下,如下代码展示了怎么使用VideoCapture和Cv2.ImShow读取本地视频:
using OpenCvSharp;
using System;
namespace OpenCVExample
{
public class Program
{
/// <summary>
/// 读取本地视频并逐帧显示
/// </summary>
public static void ReadLocalVideo()
{
VideoCapture cap = new VideoCapture("Resources\\test_video.mp4"); // 读取本地视频文件
if (!cap.IsOpened())
{
Console.WriteLine("VidepCapture open failed");
return;
}
while (true)
{ // 如果cap初始化成功
Mat frame = new Mat();
if (cap.Read(frame)) // 抓取和解码,返回下一帧
{
Cv2.ImShow("video Result", frame);
if (Cv2.WaitKey(1) == (int)('q')) // 用户输入q键退出
{
break;
}
}
else
{
// 当视频播放完毕,也退出
Console.WriteLine("there is no frame to read");
break;
}
}
}
static void Main(string[] args)
{
ReadLocalVideo();
//Console.ReadKey();
}
}
}
程序运行结果如下图所示: