using System;
using System.IO;
using OpenCvSharp;
class Program
{
static void Main(string[] args)
{
// 视频文件路径
string videoPath = @"I:\OpenCvSharp学习\cylindrical.avi";
// 输出图片的目录
string outputFolder = @"I:\OpenCvSharp学习\output_frames";
if (!Directory.Exists(outputFolder))
{
Directory.CreateDirectory(outputFolder);
}
using (var capture = new VideoCapture(videoPath))
{
if (!capture.IsOpened())
{
Console.WriteLine("无法打开视频文件");
return;
}
int frameCount = (int)capture.Get(CapProp.FrameCount); // 获取视频总帧数
for (int i = 0; i < frameCount; i++)
{
Mat frame = new Mat();
capture.Read(frame);
if (frame.Empty())
{
break;
}
// 每隔一帧保存图片(此处修改为每20帧保存一次)
if (i % 20 == 0)
{
string outputPath = Path.Combine(outputFolder, $"frame_{i:D5}.jpg"); // 格式化输出文件名
Cv2.ImWrite(outputPath, frame);
Console.WriteLine($"已保存第 {i} 帧到:{outputPath}");
}
}
}
Console.WriteLine("视频转图片完成。按任意键退出...");
Console.ReadKey();
}
}
c#把bitmap格式转换为其他格式图片
2024-01-23 15:20:01 37 阅读