时间：2020-11-03 13:46:33 | 栏目：C代码 | 点击：次
记录一个基于C++实现的将视频流帧转换为图片
/* avi2jpg 函数，将摄像头当前帧保存为jpg格式照片 */
void Video_to_image(CvCapture* capture)
{
//初始化一个视频文件捕捉器
//CvCapture* capture = cvCaptureFromAVI(filename);
//获取视频信息
cvQueryFrame(capture);
/*
int frameH = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);
int frameW = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);
int fps = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);
int numFrames = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
//printf("tvideo height : %dntvideo width : %dntfps : %dntframe numbers : %dn", frameH, frameW, fps, numFrames);
*/
//定义和初始化变量
int i = 0;
IplImage* img = 0;
char image_name[13] = "1";
//读取和显示
while(1)
{
img = cvQueryFrame(capture); //获取一帧图片
char key = cvWaitKey(20);
sprintf(image_name, "%s%d%s", "image", ++i, ".jpg");//保存的图片名
cvSaveImage( image_name, img); //保存一帧图片
if(i == NUM_FRAME) break;
}
}