視訊灰度化寫入（opencv）
阿新 • • 發佈：2018-12-10
platform：opencv 3.4.2 & vs 2017
#include<highgui.h> #include<cv.h> #include<stdio.h> using namespace std; int main() { /*視訊播放*/ cvNamedWindow("kris_in", CV_WINDOW_AUTOSIZE); CvCapture * capture = cvCreateFileCapture("ym.avi"); int n=0; IplImage * frame; while (1) { frame = cvQueryFrame(capture); if (!frame) { //scanf("%d", &n); break; } cvShowImage("kris_in", frame); char c = cvWaitKey(33); if (c == 27) break; } cvReleaseImage(&frame); cvDestroyWindow("kris_in"); cvReleaseCapture(&capture); CvCapture * capture1 = cvCreateFileCapture("ym.avi"); cvNamedWindow("grayVedio", CV_WINDOW_AUTOSIZE); printf("now vedio to gray!!!\n"); IplImage * bgr_frame = cvQueryFrame(capture1); /*獲取原視訊的fps與size*/ int fps = (int)cvGetCaptureProperty(capture1, CV_CAP_PROP_FPS); printf("fps=%d\n", fps); CvSize size = cvSize( (int)cvGetCaptureProperty(capture1, CV_CAP_PROP_FRAME_WIDTH), (int)cvGetCaptureProperty(capture1, CV_CAP_PROP_FRAME_HEIGHT) ); /*通過cvCreateVedioWriter設定輸出視訊的檔名字，壓縮編碼格式，fps,幀的大小*/ CvVideoWriter *writer = cvCreateVideoWriter( "ym_out_gray.avi", CV_FOURCC('x', 'v', 'i', 'd'), fps, size ); /*輸出幀*/ IplImage * logpolar_frame = cvCreateImage(size, IPL_DEPTH_8U, 1); while ((bgr_frame=cvQueryFrame(capture1))!=NULL) { n++; /* cvLogPolar(bgr_frame, logpolar_frame, CvPoint2D32f(bgr_frame->width/2 , bgr_frame->height/2 ), 40, CV_INTER_LINEAR + CV_WARP_FILL_OUTLIERS); */ /*把原幀灰度化*/ cvCvtColor(bgr_frame, logpolar_frame, CV_BGR2GRAY); /*寫入幀圖*/ cvWriteFrame(writer, logpolar_frame); /*顯示影象*/ cvShowImage("grayVedio", logpolar_frame); char c = cvWaitKey(fps); if (c == 27)break; } printf("%d\n", n); scanf("%d", &n); cvReleaseVideoWriter(&writer); cvReleaseCapture(&capture1); cvReleaseImage(&logpolar_frame); return 0; }