CAP_PROP_LRF_HAS_KEY_FRAME = 67, 仅FFmpeg后端 - 指示最后一个原始帧(LRF),当VideoCapture初始化为VideoCapture::open(CAP_FFMPEG, {CAP_PROP_FORMAT, -1})或在第一次调用VideoCapture::read()之前调用VideoCapture::set(CAP_PROP_FORMAT,-1)时,输出是否包含关键帧的编码数据。 CAP_PROP_CODEC_EXTRADATA_I...
int current_framePos = capture.get(CV_CAP_PROP_POS_FRAMES);//当你移动滑动条,触发回调函数,会重新设置帧数,然后这里会读取你设置的帧数位置,读取这个位置的一帧图像 sprintf(strfps2, "rate%d", current_framePos);//格式化帧数字符串 setTrackbarPos("Frame", "Video", current_framePos);//设置滑动条...
CV_CAP_PROP_POS_FRAMES //将被下一步解压/获取的帧索引,以0为起点 CV_CAP_PROP_POS_AVI_RATIO //视频文件的相对位置(0 - 影片的开始,1 - 影片的结尾) CV_CAP_PROP_FRAME_WIDTH //视频流中的帧宽度 CV_CAP_PROP_FRAME_HEIGHT //视频流中的帧高度 CV_CAP_PROP_FPS //帧率 CV_CAP_PROP_FOURCC /...
usingnamespacecv; usingnamespacestd; //保存avi视频文件 voidmain(){ VideoCapture cap; cap.open("d:\\input.avi"); Size sizeReturn =Size(cap.get(CV_CAP_PROP_FRAME_WIDTH),cap.get(CV_CAP_PROP_FRAME_HEIGHT)); VideoWriterwriter("d:\\output.avi",cv::VideoWriter::fourcc('M','J','P','...
1. CV_CAP_PROP_POS_FRAMES 0-based index of the frame to be decoded/captured next. 2. CV_CAP_PROP_POS_AVI_RATIO Relative position of the video file 3. CV_CAP_PROP_FRAME_WIDTH Width of the frames in thevideo stream. 4. CV_CAP_PROP_FRAME_HEIGHT Height of the frames in the video ...
cv2.CAP_PROP_POS_AVI_RATIO:视频文件的相对位置(0表示开始,1表示结束) cv2.CAP_PROP_FRAME_WIDTH:视频流的帧宽度。 cv2.CAP_PROP_FRAME_HEIGHT: 视频流的帧高度。 cv2.CAP_PROP_FPS: 帧率 cv2.CAP_PROP_FOURCC: 编解码器四字符代码 cv2.CAP_PROP_FRAME_COUNT: 视频文件的帧数 ...
1 - cv2.CAP_PROP_POS_FRAMES:从0开始索引帧,帧位置; 2 - cv2.CAP_PROP_POS_AVI_RATIO:视频文件的相对位置(0表示开始,1表示结束); 3 - cv2.CAP_PROP_FRAME_WIDTH:视频流的帧宽度; 4 - cv2.CAP_PROP_FRAME_HEIGHT: 视频流的帧高度; 5 - cv2.CAP_PROP_FPS:帧率; ...
cap.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH,1280) cap.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT,1024) cap.set(cv2.cv.CV_CAP_PROP_EXPOSURE,0.1) while True: ret,img= cap.read() cv2.imshow("input", img)#cv2.imshow("thresholded", imgray*thresh2) ...
3. CV_CAP_PROP_FRAME_WIDTH Width of the frames in the video stream. 4. CV_CAP_PROP_FRAME_HEIGHT Height of the frames in the video stream. 5. CV_CAP_PROP_FPS Frame rate. 6. CV_CAP_PROP_FOURCC 4-character code of codec.
size=(int(capture.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)),int(capture.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT)))#cv_fourcc值要设置对,不然无法写入,而且不报错,坑 video=cv2.VideoWriter("VideoTest.avi",cv2.cv.CV_FOURCC('I','4','2','0'),30,size)#isopened可以查看摄像头是否开启 ...