要使用cv2.CAP_PROP_POS_FRAMES提取视频帧,可以按照以下步骤进行操作: 导入OpenCV库:import cv2 打开视频文件:video = cv2.VideoCapture('video.mp4')这里的'video.mp4'是视频文件的路径,可以根据实际情况进行修改。 设置要提取的帧位置:frame_position = 100 # 设置要提取的帧位置,这里以100帧为例 vid...
我记得之前我粗略写过I帧的判断：H264编码NALU结构介绍与I帧判断方法，但也是粗略的写了一下，本篇文章...
使用OpenCV 2.x 时,代码应按以下格式编写: post_frame = cap.get(cv2.cv.CV_CAP_PROP_POS_FRAMES) 从opencv 3.0.0-dev python bindings not working properly,我知道 cv2.cv 子模块在 opencv3.0 中被删除,一些常量也被更改 但是cv2.CV_CAP_PROP_POS_FRAMES 对我不起作用,那我该怎么办? shady 尝试输入...
get(cv2.CAP_PROP_FPS) * time) + self.search_switch(cap, key, thresh) number_of_frames = max(number_of_frames, 0) number_of_frames = min(number_of_frames, cap.get(cv2.CAP_PROP_FRAME_COUNT)) cap.set(cv2.CAP_PROP_POS_FRAMES, number_of_frames) return number_of_frames ...
在上述代码中,cap.get(CV_CAP_PROP_FRAME_WIDTH)将返回视频帧的宽度值。 enumVideoCaptureProperties {CAP_PROP_POS_MSEC=0,//!< Current position of the video file in milliseconds.CAP_PROP_POS_FRAMES=1,//!< 0-based index of the frame to be decoded/captured next.CAP_PROP_POS_AVI_RATIO=2,/...
其中ret是布尔值,如果读取帧是正确的则返回True,如果文件读取到结尾,它的返回值就为False。frame就是每一帧的图像,是个三维矩阵。 读取某一帧图片 cap.set(cv2.CAP_PROP_POS_FRAMES,50) #设置要获取的帧号,这是第51帧(下标从0开始) ret, frame = cap.read() #读取一帧图像好...
问OpenCV在使用cap.set时变得非常慢(cv2.CAP_PROP_POS_FRAMES)EN我在python3和opencv-python 4.5.5....
Beginning with the latest version, no access to frame size or positioning is possible. Setter methods will return False, getter will return 0.0. CAP_PROP_FRAME_COUNT returns -1 Version 3.4.1 runs perfectly System information (version) Op...
Example and confirmed effect: http://answers.opencv.org/question/162781/videocaptureset-cap_prop_pos_frames-framenumber-not-exact-in-opencv-32-with-ffmpeg/
System Information Name: opencv-python Version: 4.8.0.76 System: Ubuntu 20.04 Python Version: 3.11.9 Detailed description I use cap.set(cv2.CAP_PROP_POS_FRAMES, start_frame) to jump to the 360th frame, with a frame rate of 60, which is 6...