vidioc_s_cropstatic int vpfe_s_crop(struct file *file, void *priv, struct v4l2_crop *crop) { struct vpfe_device *vpfe_dev = video_drvdata(file); int ret = 0, max_height, max_width; v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_crop\n");...
HIGHGUI ERROR: V4L/V4L2: VIDIOC_S_CROP OpenCV Error: Assertion failed (size.width>0&& size.height>0)inimshow, file /home/pi/Documents/opencv-2.4.13/modules/highgui/src/window.cpp, line261terminate called after throwing an instance of'cv::Exception'what():/home/pi/Documents/opencv-2.4.13/...
确认不是程序原因,找到了`HIGHGUI ERROR: V4L/V4L2: VIDIOC_S_CROP`错误 几经周折最后找到了可行方法 以下是原文 原文地址https://blog.csdn.net/billbliss/article/details/72140471 linux下对于自己编译的opencv版本 调用视频抓取的时候,有时会出现 HIGHGUI ERROR: V4L/V4L2: VIDIOC_S_CROP 方法 1. 安装 依赖...
先实现脱离vscode，使用shell的远程显示 shell的远程显示：Windows Xming +Xshell 实现远程 linux gui ...
How to set pixelaspect values returned by VIDIOC_CROPCAP? [1]:https://github.com/umlaeute/v4l2loopback [2]:http://git.videolan.org/?p=vlc.git;a=blob;f=modules/access/v4l2/demux.c;hb=HEAD#l248 [3]:http://www.linuxtv.org/downloads/v4l-dvb-apis/vidioc-cropcap.html ...
在进行V4L2开发中,常用的命令标识符如下: (1)VIDIOC_REQBUFS:分配内存; (2)VIDIOC_QUERYBUF:把VIDIOC_REQBUFS中分配的数据缓存转换成物理地址; (3)...VIDIOC_CROPCAP:查询驱动的修剪功能; (9)VIDIOC_S_CROP:设置视频信号的边框; (10)VIDIOC_G_CROP:读取视频信号的边框; (11)VIDIOC_QBUF:把数据从缓存中读取...
sel.target = V4L2_SEL_TGT_CROP; // 示例目标,根据实际需求调整 if (ioctl(fd, VIDIOC_S_SELECTION, &sel) == -1) { perror("vidioc_s_selection"); // 适当的错误处理,例如: // if (errno == EINVAL) { // printf("Device does not support VIDIOC_S_SELECTION "); // } close(fd)...
Crop Capability Video Capture: Bounds : Left 0, Top 0, Width 1280, Height 720 Default : Left 0, Top 0, Width 1280, Height 720 Pixel Aspect: 1/1 Selection: crop_default, Left 0, Top 0, Width 1280, Height 720, Flags: Selection: crop_bounds, Left 0, Top 0, Width 1280,...
And I have an ffmpeg command to vstack the image on top of the video with some other filters to scale and crop it all together right (not shown for simplicity). My pi 4B is running 64 bit ubuntu server 22.04 LTS and has ffmpeg 4.4 installed. This is the command: Code: Select all...