这是我编写的代码段。大概是一本书。我想您可以遍历所有/ dev / videoN节点并获取信息。
#include <stdio.h>#include <unistd.h>#include <fcntl.h>#include <sys/ioctl.h>#include <linux/videodev.h>int main(){ int fd; struct video_capability video_cap; struct video_window video_win; struct video_picture video_pic; if((fd = open("/dev/video0", O_RDONLY)) == -1){ perror("cam_info: Can't open device"); return 1; } if(ioctl(fd, VIDIOCGCAP, &video_cap) == -1) perror("cam_info: Can't get capabilities"); else { printf("Name:tt '%s'n", video_cap.name); printf("Minimum size:t%d x %dn", video_cap.minwidth, video_cap.minheight); printf("Maximum size:t%d x %dn", video_cap.maxwidth, video_cap.maxheight); } if(ioctl(fd, VIDIOCGWIN, &video_win) == -1) perror("cam_info: Can't get window information"); else printf("Current size:t%d x %dn", video_win.width, video_win.height); if(ioctl(fd, VIDIOCGPICT, &video_pic) == -1) perror("cam_info: Can't get picture information"); else printf("Current depth:t%dn", video_pic.depth); close(fd); return 0;}
