杨培文

sudo add-apt-repository ppa:mc3man/trusty-media
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install ffmpeg

#include <stdio.h>
#include <fcntl.h>
#include <linux/videodev2.h>

char videodevice[] = "/dev/video0";
void printFrameInterval(int fd, unsigned int fmt, unsigned int width, unsigned int height)
{
    struct v4l2_frmivalenum frmival;
    memset(&frmival,0,sizeof(frmival));
    frmival.pixel_format = fmt;
    frmival.width = width;
    frmival.height = height;
    while (ioctl(fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival) == 0) 
    {
        if (frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE) 
            printf("[%dx%d] %f fps\n", width, height, 1.0*frmival.discrete.denominator/frmival.discrete.numerator);
        else
            printf("[%dx%d] [%f,%f] fps\n", width, height, 1.0*frmival.stepwise.max.denominator/frmival.stepwise.max.numerator, 1.0*frmival.stepwise.min.denominator/frmival.stepwise.min.numerator);
        frmival.index++;    
    }
}
int main()
{
	//打开摄像头设备
	int fd = -1;
	fd = open (videodevice, O_RDWR, 0);
	if(fd<0){
		printf("failed to open\n");
		return -1;
	}
	printf("打开摄像头设备成功，%s\n", videodevice);

	//查询摄像头信息，VIDIOC_QUERYCAP
	printf("------------\n");
	struct v4l2_capability cap;
	ioctl (fd, VIDIOC_QUERYCAP, &cap);
	printf("Driver Name:%s\nCard Name:%s\nBus info:%s\nDriver Version:%u.%u.%u\n\n",cap.driver,cap.card,cap.bus_info,(cap.version>>16)&0XFF, (cap.version>>8)&0XFF,cap.version&0XFF);

	//查询摄像头视频格式，VIDIOC_ENUM_FMT
	printf("------------\n");
	struct v4l2_fmtdesc fmtdesc;
	fmtdesc.index=0;
	fmtdesc.type=V4L2_BUF_TYPE_VIDEO_CAPTURE;
	printf("Supportformat:\n");
	while(ioctl(fd,VIDIOC_ENUM_FMT,&fmtdesc)!=-1)  
	{
		printf("\t%d.%c%c%c%c\t%s\n",fmtdesc.index+1,fmtdesc.pixelformat & 0xFF, (fmtdesc.pixelformat >> 8) & 0xFF,(fmtdesc.pixelformat >> 16) & 0xFF, (fmtdesc.pixelformat >> 24) & 0xFF,fmtdesc.description);
		fmtdesc.index++;
	}

	v4l2_close(fd);
	return 0;
}

gcc test.c -o test -lv4l2
./test

sudo apt-get install cmake cmake-qt-gui
cmake-gui

sudo make install

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <cstdio>

using namespace cv;

int main()
{
    VideoCapture cap(0); // open the default camera
    if(!cap.isOpened())  // check if we succeeded
        return -1;

    Mat frame;
    int i = 0;
    char filename[10];
    while(i<5)
    {
        i++;
        cap.read(frame);
        sprintf(filename, "img%d.jpg", i);
        imwrite(filename, frame);
        printf("frame:%d\n", i);
    }

    return 0;
}

mipsel-openwrt-linux-g++ test.cpp -o test -lopencv_core -lopencv_highgui
scp test root@192.168.8.1:/root

sudo ln -s /home/ypw/Desktop/wrtnode/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-g++ /usr/local/bin

ssh root@192.168.8.1
echo 1 > /sys/bus/usb/devices/1-1.3/bConfigurationValue
./test

sudo apt-get install libopencv-dev

g++ test.cpp -o test -lopencv_core -lopencv_highgui

echo 1 > /sys/bus/usb/devices/1-1.3/bConfigurationValue

v4l2-ctl --list-formats
v4l2-ctl --list-formats-ext

make menuconfig

make -j8

dmesg | grep usb

echo 1 > /sys/bus/usb/devices/1-1.3/bConfigurationValue

mjpg_streamer -i "input_uvc.so -f 25 -r 640*480" -o "output_http.so -p 8080"

sudo ln -s /home/ypw/Desktop/wrtnode/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-gcc /usr/local/bin/

mkdir test
cd test
nano test.c

ssh root@192.168.8.1
./test

tar -jxvf sdk.tar.bz2
cd wrtnode

sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get -y install build-essential subversion libncurses5-dev zlib1g-dev gawk gcc-multilib flex git-core gettext libssl-dev

cd Desktop/wrtnode
make menuconfig
make V=s

make -j8

{
  "cmd": ["bash", "-c", "g++ '${file}' -o '${file_path}/${file_base_name}' && osascript -e 'tell app \"iTerm\"' -e 'set newWindow to (create window with default profile command \"/bin/zsh\")' -e 'tell current session of current window' -e 'write text \"clear && cd \\\"${file_path}\\\"&&\\\"${file_path}/${file_base_name}\\\" && echo \\\"Finished \\\"${file_base_name}\"' -e 'end tell' -e 'end tell'"],
  "file_regex": "^(..[^:]*):([0-9]+):?([0-9]+)?:? (.*)$",
  "working_dir": "${file_path}",
  "selector": "source.c, source.c++, source.cpp",

  "variants":
  [
    {
      "name": "Run",
      "cmd": ["bash", "-c", "g++ '${file}' -o '${file_path}/${file_base_name}' && '${file_path}/${file_base_name}'"]
    }
  ]
}