OpenCV study notes (13) is converted into a video image

 

The essential

A parameter in the resolution of the resolution of the image itself, instead of specifying the video resolution generated. If you want to modify the resolution, or post-processing software, either in image when resize

2 To quit normal, do not force quit.

3 is generated only avi format.

 

#include <iostream>
#include <string>
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/core/core.hpp"
#include "opencv2/opencv.hpp"

using namespace std;
using namespace cv;
void  Video_To_Image(string filename);
void  Image_To_Video();
int imagetovideo();
int main()
{
	//string video_name = "test.avi";//注意，使用string时，若不用using namespace std，需要使用std::string
	//Video_To_Image(video_name);
	Image_To_Video();
	//imagetovideo();
	return 0;
}


void Video_To_Image(string filename)
{
	cout << "---------------Video_To_Image-----------------" << endl;
	Capture :: VideoCapture CV (filename); 
	if (!capture.isOpened())
	{
		COUT << "Open Video error"; 
	} 
	/ * CV_CAP_PROP_POS_MSEC - the current position of the video (in milliseconds) 
	CV_CAP_PROP_POS_FRAMES - the current position of the video (frame) 
	CV_CAP_PROP_FRAME_WIDTH - width of the video stream 
	CV_CAP_PROP_FRAME_HEIGHT - video stream height 
	CV_CAP_PROP_FPS - frame rate (frames / sec) * / 
	int frame_width = (int) capture.get (CV_CAP_PROP_FRAME_WIDTH); 
	int FRAME_HEIGHT = (int) capture.get (CV_CAP_PROP_FRAME_HEIGHT); 
	a float frame_fps = capture.get (CV_CAP_PROP_FPS); 
	int Frame_Number = capture.get (CV_CAP_PROP_FRAME_COUNT); // total number of frames 
	COUT << "frame_width IS" << endl << frame_width; 
	COUT << "FRAME_HEIGHT IS" << endl << FRAME_HEIGHT; 
	COUT << "frame_fps is " << frame_fps << endl;

	int num = 0; // count the number of frames  
	cv :: Mat img;
	String img_name; 
	char image_name [20 is]; 
	CV :: namedWindow ( "MyVideo", CV_WINDOW_AUTOSIZE); 
	the while (to true) 
	{ 
		CV :: Mat Frame; 
		// read from a video frame 
		BOOL bSuccess capture.read = (frame); 
		IF (! bSuccess) 
		{ 
			COUT << "video files can not be read from the frame" << endl; 
			BREAK; 
		} 
		// displaying the current frame on the window MyVideo 
		imshow ( "MyVideo" , Frame); 
		// save the image name 
		// sprintf (const_cast <char *> (img_name.data ()), "% s% d% s", "image", ++ num, ".jpg"); // save the image name 
		sprintf (image_name, "% s% d% s", "image", ++ num, ".jpg"); // save the image name 
		img_name = image_name;
		imwrite (img_name, frame); // save to save a picture 
		IF (CV ::waitKey (30) == == 27 || NUM Frame_Number) 
		{ 
			COUT << "Press ESC" << endl;
			BREAK; 
		} 
	} 
	capture.release (); // this sentence need not seemingly 
} 



void Image_To_Video () 
{ 
	COUT << "------ --------------- Video_To_Image ----------- "<< endl; 
	
	String s_image_name; 
	CV :: VideoWriter Writer; 
	int isColor = 1; // do not know is doing with 
	int frame_fps = 25; 
	int frame_width = 1920; / / must be true image resolution, which is not specified resolution of generated video 
	int FRAME_HEIGHT = 1080; 

	String video_name = "out.avi"; 
	// CV_FOURCC ( 'M', 'J', 'P', 'G' ) CV_FOURCC ( 'D', 'the I', 'V', 'X-') 
	COUT << "FRAME_HEIGHT IS" <<frame_height << endl;
	cout << "frame_fps is " << frame_fps << endl; 
	Writer = VideoWriter (video_name, CV_FOURCC ( 'D', 'I', 'V', 'X'), frame_fps, Size(frame_width, frame_height), isColor);
	<< cout "frame_width IS" << endl << frame_width; 
	CV :: namedWindow ( "Image to Video", CV_WINDOW_AUTOSIZE); 
	int NUM = 50; // Enter the total number of sheets of pictures 
	int i = 1; 
	Mat img; 


	IF (! writer.isOpened ()) 
	{ 
		COUT << "Error: Fail to Open Video Writer \ n-" << endl; 
		return; 
	} 


	the while (I <= NUM) 
	{ 
		String path = "F.: / dongdong / learning materials. 1 / paper 1/2 released / dense tracking / latest paper / Code / data 0 / optical flow tracking / Result / test2 / 2GUI / 1 / "; 
		s_image_name the to_string :: = path STD + (I ++) +" .jpg "; 
		img = imread (s_image_name); // read into the picture 
		if (! img.data) // determine whether the images transferred successfully 
		{ 
			cout << "Could not the Load Image File ... \ the n-" << endl;
			
			break;
		}
		//imshow(); 
		// write 
		
		writer << img;

		imshow("image to video", img);
		waitKey(1);

		if (cv::waitKey(30) == 27 || i == num)
		{
			cout << "按下ESC键" << endl;
			cvReleaseVideoWriter;
			break;
		}
	}
	cvReleaseVideoWriter;
}