input frame

[SabraHashemi]

your code can not work with a 1920x1080 frame (it will crashed)
how can i improve the code to run on any videos?

[hadign20]

Hi
I tried with a larger video (3840x2160). It is slow but didn't crash.
You can set the DEBUG values to 0. Also, try increasing the block size and window size to see if it speeds up. In general, it's better to scale down the input videos to avoid slow processing. You can set the scale variable to true for this.

[SabraHashemi]

but i have got below error when i want to run on Size : 1920X1080 but if ran it on woman.mp4 video it works
error text :
OpenCV(3.4.1) Error: Assertion failed (cn <= 4) in scalarToRawData, file /home/sabra-pc/Projects/Moving-Objects/DCFG/opencv_install/opencv-3.4.1/modules/core/src/array.cpp, line 3232
Aborted (core dumped)

this error happened in KLT function:

void DCFG::KLT(cv::Mat& imgGray) {
#if DFCG_DEBUG
	cv::RNG rng(12345);
	colorFrame.copyTo(testImg);
#endif

	if (!points[0].empty())
	{
		calcOpticalFlowPyrLK(prevGray, imgGray, points[0], points[1], status, err, winSize, 3, termcrit, 0, 0.001);
		size_t i;
		for (i = count = 0; i < points[1].size(); i++)
		{
			if (!status[i])
				continue;
			nMatch[count++] = i;
#if DFCG_DEBUG
			cv::Scalar color = cv::Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));
			circle(testImg, points[0][i], 3, color, -1, 8);
			circle(testImg, points[1][i], 3, color, -1, 8);
			cv::arrowedLine(testImg, points[0][i], points[1][i], color, 1);
#endif
		}
	}

#if DFCG_DEBUG
	imshow("LK Demo", testImg);
#endif

[SabraHashemi]

also I have set the Debug Flag to 0 but still I have got this error :
./DCFG ~/Datasets/f.mp4
Processing f ...0
Segmentation fault (core dumped)

[dominota]

Not working

[hadign20]

@SabraHashemi I'm not sure if your input video has 3 channels or more.
You can check it by something like std::cout<<img.channels();

[hadign20]

@dominota how is it not working?