video_recorder_setup_videoio.cpp

video_recorder_setup_videoio.cpp

bool video_recorder::setup_videoio(cv::Mat & mat, double fps) {

	std::string cmdline = ffmpeg_path_.string() + 
		" -framerate " + std::to_string(static_cast<int>(fps)) +
		" -f image2pipe -vcodec png -i - -c:v libx264 -pix_fmt yuv444p" +
		" -preset faster " +
		//" -preset ultrafast " +
		" -crf 14" +
		//" -qp 0 " +
		" -vf drawtext=\"fontcolor = white:fontfile = " +
		" calibril.ttf : text = '%{localtime\\:%H %M %S}'\" " + 
		" -y -report " + filename;
	pipe_stdin = std::make_shared<boost::process::opstream>();
	c = std::make_shared<boost::process::child>(cmdline,
		(boost::process::std_out & boost::process::std_err) > "logerr.txt",
		boost::process::std_in < *pipe_stdin
		);
	if (c->running()) {
		cout << "recorder::setup_videoio video_writer created using fps: " << fps << endl;
		return true;
	}
	else {
		cout << "recorder::setup_videoio video_writer could not be opened" << endl;
		return false;
	}
}