I started up with simple codes on "OpenCV2 プログラミングブック", named "simple_capture."
This program captures seen and make a video file of what was captured.
My questions:
1. what's cv::VideoWriter?
Explanations on OpenCV.jp page : https://opencv.jp/opencv-2svn/cpp/reading_and_writing_images_and_video.html
So, it seems exposing the captured stream to file.
2. what's these "<<, >>"?
Ok, it's substitution.
"capture >> fram" is substituting captured image, which is the class of "cv::VideoCapture", to the prepared frame, the class of "cv::Mat".
And, "writer << frame" is substituting the frame to writer.
One question rises up: Why doesn't substitute capture to writer directly? Is it higly costing?
3. imshow
Saw "https://opencv.jp/opencv-2svn/cpp/user_interface.ht"
win_src means the window name, and it was defined as src.
Class "std::string" is class of c++, it means sequence of characters : "https://www.cplusplus.com/reference/string/string/"
So, the window name must be src.
