title: Saving bounding box coordinates for each frame in a video
body: <p>I have a video from a camera with humans on the scene. I need to go through each frame of that video and <strong>manually</strong> save the coordinates (go through each frame and draw the square around each human) of the bounding box of the detected humans on the scene and the coordinate of the center of the head - so basically, <code>top-left</code>, <code>bottom-right</code>, <code>head-center</code> coordinates. The bounding box has to be a square. </p>
  
  <p>An additional program will then read a file with coordinates of the square and center of head and the frame number, and extract the boxes as an image.</p>
  
  <p>For anybody that has experience with computer vision - is there any open-source software that can accomplish what I am requesting? If not, what technology would you recommend building this tool on? Any starter code?</p>