Looks like the video reader `bob.io.video.reader` does not close the video file when iterating over frames AND the iteration does not finish fully. For example: ```python video = bob.io.base.load('testvideo.avi') # closes the video file properly for frame in reader('testvideo.avi'): pass # closes the video file properly for frame in reader('testvideo.avi'): break # the video file is left open! import gc gc.collect() # the video file is still open! ```