def cap_set_frame(cap, frame_number):

Sets an opencv video capture object to a specific frame

def get_cap_selected_frame(cap, show_frame):

Gets a frame from an opencv video capture object to a specific frame

def get_video_params(cap):

Gets video parameters from an opencv video capture object

def open_cvwriter(filepath, w=None, h=None, framerate=None,
    format='.mp4', iscolor=False):

Creats an instance of cv.VideoWriter to write frames to video using
    python opencv
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:param filepath: str, path to file to save
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:param w,h: width and height of frame in pixels
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:param framerate: fps of output video
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:param format: video format
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:param iscolor: bool, set as true if images are rgb, else false if
    they are gray

def save_videocap_to_video(cap, savepath, fmt, fps=30, iscolor=True):

Saves the content of a videocapture opencv object to a file