Take a snapshot of the current video window.
    If i_width AND i_height is 0, original size is used.
    If i_width XOR i_height is 0, original aspect-ratio is preserved.
    @param p_mi: media player instance.
    @param num: number of video output (typically 0 for the first/only one).
    @param psz_filepath: the path where to save the screenshot to.
    @param i_width: the snapshot's width.
    @param i_height: the snapshot's height.
    @return: 0 on success, -1 if the video was not found.

def libvlc_video_take_snapshot(p_mi, num, psz_filepath, i_width, i_height):
    '''Take a snapshot of the current video window.
    If i_width AND i_height is 0, original size is used.
    If i_width XOR i_height is 0, original aspect-ratio is preserved.
    @param p_mi: media player instance.
    @param num: number of video output (typically 0 for the first/only one).
    @param psz_filepath: the path where to save the screenshot to.
    @param i_width: the snapshot's width.
    @param i_height: the snapshot's height.
    @return: 0 on success, -1 if the video was not found.
    '''
    f = _Cfunctions.get('libvlc_video_take_snapshot', None) or \
        _Cfunction('libvlc_video_take_snapshot', ((1,), (1,), (1,), (1,), (1,),), None,
                    ctypes.c_int, MediaPlayer, ctypes.c_uint, ctypes.c_char_p, ctypes.c_int, ctypes.c_int)
    return f(p_mi, num, psz_filepath, i_width, i_height)