#!/usr/bin/python3
import numpy as np
import cv2
import datetime
from time import sleep

cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080)

# 15fps: 1/15 = 0.066666667
one_sec = datetime.timedelta(microseconds=990000)
#one_sec = datetime.timedelta(seconds=1)
while(True):
    start = datetime.datetime.now()
    dt = start.strftime('%Y%m%d-%H%M%S')
    ms = '{0:03f}'.format(start.microsecond/1000)

    ret, frame = cap.read()
    cv2.imwrite("img/" + dt + "-" + ms + ".jpg", frame)

    while(True):
        end = datetime.datetime.now()
        if (end - start) > one_sec:
            break
        sleep(0.01)

# sleep is not so much accurate
#sleep(1.0 - (start.microsecond - end.microsecond) / 1000000.0)

cap.release()
cv2.destroyAllWindows()