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you can test my modifications on your code

import cv2
import time

cap = cv2.VideoCapture(0)

width = int(cap.get(3))
height = int(cap.get(4))
fcc = cv2.VideoWriter_fourcc(*'XVID')
#writer = cv2.VideoWriter('e:/test.avi', fcc, 60.0, (width, height))
recording = False
videono = 0

while(1):
    ret, frame = cap.read()
    hms = time.strftime('%H:%M:%S', time.localtime())

    cv2.putText(frame, str(hms), (0, 15), cv2.FONT_HERSHEY_SIMPLEX,0.5,(0,0,255))

    cv2.imshow('frame', frame)

    k = cv2.waitKey(1) & 0xff
    if k == ord('r'):
        path = 'e:/test_' + str(videono) + '.avi'
        videono += 1
        print(path)
        writer = cv2.VideoWriter(path, fcc, 30.0, (width, height))
        recording = True
        print('recording')

    if recording:
        writer.write(frame)

    if k == ord('e'):
        print('record end')
        writer.release()

cap.release()
cv2.destroyAllWindows()

you can test my modifications on your code

import cv2
import time

cap = cv2.VideoCapture(0)

width = int(cap.get(3))
height = int(cap.get(4))
fcc = cv2.VideoWriter_fourcc(*'XVID')
#writer = cv2.VideoWriter('e:/test.avi', fcc, 60.0, (width, height))
recording = False
videono = 0

while(1):
    ret, frame = cap.read()
    hms = time.strftime('%H:%M:%S', time.localtime())

    cv2.putText(frame, str(hms), (0, 15), cv2.FONT_HERSHEY_SIMPLEX,0.5,(0,0,255))

    cv2.imshow('frame', frame)

    k = cv2.waitKey(1) & 0xff
    if k == ord('r'):
        path = 'e:/test_' + str(videono) + '.avi'
        videono += 1
        print(path)
print(path+' recording')
        writer = cv2.VideoWriter(path, fcc, 30.0, (width, height))
        recording = True
        print('recording')

    if recording:
        writer.write(frame)

    if k == ord('e'):
        print('record end')
print('recording finished')
        recording = False
        writer.release()

cap.release()
cv2.destroyAllWindows()

you can test my modifications on your code

import cv2
import time

cap = cv2.VideoCapture(0)

width = int(cap.get(3))
height = int(cap.get(4))
fcc = cv2.VideoWriter_fourcc(*'XVID')
#writer = cv2.VideoWriter('e:/test.avi', fcc, 60.0, (width, height))
recording = False
videono = 0

while(1):
    ret, frame = cap.read()
    hms = time.strftime('%H:%M:%S', time.localtime())

    cv2.putText(frame, str(hms), (0, 15), cv2.FONT_HERSHEY_SIMPLEX,0.5,(0,0,255))

    cv2.imshow('frame', frame)

    k = cv2.waitKey(1) & 0xff
    if k == ord('r'):
ord('r') and recording is False:
        path = 'e:/test_' + str(videono) + '.avi'
        videono += 1
        print(path+' recording')
        writer = cv2.VideoWriter(path, fcc, 30.0, (width, height))
        recording = True

    if recording:
        writer.write(frame)

    if k == ord('e'):
        print('recording finished')
        recording = False
        writer.release()

cap.release()
cv2.destroyAllWindows()