Hello,
I tried to getting videos from three cameras in the same time, but I have the following error, do you have any idea how to read videos from three cameras in python with opencv? It's possible?
This is my code:
import cv2
cap1 = cv2.VideoCapture(0)
cap2 = cv2.VideoCapture(1)
cap3 = cv2.VideoCapture(2)
while True:
print("In while")
test1, frame1 = cap1.read()
test2, frame2 = cap2.read()
test3, frame3 = cap3.read()
gray1 = cv2.cvtColor(frame1, cv2.COLOR_BGR2GRAY)
gray2 = cv2.cvtColor(frame2, cv2.COLOR_BGR2GRAY)
gray3 = cv2.cvtColor(frame3, cv2.COLOR_BGR2GRAY)
if(test1):
cv2.imshow('frame1', gray1)
print("Frame 1")
if(test2):
cv2.imshow('frame2', gray2)
print("Frame 2")
if(test3):
cv2.imshow('frame3', gray3)
print("Frame 3")
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap1.release()
cap2.release()
cap3.release()
cv2.destroyAllWindows()
And this is the error:
> [ WARN:0] videoio(MSMF):> OnReadSample() is called with error> status: -1072875772 [ WARN:0]> videoio(MSMF): async ReadSample() call> is failed with error status:> -1072875772 [ WARN:1] videoio(MSMF): can't grab frame. Error: -1072875772>> Traceback (most recent call last): > File "main.py", line 21, in > gray3 = cv2.cvtColor(frame3, cv2.COLOR_BGR2GRAY) cv2.error:> OpenCV(3.4.5)> C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:181:> error: (-215:Assertion failed)> !_src.empty() in function> 'cv::cvtColor'>> [ WARN:1] terminating async callback [> WARN:1] terminating async callback
Can you help me, please, to clarify this topic?
Thank you in advance! :)
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