Synchronize multiple acA3800-14um cameras

[KANGRUIMING]

Hello,

I am attempting to synchronize eight acA3800-14um cameras using a software trigger via USB 3.0. However, I am experiencing some latency. To minimize latency, I am inquiring about the proper method for setting up hardware trigger via GPIO for these cameras to record video.

Thank you

import cv2
from pypylon import genicam
from pypylon import pylon
import time
import multiprocessing
import threading
import platform

converter = pylon.ImageFormatConverter()
converter.OutputPixelFormat = pylon.PixelType_BGR8packed
converter.OutputBitAlignment = pylon.OutputBitAlignment_MsbAligned

waitTime = 1
numFrames = 10

def save_image(camera1):
    while camera1.IsGrabbing():
        for x in range(numFrames):  
            with camera1.RetrieveResult(5000) as grabResult:
                if grabResult.GrabSucceeded():                
                    print('cam#1_' + str(x))
                    image = converter.Convert(grabResult)
                    img = image.GetArray()
                    cv2.imwrite('cam#1_'+ str(x) + '.png', img)  
            print('waiting for ' + str(waitTime) + ' seconds')   
            time.sleep(waitTime)
        break

def save_image2(camera2):
    while camera2.IsGrabbing():
        for x in range(numFrames):  
            with camera2.RetrieveResult(5000) as grabResult:
                if grabResult.GrabSucceeded():
                    print('cam#2_' + str(x))
                    image = converter.Convert(grabResult)
                    img = image.GetArray()
                    cv2.imwrite('cam#2_' + str(x) + '.png', img)
            print('waiting for ' + str(waitTime) + ' seconds')
            time.sleep(waitTime)
        break

if __name__ == '__main__':  
    try:
        tlFactory = pylon.TlFactory.GetInstance()
        devices = tlFactory.EnumerateDevices()

        camera1 = pylon.InstantCamera(tlFactory.CreateDevice(devices[0]))
        camera2 = pylon.InstantCamera(tlFactory.CreateDevice(devices[1]))

        camera1.Open()
        camera2.Open()

        camera1.StartGrabbing(pylon.GrabStrategy_LatestImageOnly)
        camera2.StartGrabbing(pylon.GrabStrategy_LatestImageOnly)

        t1 = threading.Thread(target=save_image, args=(camera1,))
        t2 = threading.Thread(target=save_image2, args=(camera2,))

        t1.start()
        t2.start()

        t1.join()
        t2.join()

    except genicam.GenericException as e:
        # Error handling.
        print("An exception occurred.", e.GetDescription())

[SMA2016a]

Please refer the document page to get some information on setting up GPIO

https://docs.baslerweb.com/line-source