I am trying to achieve to get the streams from multiple ip cameras and display it. I have two ipcamera with urls : rtsp and rtsp1
When i run the following program, Only first window loads and works fine until the second thread kicks in.
Things works fine with multiple streams in the following methods :
Works without threads. i.e
cam0 = cv2.VideoCapture(rtsp) cam1 = cv2.VideoCapture(rtsp1) ret, frame0 = cam0.read() ret, frame1 = cam1.read()
show imshow(frame0) & (frame1)
But this method is primitive and get lags. Moreover not scalable with more cameras.
2) If i run only one thread, the video streaming works fine. 3) if i run it as two different python program targeting each rtsp stream, i have no issue. Again not practical for more cameras.
But the objective was to run multiple ipcamera from one single program. Any help to highlight the mistake i made would be highly appreciated.
import cv2
import os
import time
import threading
os.environ["OPENCV_FFMPEG_CAPTURE_OPTIONS"] = "rtsp_transport;udp"
rtsp1 = 'rtsp://userid:[email protected]:8080/h264_ulaw.sdp'
rtsp='rtsp://userid:[email protected]:10554/udp/av0_0'
def getPicture(url):
cam = cv2.VideoCapture(url)
a=cam.get(cv2.CAP_PROP_BUFFERSIZE)
cam.set(cv2.CAP_PROP_BUFFERSIZE,3)
start_frame_number = 20
cam.set(cv2.CAP_PROP_POS_FRAMES, start_frame_number)
print("buffer"+str(a))
while True:
ret, frame = cam.read()
small_frame = cv2.resize(frame, (0, 0), fx=.50, fy=.50)
small_frame = cv2.cvtColor(small_frame,cv2.COLOR_BGR2GRAY)
cv2.imshow("camera",small_frame)
key = cv2.waitKey(20)
if key == 27: # exit on ESC
break
# When everything done, release the video capture object
cam.release()
# Closes all the frames
cv2.destroyAllWindows()
if __name__ == '__main__':
t1 = threading.Thread(target=getPicture, args=(rtsp,))
t2 = threading.Thread(target=getPicture, args=(rtsp1,))
t1.start()
t2.start()
