How to keep posenet running if the camera is not detected

[AK51]

Hi,

As the posnet.py start, the IP camera may not be ready, what is a proper way to keep the program from existing?
if(jetson.utils.videoSource(“rtsp…”)):?

I can do “try” in the loop just in case someone unplug the network cable…
try:
img = camera.Capture()
except:
print(“”)

Thx

import jetson.inference
import jetson.utils

net = jetson.inference.detectNet("ssd-mobilenet-v2", threshold=0.5)

#############################################
while not(jetson.utils.videoSource("rtsp........")):
      camera = jetson.utils.videoSource("rtsp........")
#############################################

display = jetson.utils.videoOutput("display://0") # 'my_video.mp4' for file

while display.IsStreaming():
        try:
	      img = camera.Capture()
        except:
	      print("skip frame")
	detections = net.Detect(img)
	display.Render(img)
	display.SetStatus("Object Detection | Network {:.0f} FPS".format(net.GetNetworkFPS()))

[AastaLLL]

Hi,

As you said, this can be done by adding some exception handlers.
Add @dusty_nv here for more comments.

Thanks.

[dusty_nv]

Hi @AK51, yes you can use the except handlers, and depending on the behavior of your IP camera you can eventually del camera and re-create it if you need to establish the pipeline again from scratch.

Also, there is an optional timeout parameter to videoSource.Capture() which specifies the timeout in milliseconds. The default is -1, which means never timeout. 0 means return immediately if no frame.

[AK51]

Hi,

I try to make it work, but it seems every trial uses up some resource…
core dumped when the camera begins…

[dusty_nv]

Do you delete (del) the previous videoSource before trying to create a new one? Also, you may need to add some sleep() statements to wait for some time before continually trying to re-connect.

[AK51]

Oh yes. Silly me, after I’ve added the time.sleep(5), it works.
Thx Dusty