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jeffbass / imagezmq

A set of Python classes that transport OpenCV images from one computer to another using PyZMQ messaging.
MIT License
1.02k stars 161 forks source link

How to stream two videos on one device #22

Closed JCP13 closed 4 years ago

JCP13 commented 4 years ago

Hi,

Thank you for the great project. I would like to stream two videos from one pi device but I am not sure how to do that, any thoughts?

Thank you in advance.

jeffbass commented 4 years ago

I have sent 2 image streams from the same RPi by using a PiCamera and a USB Webcam attached to the same RPi.

The existing imagezmq test programs show how to send a single stream of images from a single PiCamera. If you want to send a 2nd video stream of images from the same RPi, you would have to use a USB Webcam plugged into one of the USB ports on the RPi. I have one RPi set up with 1 PiCamera and 1 USB WebCam (a Logitech C920 Webcam). To test the 2 camera RPi setup I modified test_2_rpi_send_images.py. Running 2 cameras on the same RPi requires 2 unique names for the 2 streams, and requires 2 camera instantiations from VideoStream and 2 image reads and 2 image sends. Here are the changes I made to test_2_rpi_send.py:

rpi_name = socket.gethostname()  # send RPi hostname with each image
picam_name = rpi_name + " PiCamera"  # this name will show on PiCamera images
webcam_name = rpi_name + " WebCam"  # this name will show on WebCam images
picam = VideoStream(usePiCamera=True).start()
webcam = VideoStream(usePiCamera=False).start()
time.sleep(2.0)  # allow camera sensor to warm up
while True:  # send images as stream until Ctrl-C
    image = picam.read()
    sender.send_image(picam_name, image)
    image = webcam.read()
    sender.send_image(webcam_name, image)

The test_2_mac_receive_images.py program did not need any changes. Hope that helps. Let me know if this answers your question.

JCP13 commented 4 years ago

Thank you Jeff, that worked wonderfully 👍

jeffbass commented 4 years ago

You're welcome! Glad it worked for you.