CODEWITHSUNDEEP
pythonpython-3.x
James
James

Reputation: 63

PiCamera and continuous_capture with python and raspberry pi

I'm using a raspberry pi and trying to create a video stream using flask and the pi camera library. My understanding is that I need to use continuous_capture to get the lowest latency within the system.

However, I can't find a way to preview these images that are supposedly being taken. Is there a way I can view these before I try and implement it into flask which has many issues itself as I will be using the falsk website to control a robot as well.

Any suggestions on how to do this are appreciated as well as telling me there is an easier way to do it. Please note I am only an intermediate programmer so nothing too complex for me to understand as this is the whole idea of the project.

Upvotes: 0

Views: 6812

Answers (1)

BeardedDork
BeardedDork

Reputation: 160

I believe you are looking for capture_continuous.

Here's the general process:

  • Import the necessary packages
  • Pause to allow the camera to warm up
  • Iterate through the camera frames
    • Capture and show the frame
from picamera.array import PiRGBArray
from picamera import PiCamera
import time
import cv2

# initialize the camera and grab a reference to the raw camera capture
camera = PiCamera()
camera.resolution = (640, 480)
camera.framerate = 32
rawCapture = PiRGBArray(camera, size=(640, 480))

# allow the camera to warmup
time.sleep(0.1)

# capture frames from the camera
for frame in camera.capture_continuous(rawCapture, format="bgr", use_video_port=True):
    image = frame.array

    # show the frame
    cv2.imshow("Frame", image)
    key = cv2.waitKey(1) & 0xFF

    # clear the stream in preparation for the next frame
    rawCapture.truncate(0)

    # if the `q` key was pressed, break from the loop
    if key == ord("q"):
        break

Upvotes: 3

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