Multithreaded video streaming

Robovision offers efficient, multithreaded video camera streaming. One thread reads frames from the camera and puts them onto a queue. When you request a frame, another thread pulls it off the queue for you.

Basic usage

You must create an instance of the VideoStream class for each video source you'll read from. Then, you start() it, which starts the capture thread running. Pull frames as needed with read_frame(). When done, be sure to call stop() on the source to halt all threads.

import robovision as rv

# create your VideoStream instance, for example:
vs_webcam = rv.VideoStream(cam_id=0)
vs_ipcam = rv.VideoStream(source="ipcam", ipcam_url="http://10.15.18.101/mjpg/video.mjpg")
vs_picam = rv.VideoStream(source="picam")
vs_jetson = rv.VideoStream(source="jetson", resolution=(1920, 1080))
# or, use the shorthand notation for the IPCam or USB web cam
source = 0  # the integer identifying your webcam
vs = rv.get_video_stream(source)

# start the source, for example:
vs_webcam.start()

while True:
    # retrieve a frame from the queue
    frame = vs_webcam.read_frame()
    # do stuff with the frame
    # wait for Esc or q key and then exit
    key = cv2.waitKey(1) & 0xFF
    if key == 27 or key == ord("q"):
        vs_webcam.stop()
        break