usb speed super_plus mode in v3

Unknown

Hi @jakaskerl , i have attached a python file, using depthai v3, can you please tell me how to use the usb speed mode as SUPERPLUS in the v3.
Please modify the attached file with the changes if possible.

Unknown

Hi @jakaskerl
this is the mode i am using , please give me the code with usb speed as super_plus for depthai version 3

#!/usr/bin/env python3

import cv2
import depthai as dai
# Create pipeline
pipeline = dai.Pipeline()
# Define source and output
camRgb = pipeline.create(dai.node.ColorCamera)
#Properties
camRgb.setBoardSocket(dai.CameraBoardSocket.CAM_A)
camRgb.setResolution(dai.ColorCameraProperties.SensorResolution.THE_1080_P)camRgb.setVideoSize(1920, 1080)
# Linking
videoQueue = camRgb.video.createOutputQueue()
pipeline.start()
while pipeline.isRunning():
videoIn = videoQueue.get() # blocking
cv2.imshow("video", videoIn.getCvFrame())
if cv2.waitKey(1) == ord('q'):
break

OskarSonc

Hi @Unknown,

In DepthAI v3 the USB link speed is auto-negotiated to the best the setup supports (device + host port + cable). You can request SuperSpeed+ (10 Gbps) by capping the device to SUPER_PLUS, but if the hardware path can’t do it, the device will automatically run at the best available (e.g., SUPER ≈ 5 Gbps).

Below is a small test snippet you can run. It requests SUPER_PLUS and prints the negotiated link so you can verify what you actually get:

import cv2, depthai as dai

# Ask for up to SUPER_PLUS (10 Gbps)
device = dai.Device(maxUsbSpeed=dai.UsbSpeed.SUPER_PLUS)

with dai.Pipeline(device) as pipeline:
    cam = pipeline.create(dai.node.Camera).build(dai.CameraBoardSocket.CAM_A)
    out = cam.requestOutput((1920, 1080), dai.ImgFrame.Type.BGR888p)
    q = out.createOutputQueue()

    print("Requested cap:", dai.UsbSpeed.SUPER_PLUS.name)
    print("Negotiated:", device.getUsbSpeed().name)  # SUPER or SUPER_PLUS, etc.

    pipeline.start()
    while pipeline.isRunning():
        frame = q.get()
        cv2.imshow("video", frame.getCvFrame())
        if cv2.waitKey(1) == ord('q'):
            break

Unknown

Hi @OskarSonc ,
thanks for the response.
How can i check for the bandwidth?

OskarSonc

Hi @Unknown,

well the output from the script above gives you a basic idea (SUPER ≈ 5 Gbps, SUPER_PLUS ≈ 10 Gbps). These values are the maximum link capacities for the USB connection.

There isn’t a direct function in DepthAI that returns the actual bandwidth, since it changes depending on how much data your pipeline is sending. If you need a number, a possible workaround is to capture the frames arriving on the host, sum their sizes, and calculate the bandwidth in Mbps.

If you’d like, I can share a small code snippet that does exactly that.

Unknown

Thanks for the help @OskarSonc

Unknown

Hi @OskarSonc "#1269 , what is the default fps obtained from the camera pipeline for depthai v3 ? if it is 30 , how can we set it to 60 fps using the code you have provided above.

OskarSonc

Hi @Unknown,

in v3 there isn’t a fixed “default FPS” — if you don’t set it, the Camera node auto-selects based on the sensor. To request 60 FPS you just add the fps=60 argument in requestOutput(...), for example:

out = cam.requestOutput((1920, 1080), dai.ImgFrame.Type.BGR888p, fps=60)

Whether it really runs at 60 depends on the sensor, the selected resolution, and the negotiated USB connection.

Best
Oskar