BadriPratti

Hi all,

I'm having trouble deploying a custom YOLOv6n .rvc4.tar.xz model on our Luxonis OAK4-D R2 camera using oakctl.. Despite successfully transferring the model to the camera's/data/ directory and verifying the exact file path, the app consistently fails with a file-not-found error.

What I've done:
1 . I copied the model file to the camera using:
scp yolov6n-r2-288x512.rvc4.tar.xz root@<192.168.1.118>:/data/

2. I confirmed via ssh that the file exists:
   ssh root@<192.168.1.118>
   ls /data
   3.My Python script references the model like this:
   nn_archive = dai.NNArchive("/data/yolov6n-r2-288x512.rvc4.tar.xz")
   4.When I run: oakctl run .
   cp: cannot stat '/data/yolov6n-r2-288x512.rvc4.tar.xz': No such file or directory
   Failed to read develop logs. Reason: Error BuilderError(...)

The model is definitely present on the device and in the correct folder (/data/).
The filepath in the code matches exactly.
SSH access to the file works just fine.
The app builds successfully otherwise, but fails during the develop container startup.

Should I move the model to another directory that is guaranteed to be visible to the container?

Any help or insight would be appreciated. I'm happy to share additional information if needed!

• Badri Pratti

Hello,

Thank you so much for your response, your guidance was very helpful.

I'm working on a DepthAI project using an OAK-D 4 Pro camera, and I'm trying to run a custom person detection model called scrfd_person.rvc4.tar.xz. I followed the official RVC4 documentation and used the code example that loads an NN Archive with dai.NNArchive() and passes it to a SpatialDetectionNetwork. But when I run the code, I get an error saying Unsupported parser: SCRFDParser. I'm not sure why this is happening since I thought the archive would include everything needed. Has anyone else run into this with custom models from the NN Archive? Do I need to do something different to make the SCRFD model work?

https://rvc4.docs.luxonis.com/software/ai-inference/inference/

#!/usr/bin/env python3

from pathlib import Path

import sys

import cv2

import depthai as dai

import numpy as np

import time

nn_archive = dai.NNArchive("/home/oshkosh-host/Downloads/scrfd_person.rvc4.tar.xz")

FPS = 30

class SpatialVisualizer(dai.node.HostNode):

def __init__(self):

    dai.node.HostNode.__init__(self)

    self.sendProcessingToPipeline(True)

def build(self, depth:dai.Node.Output, detections: dai.Node.Output, rgb: dai.Node.Output):

    self.link_args(depth, detections, rgb) # Must match the inputs to the process method

def process(self, depthPreview, detections, rgbPreview):

    depthPreview = depthPreview.getCvFrame()

    rgbPreview = rgbPreview.getCvFrame()

    depthFrameColor = self.processDepthFrame(depthPreview)

    self.displayResults(rgbPreview, depthFrameColor, detections.detections)

def processDepthFrame(self, depthFrame):

    depth_downscaled = depthFrame[::4]

    if np.all(depth_downscaled == 0):

        min_depth = 0

    else:

        min_depth = np.percentile(depth_downscaled[depth_downscaled != 0], 1)

    max_depth = np.percentile(depth_downscaled, 99)

    depthFrameColor = np.interp(depthFrame, (min_depth, max_depth), (0, 255)).astype(np.uint8)

    return cv2.applyColorMap(depthFrameColor, cv2.COLORMAP_HOT)

def displayResults(self, rgbFrame, depthFrameColor, detections):

    height, width, _ = rgbFrame.shape

    for detection in detections:

        self.drawBoundingBoxes(depthFrameColor, detection)

        self.drawDetections(rgbFrame, detection, width, height)

    cv2.imshow("depth", depthFrameColor)

    cv2.imshow("rgb", rgbFrame)

    if cv2.waitKey(1) == ord('q'):

        self.stopPipeline()

def drawBoundingBoxes(self, depthFrameColor, detection):

    roiData = detection.boundingBoxMapping

    roi = roiData.roi

    roi = roi.denormalize(depthFrameColor.shape[1], depthFrameColor.shape[0])

    topLeft = roi.topLeft()

    bottomRight = roi.bottomRight()

    cv2.rectangle(depthFrameColor, (int(topLeft.x), int(topLeft.y)), (int(bottomRight.x), int(bottomRight.y)), (255, 255, 255), 1)

def drawDetections(self, frame, detection, frameWidth, frameHeight):

    x1 = int(detection.xmin \* frameWidth)

    x2 = int(detection.xmax \* frameWidth)

    y1 = int(detection.ymin \* frameHeight)

    y2 = int(detection.ymax \* frameHeight)

    try:

        label = self.labelMap[detection.label]  # Ensure labelMap is accessible

    except IndexError:

        label = detection.label

    color = (255, 255, 255)

    cv2.putText(frame, str(label), (x1 + 10, y1 + 20), cv2.FONT_HERSHEY_TRIPLEX, 0.5, color)

    cv2.putText(frame, "{:.2f}".format(detection.confidence \* 100), (x1 + 10, y1 + 35), cv2.FONT_HERSHEY_TRIPLEX, 0.5, color)

    cv2.putText(frame, f"X: {int(detection.spatialCoordinates.x)} mm", (x1 + 10, y1 + 50), cv2.FONT_HERSHEY_TRIPLEX, 0.5, color)

    cv2.putText(frame, f"Y: {int(detection.spatialCoordinates.y)} mm", (x1 + 10, y1 + 65), cv2.FONT_HERSHEY_TRIPLEX, 0.5, color)

    cv2.putText(frame, f"Z: {int(detection.spatialCoordinates.z)} mm", (x1 + 10, y1 + 80), cv2.FONT_HERSHEY_TRIPLEX, 0.5, color)

    cv2.rectangle(frame, (x1, y1), (x2, y2), color, 1)

# Creates the pipeline and a default device implicitly

with dai.Pipeline() as p:

# Define sources and outputs

camRgb = p.create(dai.node.Camera).build(dai.CameraBoardSocket.CAM_A)

monoLeft = p.create(dai.node.Camera).build(dai.CameraBoardSocket.CAM_B)

monoRight = p.create(dai.node.Camera).build(dai.CameraBoardSocket.CAM_C)

stereo = p.create(dai.node.StereoDepth)

spatialDetectionNetwork = p.create(dai.node.SpatialDetectionNetwork).build(camRgb, stereo, nn_archive, fps=FPS)

visualizer = p.create(SpatialVisualizer)

# setting node configs

stereo.setExtendedDisparity(True)

platform = p.getDefaultDevice().getPlatform()

if platform == dai.Platform.RVC2:

    # For RVC2, width must be divisible by 16

    stereo.setOutputSize(640, 400)

spatialDetectionNetwork.input.setBlocking(False)

spatialDetectionNetwork.setBoundingBoxScaleFactor(0.5)

spatialDetectionNetwork.setDepthLowerThreshold(100)

spatialDetectionNetwork.setDepthUpperThreshold(5000)

# Linking

monoLeft.requestOutput((640, 400)).link(stereo.left)

monoRight.requestOutput((640, 400)).link(stereo.right)

visualizer.labelMap = spatialDetectionNetwork.getClasses()

visualizer.build(stereo.depth, spatialDetectionNetwork.out, spatialDetectionNetwork.passthrough)

p.run()

This is the code that I running what should I fix to run that tar.xw file