I'm running the depthai install and demo in a python virtualenv on a jetson xavier nx which yields a core dump. My other python virtualenv on the jetson that runs tensorflow runs with no core dump. Any clue on resolving the core dump would be much appreciated. **Background** The jetson xavier nx is running Ubuntu 18.04. I commented out the open3d==0.10.0.0 line in the requirement file to get the install_requirments.py to run successfully. I installed opencv 4.5.1 using a script from https://github.com/mdegans/nano_build_opencv. I followed the depthai install dependencies instructions before running the install_requirments.py. ***Terminal Output showing depthai successful install and running demo (with core dump), and then import of depthai (loads successfully), cv2, numpy (both generate a core dump).*** (depthai) user@jetson-desktop:~/dev/depthai$ **python3 install_requirements.py** Requirement already satisfied: pip in ./depthai/lib/python3.6/site-packages (21.0.1) WARNING: Skipping depthai as it is not installed. Requirement already satisfied: numpy==1.19.5 in ./depthai/lib/python3.6/site-packages (from -r requirements.txt (line 1)) (1.19.5) Requirement already satisfied: opencv-python==4.5.1.48 in ./depthai/lib/python3.6/site-packages (from -r requirements.txt (line 2)) (4.5.1.48) Requirement already satisfied: requests==2.24.0 in ./depthai/lib/python3.6/site-packages (from -r requirements.txt (line 3)) (2.24.0) Requirement already satisfied: argcomplete==1.12.1 in ./depthai/lib/python3.6/site-packages (from -r requirements.txt (line 4)) (1.12.1) Requirement already satisfied: pyyaml==5.3.1 in ./depthai/lib/python3.6/site-packages (from -r requirements.txt (line 5)) (5.3.1) Collecting depthai==0.4.1.1 Using cached depthai-0.4.1.1-cp36-cp36m-linux_aarch64.whl Requirement already satisfied: importlib-metadata=0.23 in ./depthai/lib/python3.6/site-packages (from argcomplete==1.12.1->-r requirements.txt (line 4)) (2.1.1) Requirement already satisfied: urllib3!=1.25.0,!=1.25.1,=1.21.1 in ./depthai/lib/python3.6/site-packages (from requests==2.24.0->-r requirements.txt (line 3)) (1.25.11) Requirement already satisfied: idna=2.5 in ./depthai/lib/python3.6/site-packages (from requests==2.24.0->-r requirements.txt (line 3)) (2.10) Requirement already satisfied: chardet=3.0.2 in ./depthai/lib/python3.6/site-packages (from requests==2.24.0->-r requirements.txt (line 3)) (3.0.4) Requirement already satisfied: certifi>=2017.4.17 in ./depthai/lib/python3.6/site-packages (from requests==2.24.0->-r requirements.txt (line 3)) (2020.12.5) Requirement already satisfied: zipp>=0.5 in ./depthai/lib/python3.6/site-packages (from importlib-metadata=0.23->argcomplete==1.12.1->-r requirements.txt (line 4)) (3.4.0) Installing collected packages: depthai Successfully installed depthai-0.4.1.1 (depthai) user@jetson-desktop:~/dev/depthai$ **python3 depthai_demo.py** Illegal instruction (core dumped) (depthai) user@jetson-desktop:~/dev/depthai$ **python3** Python 3.6.9 (default, Oct 8 2020, 12:12:24) [GCC 8.4.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> **import depthai** >>> quit() (depthai) user@jetson-desktop:~/dev/depthai$ **python3** Python 3.6.9 (default, Oct 8 2020, 12:12:24) [GCC 8.4.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> **import cv2** Illegal instruction (core dumped) (depthai) user@jetson-desktop:~/dev/depthai$ **python3** Python 3.6.9 (default, Oct 8 2020, 12:12:24) [GCC 8.4.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> **import numpy** Illegal instruction (core dumped)

@"GergelySzabolcs"#p632 I didn't edit, but a git status shows: On branch main Your branch is up to date with 'origin/main'. Changes not staged for commit: (use "git add/rm ..." to update what will be committed) (use "git checkout -- ..." to discard changes in working directory) modified: requirements-optional.txt modified: requirements.txt deleted: resources/nn/openpose deleted: resources/nn/openpose2 Untracked files: (use "git add ..." to include in what will be committed) install_dependencies.sh No idea how those deletes happened... I'm not normally into randomly editing or deleting files that aren't mine, but I've done stranger things... Then I did git reset --hard HEAD git fetch git checkout pi_zero_wheel python3 install_requirements.py python3 depthai_demo.py -rgbf 5 and demo ran successfully. (Oh I had to comment out open3d in requirements-optional.txt) Thanks for the help.

Thanks @"CactusJackFX"#p799 for sharing!

@"CactusJackFX"#p799 thank you, your solution worked for me too on a Jetson Xavier NX! @"Brandon"#4 is the solution for the build on Jetson valid only for Gen 1 at the moment? Do you know if there is there a way to build DepthAI Gen 2 on a Jetson?

@"Brandon"#p834 Thanks a lot Brandon!

Illegal instruction (core dumped) when running depthai demo on jetson xavier nx

rymd80

Seems like I at least partially found the solution, at least for the first error.

I realized that the architecture aarch64 is the key.

opencv-python has a download for aarch64 in 3.4.13.47, and then not again until 4.5.1.

I backed down to opencv to 3.4.13 and opencv-python to 3.4.13.47 and the core dump goes away.

I haven't figured why opencv 4.5.1 doesn't work.

However, now I'm getting an error when downloading the model (I get the same error when attempting to run calibrate):

Note: when I edit depthai/resources/nn/openpose/model.yml, I see references to "human_pose," but nothing for "openpose."

ask_type: human_pose_estimation
files:

name: FP32/human-pose-estimation-0001.xml

python3 depthai_demo.py
No calibration file. Using Calibration Defaults.
Using depthai module from: /home/user/Documents/workspace/projects/face-mask-detector/face-mask-detector/lib/python3.6/site-packages/depthai.cpython-36m-aarch64-linux-gnu.so
Depthai version installed: 0.4.1.1+dev
Depthai development version found, skipping check.
Compiling model for 14 shaves, 14 cmx_slices and 1 NN_engines
model_compilation_target: cloud
In config "/home/user/Documents/workspace/depthai/resources/nn/openpose/model.yml":
In model "openpose":
No XML file for precision "FP32"
Traceback (most recent call last):
File "depthai_demo.py", line 415, in <module>
dai.startLoop()
File "depthai_demo.py", line 45, in startLoop
configMan = DepthConfigManager(args)
File "/home/user/Documents/workspace/depthai/depthai_helpers/config_manager.py", line 26, in init
self.generateJsonConfig()
File "/home/user/Documents/workspace/depthai/depthai_helpers/config_manager.py", line 192, in generateJsonConfig
blobMan = BlobManager(self.args, self.calc_dist_to_bb, shave_nr, cmx_slices, NCE_nr)
File "/home/user/Documents/workspace/depthai/depthai_helpers/config_manager.py", line 377, in init
self.blob_file = self.compileBlob(self.args['cnn_model'], self.args['model_compilation_target'])
File "/home/user/Documents/workspace/depthai/depthai_helpers/config_manager.py", line 431, in compileBlob
ret = download_and_compile_NN_model(nn_model, model_zoo_folder, shave_nr_opt, cmx_slices_opt, NCE_nr, outblob_file, model_compilation_target)
File "/home/user/Documents/workspace/depthai/model_compiler/model_compiler.py", line 154, in download_and_compile_NN_model
download_location = download_model(model, model_zoo_folder)
File "/home/user/Documents/workspace/depthai/model_compiler/model_compiler.py", line 32, in download_model
raise RuntimeError("Model downloader failed!")
RuntimeError: Model downloader failed!

Brandon

rymd80 Sorry about the delay here.

So as an update, there is a related PR here for the build for Jetson (Nano, at least, but I think Xavier should work as well).

https://github.com/luxonis/depthai/pull/329

On the model downloader failing, is the Xavier connected to the internet? And can it access http://luxonis.com:8080/ ?

I'll ask Szabi if he has any ideas on the model downloader as well (he wrote it).

Thanks,
Brandon

GergelySzabolcs

rymd80
Hello.
Can you try on a clean repo?
I think you edited the model.yml. It shouldn't be edited, unless custom model is added.

Openpose is the same as human-pose-estimation-0001, openpose folder is a symlink for backward compatibility.
Just run: python3 depthai_demo.py -cnn openpose

rymd80

GergelySzabolcs

I didn't edit, but a git status shows:

On branch main
Your branch is up to date with 'origin/main'.

Changes not staged for commit:
(use "git add/rm <file>..." to update what will be committed)
(use "git checkout -- <file>..." to discard changes in working directory)

modified:   requirements-optional.txt
modified:   requirements.txt
deleted:    resources/nn/openpose
deleted:    resources/nn/openpose2

Untracked files:
(use "git add <file>..." to include in what will be committed)

install_dependencies.sh

No idea how those deletes happened... I'm not normally into randomly editing or deleting files that aren't mine, but I've done stranger things...

Then I did

git reset --hard HEAD
git fetch
git checkout pi_zero_wheel
python3 install_requirements.py
python3 depthai_demo.py -rgbf 5

and demo ran successfully.

(Oh I had to comment out open3d in requirements-optional.txt)

Thanks for the help.

GergelySzabolcs

rymd80
Good to know, thanks.
The failure of open3d installation is not an error, since it's only optional. (Not supported on all platforms)

CactusJackFX

I know this is a late to the party, but I built OpenCV for my Jetson Xavier AGX, and I too got the error when I tried to use CV2. Here is the information that I found that worked really well to resolve that issue:

CV2 Illegal Instructions Resolution:
add export OPENBLAS_CORETYPE=ARMV8 to your .bashrc should fix it.

Brandon

Thanks CactusJackFX for sharing!

Letty

CactusJackFX thank you, your solution worked for me too on a Jetson Xavier NX!

@Brandon is the solution for the build on Jetson valid only for Gen 1 at the moment? Do you know if there is there a way to build DepthAI Gen 2 on a Jetson?

Brandon

Letty So @themarpe actually knows on this. I risk being wrong on the Jetson build for Gen2. I've only personally built Gen1 on Jetson.

And I think @themarpe is actually adding Jetson (aarch64) series to our CI/CD next week so that these will be pre-built along with Ubuntu-AM64/Raspberry Pi OS/macOS/Windows. We had been meaning to do this earlier, but just a bit behind.

So potentially Martin may reply with build instructions and that it is now prebuilt. :-).

Best,
Brandon

Letty

Brandon Thanks a lot Brandon!

Brandon

I meant to circle back @Letty that this is actually already ready (as of 21 hours ago):

https://github.com/luxonis/depthai-python/pull/158

Letty

Brandon Thanks a lot!