出现此错误的原因是什么？如何修复？我正在运行此回购中的代码：https://github.com/facebookresearch/frankmocap
(frank) mona@goku:~/research/code/frankmocap$ python -m demo.demo_frankmocap --input_path ./sample_data/han_short.mp4 --out_dir ./mocap_output
Traceback (most recent call last):
File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/mona/research/code/frankmocap/demo/demo_frankmocap.py", line 25, in <module>
from handmocap.hand_bbox_detector import HandBboxDetector
File "/home/mona/research/code/frankmocap/handmocap/hand_bbox_detector.py", line 33, in <module>
from detectors.hand_object_detector.lib.model.roi_layers import nms # might raise segmentation fault at the end of program
File "/home/mona/research/code/frankmocap/detectors/hand_object_detector/lib/model/roi_layers/__init__.py", line 3, in <module>
from .nms import nms
File "/home/mona/research/code/frankmocap/detectors/hand_object_detector/lib/model/roi_layers/nms.py", line 3, in <module>
from model import _C
ImportError: /home/mona/research/code/frankmocap/detectors/hand_object_detector/lib/model/_C.cpython-38-x86_64-linux-gnu.so: undefined symbol: _ZN6caffe28TypeMeta21_typeMetaDataInstanceIdEEPKNS_6detail12TypeMetaDataEv
我有：
$ lsb_release -a
LSB Version: core-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal
和
$ python
Python 3.8.5 (default, Jan 27 2021, 15:41:15)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import torch
>>> torch.__version__
'1.8.1+cu111'
>>> import detectron2
>>> detectron2.__version__
'0.4'
>>> from detectron2 import _C
和：
$ python -m detectron2.utils.collect_env
/home/mona/venv/frank/lib/python3.8/site-packages/torch/cuda/__init__.py:52: UserWarning: CUDA initialization: Unexpected error from cudaGetDeviceCount(). Did you run some cuda functions before calling NumCudaDevices() that might have already set an error? Error 804: forward compatibility was attempted on non supported HW (Triggered internally at /pytorch/c10/cuda/CUDAFunctions.cpp:109.)
return torch._C._cuda_getDeviceCount() > 0
No CUDA runtime is found, using CUDA_HOME='/usr'
--------------------- --------------------------------------------------------------------------
sys.platform linux
Python 3.8.5 (default, Jan 27 2021, 15:41:15) [GCC 9.3.0]
numpy 1.19.5
detectron2 0.4 @/home/mona/venv/frank/lib/python3.8/site-packages/detectron2
Compiler GCC 7.3
CUDA compiler CUDA 11.1
DETECTRON2_ENV_MODULE <not set>
PyTorch 1.8.1+cu111 @/home/mona/venv/frank/lib/python3.8/site-packages/torch
PyTorch debug build False
GPU available False
Pillow 8.1.0
torchvision 0.9.1+cu111 @/home/mona/venv/frank/lib/python3.8/site-packages/torchvision
fvcore 0.1.3.post20210311
cv2 4.5.1
--------------------- --------------------------------------------------------------------------
PyTorch built with:
- GCC 7.3
- C++ Version: 201402
- Intel(R) Math Kernel Library Version 2020.0.0 Product Build 20191122 for Intel(R) 64 architecture applications
- Intel(R) MKL-DNN v1.7.0 (Git Hash 7aed236906b1f7a05c0917e5257a1af05e9ff683)
- OpenMP 201511 (a.k.a. OpenMP 4.5)
- NNPACK is enabled
- CPU capability usage: AVX2
- Build settings: BLAS_INFO=mkl, BUILD_TYPE=Release, CUDA_VERSION=11.1, CUDNN_VERSION=8.0.5, CXX_COMPILER=/opt/rh/devtoolset-7/root/usr/bin/c++, CXX_FLAGS= -Wno-deprecated -fvisibility-inlines-hidden -DUSE_PTHREADPOOL -fopenmp -DNDEBUG -DUSE_KINETO -DUSE_FBGEMM -DUSE_QNNPACK -DUSE_PYTORCH_QNNPACK -DUSE_XNNPACK -O2 -fPIC -Wno-narrowing -Wall -Wextra -Werror=return-type -Wno-missing-field-initializers -Wno-type-limits -Wno-array-bounds -Wno-unknown-pragmas -Wno-sign-compare -Wno-unused-parameter -Wno-unused-variable -Wno-unused-function -Wno-unused-result -Wno-unused-local-typedefs -Wno-strict-overflow -Wno-strict-aliasing -Wno-error=deprecated-declarations -Wno-stringop-overflow -Wno-psabi -Wno-error=pedantic -Wno-error=redundant-decls -Wno-error=old-style-cast -fdiagnostics-color=always -faligned-new -Wno-unused-but-set-variable -Wno-maybe-uninitialized -fno-math-errno -fno-trapping-math -Werror=format -Wno-stringop-overflow, LAPACK_INFO=mkl, PERF_WITH_AVX=1, PERF_WITH_AVX2=1, PERF_WITH_AVX512=1, TORCH_VERSION=1.8.1, USE_CUDA=ON, USE_CUDNN=ON, USE_EXCEPTION_PTR=1, USE_GFLAGS=OFF, USE_GLOG=OFF, USE_MKL=ON, USE_MKLDNN=ON, USE_MPI=OFF, USE_NCCL=ON, USE_NNPACK=ON, USE_OPENMP=ON,
当安装的pytorch版本和检测器库版本(Detectron2或mmdet(之间存在兼容性问题时，通常会出现此错误。
检测器库和pytorch都必须由同一个CUDA版本构建，否则在训练模型时某些包会发生冲突。
您拥有的Pytorch(1.8.1(+CUDA版本(11.1(可能与detectron2v(0.4(不兼容。
从这里的回购来看，detectron2 v0.4是用torch 1.8+cuda 11.1构建的。如果使用torch 1.8.0而不是1.8.1，可能会有所帮助
我尝试了这里提到的解决方案，但没有完全解决问题。然而，当我尝试使用这个解决方案解决不同的错误时，它也为我解决了这个错误。使用以下命令：
pip install torch==1.8.0+cu111 torchvision==0.9.0+cu111 torchaudio==0.8.0 -f https://download.pytorch.org/whl/torch_stable.html
好吧，我也遇到了这个问题。这意味着静态库/home/mona/research/code/frankmocap/detectors/hand_object_detector/lib/model/_C.cpython-38-x86_64-linux-gnu.so不适合这个程序。我猜你重新安装了手电筒或探测器之类的东西。
要解决此问题，请尝试重新安装detectron2并删除frankmocap中的detectors目录，然后使用./scripts/install_frankmocap.sh./scripts/install_hand_detectors.sh和./scripts/install_pose2d.sh来重建frankmocp所需的库。
毕竟，也许您需要将_C.cpython-38-x86_64-linux-gnu.so从detectors/hand_object_detector/lib/build/lib.linux-x86_64-3.6/model复制到detectors/hand_object_detector/lib/model。也许不是
我最近遇到了这个问题，使用下面的参数创建一个新环境解决了我的问题。
附言：我假设你正在使用CUDA的torch，如果你没有，你可以安装非GPU版本
torch version : 1.9 + cu111
torchvision : 0.10.0 + cu111
torchaudio : 0.9.0
您可以从下载这些；
pip install torch==1.9.0+cu111 torchvision==0.10.0+cu111 torchaudio==0.9.0 -f
对于Detectron2；
python -m pip install detectron2 -f
https://dl.fbaipublicfiles.com/detectron2/wheels/cu111/torch1.9/index.html
https://download.pytorch.org/whl/torch_stable.html
PyTorch早期版本链接的来源