将pytorch 模型转为 ncnn模型

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原创最新推荐文章于 2026-07-09 16:51:01 发布 1k 阅读 AI 写同款· GEO 优化 ›

pytorch模型（pth，pkl）转ncnn（中介onnx）（附搭建ncnn教程） pytorch模型（pth，pkl）转ncnn（中介onnx）（附搭建ncnn教程）文章目录pytorch模型（pth，pkl）转ncnn（中介onnx）（附搭建ncnn教程）部署ncnn在windows上部署ncnn（基于VS2019）在Ubuntu18.04上部署ncnnpytorch模型转onnx（以TDnet为例）onnx转ncnn 部署ncnn pytorch转ncnn是要在电脑上部署好ncnn环境，下图为可部署ncnn的平台在windows上部署ncnn（基于VS2019）一.安装VS2 阅读详情

将pytorch 模型转为 ncnn模型（vs 2019 ）

文章目录

将pytorch 模型转为 ncnn模型（vs 2019 ）

step 1 pth文件转为onnx文件

具体步骤可以参考：https://github.com/ultralytics/yolov5/blob/master/export.py
和https://blog.youkuaiyun.com/weixin_44753371/article/details/119328952的step1

step2:.onnx转ncnn模型

编译protobuf-3.4.0

下载 protobuf-3.4.0 https://github.com/google/protobuf/archive/v3.4.0.zip

cd <protobuf-root-dir>
mkdir build
cd build
cmake -G"NMake Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%cd%/install -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_MSVC_STATIC_RUNTIME=OFF ../cmake
nmake
nmake install

Build ncnn library

cd <ncnn-root-dir>
mkdir -p build
cd build
cmake -G"NMake Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%cd%/install -DProtobuf_INCLUDE_DIR=<protobuf-root-dir>/build/install/include -DProtobuf_LIBRARIES=<protobuf-root-dir>/build/install/lib/libprotobuf.lib -DProtobuf_PROTOC_EXECUTABLE=<protobuf-root-dir>/build/install/bin/protoc.exe ..
nmake
nmake install

或：

cd <ncnn-root-dir>
mkdir -p build
cd build
cmake -G"Visual Studio 16 2019" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%cd%/install -DProtobuf_INCLUDE_DIR=<protobuf-root-dir>/src -DProtobuf_LIBRARIES=<protobuf-root-dir>/build-vs2019/Release/libprotobuf.lib -DProtobuf_PROTOC_EXECUTABLE=<protobuf-root-dir>/build-vs2019/Release/protoc.exe ..

cmake --build . --config Release

[option] -DNCNN_VULKAN=ON …

\build\tools\onnx\Release 路径下可以找到onnx2ncnn.exe文件.

onnx模型转为ncnn

cd <ncnn-root-dir>\build\tools\onnx\Release
onnx2nccn.exe <onnxfilepath> 
# 当前目录下就会出现ncnn.bin,ncnn.param文件

step2 报错处理

1：nmake not find

找到nmake.exe文件的位置然后加入PATH环境变量：

D:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.16.27023\bin\HostX64\x64

2： RC Pass 1: command “rc /fo CMakeFiles\cmTC_deb0b.dir/manifest.res CMakeFiles\cmTC_deb0b.dir/manifest.rc” failed (exit code 0) with the following output:
系统找不到指定的文件。NMAKE : fatal error U1077: ““D:\Program Files\CMake\bin\cmake.exe””: 返回代码“0xffffffff”
Stop.
NMAKE : fatal error U1077: ““D:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.16.27023\bin\HostX64\x64\nmake.exe””: 返回代码“0x2”
Stop.

找到rc.exe文件的位置加入path

C:\Program Files (x86)\Windows Kits\10\bin\10.0.17763.0\x64\rc.exe

将step2 的build目录清空并且将命令替换为：

参考自：https://github.com/Tencent/ncnn/issues/2549

cd <protobuf-root-dir>
mkdir build
cd build
cmake -G"Visual Studio 16 2019" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%cd%/install -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_MSVC_STATIC_RUNTIME=OFF ../cmake

cmake --build . --config Release

cmake -G"Visual Studio 16 2019" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%cd%/install -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_MSVC_STATIC_RUNTIME=OFF …/cmake

运行结果如下所示：

cmake --build . --config Release 运行结果如下：

Visual Studio 17 2022        = Generates Visual Studio 2022 project files.
                                 Use -A option to specify architecture.

* Visual Studio 16 2019        = Generates Visual Studio 2019 project files.
        Use -A option to specify architecture.
    Visual Studio 15 2017 [arch] = Generates Visual Studio 2017 project files.
                                   Optional [arch] can be "Win64" or "ARM".
    Visual Studio 14 2015 [arch] = Generates Visual Studio 2015 project files.
                                   Optional [arch] can be "Win64" or "ARM".
    Visual Studio 12 2013 [arch] = Generates Visual Studio 2013 project files.
                                   Optional [arch] can be "Win64" or "ARM".
    Visual Studio 11 2012 [arch] = Generates Visual Studio 2012 project files.
                                   Optional [arch] can be "Win64" or "ARM".
    Visual Studio 10 2010 [arch] = Generates Visual Studio 2010 project files.
                                   Optional [arch] can be "Win64" or "IA64".
    Visual Studio 9 2008 [arch]  = Generates Visual Studio 2008 project files.
                                   Optional [arch] can be "Win64" or "IA64".

报错信息：CMake Error at CMakeLists.txt:265 (message):
The submodules were not downloaded! Please update submodules with “git
submodule update --init” and try again.
```
# 不要使用download zip 下载 ncnn，使用git clone 下载
git clone https://github.com.cnpmjs.org/Tencent/ncnn.git
cd ncnn
git  submodule update --init
# 然后执行step2 ncnn编译操作
```
ncnn编译成功后如下图所示：

cmake --build . --config Release 运行结果如下：

参考链接：

https://github.com/Tencent/ncnn/issues/2549
https://blog.youkuaiyun.com/weixin_44753371/article/details/119328952
https://github.com/ultralytics/yolov5/blob/master/export.py

https://github.com/Tencent/ncnn/wiki/how-to-build#build-for-windows-x64-using-visual-studio-community-2017