行业门户网站是什么,互联网技术应用,外贸soho自己建站,长沙小升初有什么做试卷的网站文章目录 环境编译流程nasm编译x264编译zlib编译libJPEG编译libPNG编译libtiff编译 FFmpeg编译OpenCV编译问题1解决方案 问题2解决方案 总结 环境
系统#xff1a;Ubutu 18.04交叉编译链#xff1a;gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu 我的路径/opt/toolch… 文章目录 环境编译流程nasm编译x264编译zlib编译libJPEG编译libPNG编译libtiff编译 FFmpeg编译OpenCV编译问题1解决方案 问题2解决方案 总结 环境
系统Ubutu 18.04交叉编译链gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu 我的路径/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gccOpenCV 3.4.16FFmpeg n3.4.12zlib 1.3.1好多包找不到哪里下的了备份在这里
编译流程
nasm编译
下载源码并解压mkdir build cd build../configure --hostaarch64-linux --prefix/home/lei/RK_Lib/nasm-lib --enable-shared CC/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gcc --disable-asm
x264编译
下载源码并解压mkdir build cd build../configure --enable-shared --enable-static --disable-asm --prefix/home/lei/RK_Lib/x264-lib --hostaarch64-linux --cross-prefix/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu- --extra-libs-ldl --disable-opencl
zlib编译
下载源码并解压mkdir build cd build../configure --prefix/home/lei/RK_Lib/zlib-lib 修改makefile 替换gcc为/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gcc
libJPEG编译
下载源码并解压mkdir build cd build../configure CC/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gcc --hostaarch64-linux --prefix/home/lei/RK_Lib/JPEG-lib --enable-shared --enable-static
libPNG编译
下载源码并解压mkdir build cd build将zlib 下的inlcue中的文件和lib中的文件拷贝交叉编译器下的目录/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/include lib../configure CC/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gcc --hostaarch64-linux --prefix/home/lei/RK_Lib/PNG-lib --enable-shared --enable-static
libtiff编译
下载源码并解压mkdir build cd build../configure CC/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gcc CXX/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-g --hostarm-linux --prefix/home/lei/RK_Lib/tiff-lib --enable-shared --enable-static
FFmpeg编译
下载源码并解压mkdir build cd build创建/home/lei/RK_Lib/arm-lib/include 和 /home/lei/RK_Lib/arm-lib/lib并将x264和zlib编译出的include和lib复制进去../configure --enable-shared --enable-static --prefix/home/lei/RK_Lib/ffmpeg-lib3 --cross-prefix/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu- --archaarch64 --target-oslinux --enable-gpl --enable-ffmpeg --enable-libx264 --enable-zlib --enable-avresample --extra-cflags-I/home/lei/RK_Lib/arm-lib/include --extra-ldflags-L/home/lei/RK_Lib/arm-lib/lib
OpenCV编译
下载源码并解压mkdir build cd build将编译出的FFmpeg的include和lib也复制到/home/lei/RK_Lib/arm-lib/include 和 /home/lei/RK_Lib/arm-lib/lib/home/lei/RK_Lib/arm-lib目录下创建ffmpeg-config.cmake并编辑
set(ffmpeg_path ${CMAKE_CURRENT_LIST_DIR})message(ffmpeg_path: ${ffmpeg_path})set(FFMPEG_EXEC_DIR ${ffmpeg_path}/bin)
set(FFMPEG_LIBDIR ${ffmpeg_path}/lib)
set(FFMPEG_INCLUDE_DIRS ${ffmpeg_path}/include)# library names
set(FFMPEG_LIBRARIES${FFMPEG_LIBDIR}/libavformat.so${FFMPEG_LIBDIR}/libavdevice.so${FFMPEG_LIBDIR}/libavcodec.so${FFMPEG_LIBDIR}/libavutil.so${FFMPEG_LIBDIR}/libswscale.so${FFMPEG_LIBDIR}/libswresample.so${FFMPEG_LIBDIR}/libavfilter.so${FFMPEG_LIBDIR}/libavresample.so${FFMPEG_LIBDIR}/libz.so${FFMPEG_LIBDIR}/libx264.so
)# found status
set(FFMPEG_libavformat_FOUND TRUE)
set(FFMPEG_libavdevice_FOUND TRUE)
set(FFMPEG_libavcodec_FOUND TRUE)
set(FFMPEG_libavutil_FOUND TRUE)
set(FFMPEG_libswscale_FOUND TRUE)
set(FFMPEG_libswresample_FOUND TRUE)
set(FFMPEG_libavfilter_FOUND TRUE)
set(FFMPEG_libavresample_FOUND TRUE)# library versions, 注意这几个变量一定要设置为全局CACHE变量
set(FFMPEG_libavutil_VERSION 55.78.100 CACHE INTERNAL FFMPEG_libavutil_VERSION) # info
set(FFMPEG_libavcodec_VERSION 57.107.100 CACHE INTERNAL FFMPEG_libavcodec_VERSION) # info
set(FFMPEG_libavformat_VERSION 57.83.100 CACHE INTERNAL FFMPEG_libavformat_VERSION) # info
set(FFMPEG_libavdevice_VERSION 57.10.100 CACHE INTERNAL FFMPEG_libavdevice_VERSION) # info
set(FFMPEG_libavfilter_VERSION 6.107.100 CACHE INTERNAL FFMPEG_libavfilter_VERSION) # info
set(FFMPEG_libswscale_VERSION 4.8.100 CACHE INTERNAL FFMPEG_libswscale_VERSION) # info
set(FFMPEG_libswresample_VERSION 2.9.100 CACHE INTERNAL FFMPEG_libswresample_VERSION) # info
set(FFMPEG_libavresample_VERSION 3.7.0 CACHE INTERNAL FFMPEG_libavresample_VERSION) # infoset(FFMPEG_FOUND TRUE)
set(FFMPEG_LIBS ${FFMPEG_LIBRARIES})status( #################################### FFMPEG: FFMPEG_FOUND THEN YES (find_package) ELSE NO (find_package))
status( avcodec: FFMPEG_libavcodec_VERSION THEN YES (${FFMPEG_libavcodec_VERSION}) ELSE NO)
status( avformat: FFMPEG_libavformat_VERSION THEN YES (${FFMPEG_libavformat_VERSION}) ELSE NO)
status( avutil: FFMPEG_libavutil_VERSION THEN YES (${FFMPEG_libavutil_VERSION}) ELSE NO)
status( swscale: FFMPEG_libswscale_VERSION THEN YES (${FFMPEG_libswscale_VERSION}) ELSE NO)
status( avresample: FFMPEG_libavresample_VERSION THEN YES (${FFMPEG_libavresample_VERSION}) ELSE NO)注意这里需要把zlib和x264的库文件也指定好 -进入opencv/build目录下执行 vim toolchain.cmake并写入以下内容具体路径自行指定
set( CMAKE_SYSTEM_NAME Linux )
set( CMAKE_SYSTEM_PROCESSOR aarch64 )
set( CMAKE_C_COMPILER /opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gcc )
set( CMAKE_CXX_COMPILER /opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-g )
set( CMAKE_FIND_ROOT_PATH /home/lei/RK_Lib/arm-lib/lib )
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )修改OpenCV的CMakeLists.txt
# opencv.hpp and legacy headers
link_directories(/home/lei/RK_Lib/arm-lib/lib) # 添加这句
add_subdirectory(include)修改OpenCVFindLibsVideo.cmake把message(FATAL_ERROR FFMPEG: test check build log:\n${TRY_OUT})取消注释以便查看FFmpeg编译输出信息 终端执行
cmake -D CMAKE_TOOLCHAIN_FILEtoolchain.cmake \-D BUILD_opencv_python3yes -D BUILD_opencv_python2no -D PYTHON3_EXECUTABLE/usr/bin/python3.6m -D PYTHON3_INCLUDE_DIR/usr/include/python3.6m -D PYTHON3_LIBRARY/usr/lib/x86_64-linux-gnu/libpython3.6m.so -D PYTHON3_PACKAGES_PATH/usr/lib/python3/dist-packages -D PYTHON_DEFAULT_EXECUTABLE/usr/bin/python3.6m \-D CMAKE_BUILD_TYPERELEASE -D CMAKE_INSTALL_PREFIX/home/lei/RK_Lib/opencv-lib \ -D BUILD_ZLIBON -D BUILD_JPEGON -D BUILD_PNGON -D BUILD_TIFFON \-D ENABLE_CXX11ON \-D WITH_FFMPEGON -D WITH_OPENCLON -D WITH_GTKOFF -D WITH_OPENGLON -D WITH_ZLIBON -D WITH_OPENMPON -D WITH_PNGON \-D BUILD_SHARED_LIBSOFF \
-D CMAKE_FIND_ROOT_PATH/home/lei/RK_Lib/arm-lib \
-D BUILD_TESTSON \
-D FFMPEG_INCLUDE_DIRS/home/lei/RK_Lib/arm-lib/include \
-D OPENCV_GENERATE_PKGCONFIGON \
-D OPENCV_FFMPEG_USE_FIND_PACKAGEON \
-D OPENCV_FFMPEG_SKIP_BUILD_CHECKON \
-D FFMPEG_DIR/home/lei/RK_Lib/arm-lib \
..执行make -j8执行make install
问题1 执行config出现ffmpeg为NO 解决方案
一开始确实遇到了这个问题添加ffmpeg-config.cmake等文件后可以解决。
问题2 这里我没找到很好的解决方案按照下面的方案解决需要重复修改link.txt文件若干次…慢慢来吧这玩意确实需要耐心。
解决方案
比如进入path/opencv-3.4.16/build/modules/videoio/CMakeFiles/opencv_test_videoio.dir目录下修改link.txt在/opt/toolchain/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-g后面添加 -Wl,-rpath-link,/home/lei/RK_Lib/arm-lib/lib并保存重新执行make
反正就是找不到哪个库就-rpath到哪个库的文件夹
总结
交叉编译真麻烦…
