【RV1126B】opencv交叉编译with ffmepg

1. 交叉编译ffmpeg

bash 复制代码

(base) mahxn0@toy:~/workspace/rv1126B/FFmpeg-n7.0$ cat build.sh
export TOOLCHAIN=/opt/rv1126B/arm-rockchip1240-linux-gnueabihf
export SYSROOT=$TOOLCHAIN/arm-rockchip1240-linux-gnueabihf/sysroot
export CROSS_PREFIX=$TOOLCHAIN/bin/arm-rockchip1240-linux-gnueabihf-
export PREFIX=/opt/ffmpeg-arm32
#FOR STATIC
#./configure \
#    --prefix=$PREFIX \
#    --arch=arm \
#    --target-os=linux \
#    --cross-prefix=$CROSS_PREFIX \
#    --enable-cross-compile \
#    --enable-gpl \
#    --enable-nonfree \
#    --enable-pic \
#    --enable-static \
#    --disable-shared \
#    --disable-doc \
#    --disable-debug \
#    --enable-small \
#    --enable-neon \
#    --cpu=armv7-a \
#    --extra-cflags="-mfpu=neon -mfloat-abi=hard" \
#    --extra-ldflags="" \
#    --enable-asm

#FOR SHARED
./configure \
    --prefix=$PREFIX \
    --arch=arm \
    --cpu=armv7-a \
    --target-os=linux \
    --cross-prefix=$CROSS_PREFIX \
    --enable-cross-compile \
    --enable-shared \
    --disable-static \
    --enable-pic \
    --enable-gpl \
    --enable-nonfree \
    --enable-small \
    --enable-neon \
    --enable-asm \
    --disable-debug \
    --disable-doc \
    --extra-cflags="-mfpu=neon -mfloat-abi=hard --sysroot=$SYSROOT" \
    --extra-ldflags="--sysroot=$SYSROOT"

2. 交叉编译opencv

设置ffmpeg的环境变量

bash 复制代码

export PKG_CONFIG_PATH=/opt/ffmpeg-arm32/lib/pkgconfig:$PKG_CONFIG_PATH 
export PKG_CONFIG_LIBDIR=/opt/ffmpeg-arm32/lib:$PKG_CONFIG_LIBDIR
export LD_LIBRARY_PATH=/opt/ffmpeg-arm32/lib:$LD_LIBRARY_PATH

生成tool_chain.cmake

bash 复制代码

SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_SYSTEM_PROCESSOR armv7)

#SET(CMAKE_SYSROOT /opt/linux-x86/aarch64/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/aarch64-none-linux-gnu/libc)

#SET(CMAKE_C_COMPILER /opt/linux-x86/aarch64/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-gcc)
#SET(CMAKE_CXX_COMPILER /opt/linux-x86/aarch64/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-g++)

#FOR ARM

SET(CMAKE_SYSROOT /opt/rv1126B/arm-rockchip1240-linux-gnueabihf/arm-rockchip1240-linux-gnueabihf/sysroot)
SET(CMAKE_C_COMPILER /opt/rv1126B/arm-rockchip1240-linux-gnueabihf/bin/arm-rockchip1240-linux-gnueabihf-gcc)
SET(CMAKE_CXX_COMPILER /opt/rv1126B/arm-rockchip1240-linux-gnueabihf/bin/arm-rockchip1240-linux-gnueabihf-g++)

SET(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

编译

bash 复制代码

cmake -DCMAKE_INSTALL_PREFIX=../install -DENABLE_NEON=ON -DOPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.12.0/modules -DWITH_FFMPEG=ON -DCMAKE_TOOLCHAIN_FILE=../tool_chain.cmake -DFFMPEG_INCLUDE_DIR=/opt/ffmpeg-arm32/include -DFFMPEG_LIB_DIR=/opt/ffmpeg-arm32/lib -DCMAKE_CXX_FLAGS="-march=armv7-a" -DCMAKE_C_FLAGS="-march=armv7-a" ..

复制代码