ffmpeg+opencv交叉编译

编译器：Linaro Releases

gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz

先配置编译器：

export TOOLCHAIN_DIR=/home/yxt/workspace/rknn/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/

export CROSS_COMPILE=${TOOLCHAIN_DIR}/bin/aarch64-linux-gnu-

export CC=${CROSS_COMPILE}gcc

原文链接：https://blog.csdn.net/qq_21331593/article/details/135275482

x264:

CC="$CC" ./configure --enable-shared --enable-static --host=aarch64-linux-gnu --disable-asm --prefix=/home/yxt/workspace/3rd/arm64/

ffmpeg:
./configure --prefix=/home/yxt/workspace/3rd/arm64/ --enable-shared --enable-static --extra-ldflags=-L/home/yxt/workspace/3rd/arm64/lib --extra-cflags=-I/home/yxt/workspace/3rd/arm64/include --enable-gpl --enable-cross-compile --arch=aarch64 --disable-stripping --target-os=linux --enable-libx264 --cc="$CC" --enable-swscale  --pkg-config=PKGCONFIG 

opencv:
cmake -DWITH_FFMPEG=ON cmake -DCMAKE_INSTALL_PREFIX=../install -DBUILD_PNG=ON -DPNG_LIBRARY=/home/yxt/workspace/3rd/libpng-1.6.37/build/lib/libpng.so -D PNG_PNG_INCLUDE_DIR=/home/yxt/workspace/3rd/libpng-1.6.37/build/include/ -DCMAKE_TOOLCHAIN_FILE=../toolchain.cmake ..

export PKG_CONFIG_LIBDIR=/home/yxt/workspace/3rd/arm64/lib/pkgconfig

libpng:
export LDFLAGS="-L/home/yxt/workspace/3rd/zlib-1.2.8/build/lib"
export CPPFLAGS="-I/home/yxt/workspace/3rd/zlib-1.2.8/build/include/"
CC="$CC" ./configure --enable-arm-neon=yes --prefix=/home/yxt/workspace/3rd/libpng-1.6.37/build/ --host=arm-linux

cmakelists.txt add:
set(ARM 1)
set(ENABLE_NEON 1)

zlib:
export CC=
CC="$CC" ./configure --prefix=/home/yxt/workspace/3rd/zlib-1.2.8/build/
make