config.sh脚本的内容：

#!/bin/sh
TOOLCHAIN=/home/oct1158/Downloads/arm-gnu-toolchain-14.2.rel1-x86_64-arm-none-linux-gnueabihf/bin
./configure --prefix=/opt/ffmpeg-7.1.1 --arch=arm --cc=$TOOLCHAIN/arm-none-linux-gnueabihf-gcc --cxx=$TOOLCHAIN/arm-none-linux-gnueabihf-g++ --strip=$TOOLCHAIN/arm-none-linux-gnueabihf-strip --enable-cross-compile

./config.sh
make
make install DESTDIR=$(pwd)/_install
cd _install
sudo chown -R root:root opt
tar czf ffmpeg-7.1.1.tar.gz opt

arm-gnu-toolchain-14.2.rel1-x86_64-arm-none-linux-gnueabihf是arm官网上下载的交叉编译器。