在Mac上为Android编译ffmpeg [英] Compiling ffmpeg for android on Mac

问题描述

我试图在Mac上为Android编译ffmpeg，但对我而言不起作用.

I tried to compile ffmpeg for android on Mac, but it does not work for me.

#!/bin/bash
NDK=/Users/user/Library/Android/sdk/ndk-bundle
SYSROOT=$NDK/platforms/android-18/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64

function build_one
{
    ./configure \
    --prefix=$PREFIX \
    --enable-shared \
    --disable-static \
    --disable-doc \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-network \
    --disable-filters \
    --disable-avdevice \
    --disable-doc \
    --disable-symver \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --target-os=linux \
    --arch=arm \
    --enable-cross-compile \
    --sysroot=$SYSROOT \
    --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
    --extra-ldflags="$ADDI_LDFLAGS" \
    $ADDITIONAL_CONFIGURE_FLAG

    make clean all
    make
    make install
}

CPU=arm
PREFIX=$(pwd)/android/$CPU 
ADDI_CFLAGS="-marm"

build_one

我还通过chmod +x build_script.sh

我尝试了ffmpeg 4.1和4.0.3，但是都无法正常工作，并且错误原因相同.

I tried ffmpeg 4.1 and 4.0.3 but both are not work and same error reason.

我也尝试过android-21和android-18

test_cpp_condition stddef.h defined __ARM_ARCH_4__ || defined __TARGET_ARCH_4
test_cpp
BEGIN /tmp/ffconf.bgSdFwkD/test.c
    1   #include <stddef.h>
    2   #if !(defined __ARM_ARCH_4__ || defined __TARGET_ARCH_4)
    3   #error "unsatisfied condition: defined __ARM_ARCH_4__ || defined __TARGET_ARCH_4"
    4   #endif
END /tmp/ffconf.bgSdFwkD/test.c
/Users/user/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/Users/user/Library/Android/sdk/ndk-bundle/platforms/android-21/arch-arm/ -Os -fpic -marm -E -o /tmp/ffconf.bgSdFwkD/test.o /tmp/ffconf.bgSdFwkD/test.c
/tmp/ffconf.bgSdFwkD/test.c:3:2: error: "unsatisfied condition: defined __ARM_ARCH_4__ || defined __TARGET_ARCH_4"
#error "unsatisfied condition: defined __ARM_ARCH_4__ || defined __TARGET_ARCH_4"
 ^
1 error generated.
test_cpp_condition stddef.h defined __ARM_ARCH_4T__ || defined __TARGET_ARCH_4T
test_cpp
BEGIN /tmp/ffconf.bgSdFwkD/test.c
    1   #include <stddef.h>
    2   #if !(defined __ARM_ARCH_4T__ || defined __TARGET_ARCH_4T)
    3   #error "unsatisfied condition: defined __ARM_ARCH_4T__ || defined __TARGET_ARCH_4T"
    4   #endif
END /tmp/ffconf.bgSdFwkD/test.c
/Users/user/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/Users/user/Library/Android/sdk/ndk-bundle/platforms/android-21/arch-arm/ -Os -fpic -marm -E -o /tmp/ffconf.bgSdFwkD/test.o /tmp/ffconf.bgSdFwkD/test.c
test_ld cc
test_cc
BEGIN /tmp/ffconf.bgSdFwkD/test.c
    1   int main(void){ return 0; }
END /tmp/ffconf.bgSdFwkD/test.c
/Users/user/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/Users/user/Library/Android/sdk/ndk-bundle/platforms/android-21/arch-arm/ -Os -fpic -marm -march=armv4t -c -o /tmp/ffconf.bgSdFwkD/test.o /tmp/ffconf.bgSdFwkD/test.c
/Users/user/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/Users/user/Library/Android/sdk/ndk-bundle/platforms/android-21/arch-arm/ -march=armv4t -o /tmp/ffconf.bgSdFwkD/test /tmp/ffconf.bgSdFwkD/test.o
ld: unknown option: --sysroot=/Users/user/Library/Android/sdk/ndk-bundle/platforms/android-21/arch-arm/
clang: error: linker command failed with exit code 1 (use -v to see invocation)
C compiler test failed.

是否需要额外安装任何工具/应用程序或库来进行编译?我很困惑....(这个问题可能对我没有作用，但没有解决办法)

Is there any tools/Applications or libraries I have to additionally install for compiling? I'm confused.... (THIS QUESTION IS MAY DUPLICATE BUT NONE OF SOLUTION WAS WORKED FOR ME)

编辑以阐明我的系统环境.

EDIT To clarify my system environment.

• Mac OS X High Sierra(10.13.6)
• Android NDK(18.1.5063045)
• Android SDK工具和SDK构建工具
• CMake

编辑，我也尝试了ffmpeg版本3.3.9，但它也不起作用.

EDIT I also tried ffmpeg version 3.3.9 but it does not work either.

推荐答案

我是通过 Android Studio 安装了NDK的，我认为这是问题所在，因此我手动下载了Android NDK，现在可以进行配置了并运行makefile.

I was installed NDK through Android Studio and I think it was the problem, so I downloaded Android NDK manually and now I can configure and run the makefile.

等等！还没做完.当我使用最新的稳定NDK(r16b)运行makefile时，它说:
./libavutil/common.h:33:19: fatal error: errno.h: No such file or directory

Wait! Not done yet. When I ran makefile with latest stable NDK (r16b), it says:
./libavutil/common.h:33:19: fatal error: errno.h: No such file or directory

根据

According to this document, so I tried using NDK r15c and it finally works for me.

总结我如何解决此问题:手动安装NDK r15c ，不要忘记更新您的Shell脚本文件！

To summarize how I solve this problem: Manually install NDK r15c and DON'T FORGET update your shell script file!

希望得到帮助！

这篇关于在Mac上为Android编译ffmpeg的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！