//EDIT节省时间并参考SF项目。IMO,它可以节省大量的工作来加快速度.....
在这个问题上做更多工作后:
添加了一个git项目
安装自定义工具链后构建更容易,因此您可以轻松调用编译器
来自ndk-build 的示例标准输出
-- 最初在 windows vista 上的 vmplayer 中使用 ubuntu 12.04。IMO linux 比 cygwin 更适合构建。
我按照这些说明获得不确定的结果,其中存在以下条件。
build_android.sh 似乎正常退出
config.log 有错误,从 crosstoolchain 确认 gcc
所有静态库都构建正常(./libavfilter,./libavcodec 等)
ffmpeg.o 在那里并且执行 ok
no ./android 目录按照配置的前缀设置
看起来我可以将二进制文件推送到我的手机并在 shell 中进行测试。如果没关系,那么我可以查看静态库的 jni 包装器。
但是为什么构建没有向 --prefix=./android/armv7-a 写入任何内容?该路径在构建结束时不存在
细节:
配置日志处理了什么:
FFMPEG_CONFIGURATION='--target-os=linux --prefix=./android/armv7-a
--enable-libvpx --enable-libvorbis --enable-pthreads --logfile=config.log
--enable-cross-compile --extra-libs=-lgcc --arch=arm
--cc=/home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc
--cross-prefix=/home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-
--nm=/home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-nm
--sysroot=/home/rob/src/android-ndk-r8/platforms/android-14/arch-arm/ --extra-cflags='"'"' -O3 -fpic
-DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums
-fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -marm -march=armv7-a -mtune=cortex-a9 '"'"'
--disable-shared --enable-static --extra-ldflags='"'"'
-Wl,-rpath-link=/home/rob/src/android-ndk-r8/platforms/android-14/arch-arm//usr/lib -L/home/rob/src/android-ndk-r8/platforms/android-14/arch-arm//usr/lib
-nostdlib -lc -lm -ldl -llog'"'"'
--disable-everything --enable-demuxer=mov --enable-demuxer=h264
--disable-ffplay --enable-protocol=file
--enable-avformat --enable-avcodec --enable-decoder=rawvideo
--enable-decoder=mjpeg --enable-decoder=h263 --enable-decoder=mpeg4
--enable-decoder=h264 --enable-parser=h264 --disable-network --enable-zlib --disable-avfilter --disable-avdevice'
配置日志的尾部包含编译器检查错误
zmbv_test='yes'
zmbv_test_deps='zlib'
WARNING: /home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-pkg-config not found, library detection may fail.
mktemp -u XXXXXX
Yd2A0h
WARNING: Unknown C compiler /home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc, unable to select optimal CFLAGS
check_ld cc
check_cc
BEGIN /tmp/ffconf.m9Kg3cqt.c
1 int main(void){ return 0; }
END /tmp/ffconf.m9Kg3cqt.c
/home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -marm -march=armv7-a -mtune=cortex-a9 -c -o /tmp/ffconf.tO2EIBz5.o /tmp/ffconf.m9Kg3cqt.c
./configure: 640: ./configure: /home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc: not found
C compiler test failed.
build_android.sh 标准输出的尾部看起来不错
libavutil/opt.c: In function ‘av_find_opt’:
libavutil/opt.c:41:5: warning: ‘av_next_option’ is deprecated (declared at libavutil/opt.h:347) [-Wdeprecated-declarations]
CC libavutil/pixdesc.o
libavutil/opt.c: In function ‘av_opt_set_defaults’:
libavutil/opt.c:601:5: warning: ‘av_opt_set_defaults2’ is deprecated (declared at libavutil/opt.h:370) [-Wdeprecated-declarations]
CC libavutil/random_seed.o
CC libavutil/rational.o
CC libavutil/rc4.o
CC libavutil/samplefmt.o
CC libavutil/sha.o
CC libavutil/timecode.o
CC libavutil/tree.o
CC libavutil/utils.o
CC libavutil/x86/cpu.o
INSTALL libavdevice/avdevice.h
INSTALL presets/libvpx-1080p50_60.ffpreset
INSTALL presets/libvpx-1080p.ffpreset
INSTALL presets/libvpx-360p.ffpreset
INSTALL presets/libvpx-720p50_60.ffpreset
INSTALL presets/libvpx-720p.ffpreset
INSTALL presets/libx264-ipod320.ffpreset
INSTALL presets/libx264-ipod640.ffpreset
INSTALL doc/ffprobe.xsd
INSTALL libavdevice/libavdevice.pc
INSTALL libavfilter/asrc_abuffer.h
INSTALL libavfilter/avcodec.h
INSTALL libavfilter/avfilter.h
INSTALL libavfilter/avfiltergraph.h
INSTALL libavfilter/buffersink.h
INSTALL libavfilter/version.h
INSTALL libavfilter/vsrc_buffer.h
INSTALL libavfilter/libavfilter.pc
INSTALL libavformat/avformat.h
INSTALL libavformat/avio.h
INSTALL libavformat/version.h
INSTALL libavformat/libavformat.pc
INSTALL libavresample/avresample.h
INSTALL libavresample/version.h
INSTALL libavresample/libavresample.pc
INSTALL libavcodec/avcodec.h
INSTALL libavcodec/avfft.h
INSTALL libavcodec/dxva2.h
INSTALL libavcodec/vaapi.h
INSTALL libavcodec/vda.h
INSTALL libavcodec/vdpau.h
INSTALL libavcodec/version.h
INSTALL libavcodec/xvmc.h
INSTALL libavcodec/libavcodec.pc
INSTALL libswresample/libswresample.pc
INSTALL libswresample/swresample.h
INSTALL libswscale/swscale.h
INSTALL libswscale/libswscale.pc
INSTALL libavutil/adler32.h
INSTALL libavutil/aes.h
INSTALL libavutil/attributes.h
INSTALL libavutil/audio_fifo.h
INSTALL libavutil/audioconvert.h
INSTALL libavutil/avassert.h
INSTALL libavutil/avstring.h
INSTALL libavutil/avutil.h
INSTALL libavutil/base64.h
INSTALL libavutil/bprint.h
INSTALL libavutil/bswap.h
INSTALL libavutil/common.h
INSTALL libavutil/cpu.h
INSTALL libavutil/crc.h
INSTALL libavutil/error.h
INSTALL libavutil/eval.h
INSTALL libavutil/fifo.h
INSTALL libavutil/file.h
INSTALL libavutil/imgutils.h
INSTALL libavutil/intfloat.h
INSTALL libavutil/intfloat_readwrite.h
INSTALL libavutil/intreadwrite.h
INSTALL libavutil/lfg.h
INSTALL libavutil/log.h
INSTALL libavutil/lzo.h
INSTALL libavutil/mathematics.h
INSTALL libavutil/md5.h
INSTALL libavutil/mem.h
INSTALL libavutil/dict.h
INSTALL libavutil/opt.h
INSTALL libavutil/parseutils.h
INSTALL libavutil/pixdesc.h
INSTALL libavutil/pixfmt.h
INSTALL libavutil/random_seed.h
INSTALL libavutil/rational.h
INSTALL libavutil/samplefmt.h
INSTALL libavutil/sha.h
INSTALL libavutil/timecode.h
INSTALL libavutil/timestamp.h
INSTALL libavutil/avconfig.h
INSTALL libavutil/libavutil.pc
AR libavdevice/libavdevice.a
AR libavfilter/libavfilter.a
AR libavformat/libavformat.a
AR libavresample/libavresample.a
AR libavcodec/libavcodec.a
AR libswresample/libswresample.a
AR libswscale/libswscale.a
AR libavutil/libavutil.a
INSTALL libavdevice/libavdevice.a
INSTALL libavfilter/libavfilter.a
INSTALL libavresample/libavresample.a
INSTALL libswresample/libswresample.a
INSTALL libswscale/libswscale.a
INSTALL libavutil/libavutil.a
INSTALL libavformat/libavformat.a
LD ffmpeg_g
INSTALL libavcodec/libavcodec.a
CP ffmpeg
STRIP ffmpeg
INSTALL install-progs-yes
INSTALL ffmpeg