android 产品移植 android移植视频

转载

mob6454cc69d373 2024-02-27 13:56:08

文章标签 android 产品移植 android linux Android 文章分类 Android 移动开发

最近在做Android 上多媒体的开发，首先是需要在Android移植ffmpeg，结果在网上找了很长时间的文章，哎，还是各种失败，生成的库文件只有1.6k大小，

这可急坏了我，还是网上各种度狗

最后在我的系统ubuntu 10.04，Android NDK 是Android NDK r5b，成功编译出了1.9M大小的libffmpeg.so文件，最近有空还是决定把编译历程写下来，

给那些碰到同样问题的网友一个很好的参考！

结果生成的库文件悲剧的只有1.6K大小，找遍全网络，在一篇文档上说是Android NDK r4的bug，按照文档修改了build中 core的编译脚本，结果还是悲剧了！

又在网上继续的度狗，找到一篇文章说是大牛级别的，不需要修改什么源文件，脚本文件也只一个，我又是在虚拟机中重装一个ubuntu系统，接着Go

参考文档：

脚本复制出来了，按照文档一步一步操作...

经过一系列漫长的让人揪心的编译滚屏后，这段时间真的是让人心儿蹦蹦跳...最后怀着忐忑的心情查看生成的ffmpeg库文件，悲催的还是只有1.6K大小，我

瞬间想撞墙啊，有木有！

最后在一次偶尔的机会下，我看到了一篇英文网页上讲如何成功移植ffmpeg的，我抱着试试的心态，按照文档操作，果然成功！牛啊，感叹还是外国人靠谱，

你在网上查过资料就会发现，很多资料都如出一辙，C2C的精神，直接Copy的，估计没经过自己测试！

现在附上编译的脚本:

[html] view plain copy print ?

1. #!/bin/bash  
2.   
3. ######################################################  
4. # Usage:  
5. #   put this script in top of FFmpeg source tree  
6. #   ./build_android  
7. #  
8. # It generates binary for following architectures:  
9. #     ARMv6   
10. #     ARMv6+VFP   
11. #     ARMv7+VFPv3-d16 (Tegra2)   
12. #     ARMv7+Neon (Cortex-A8)  
13. #  
14. # Customizing:  
15. # 1. Feel free to change ./configure parameters for more features  
16. # 2. To adapt other ARM variants  
17. #       set $CPU and $OPTIMIZE_CFLAGS   
18. #       call build_one  
19. ######################################################  
20.   
21. NDK=/home/hu/android-ndk-r5b  
22. PLATFORM=$NDK/platforms/android-8/arch-arm/  
23. PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86  
24.   
25.   
26. function build_one  
27. {  
28. ./configure --target-os=linux
29. --prefix=$PREFIX \  
30.     --enable-cross-compile \  
31. --extra-libs="-lgcc"
32. --arch=arm
33. --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \  
34. --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \  
35. --nm=$PREBUILT/bin/arm-linux-androideabi-nm \  
36. --sysroot=$PLATFORM \  
37. --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 $OPTIMIZE_CFLAGS "
38.     --disable-shared \  
39.     --enable-static \  
40. --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -nostdlib -lc -lm -ldl -llog"
41.     --disable-everything \  
42. --enable-demuxer=mov
43. --enable-demuxer=h264
44.     --disable-ffplay \  
45. --enable-protocol=file
46.     --enable-avformat \  
47.     --enable-avcodec \  
48. --enable-decoder=rawvideo
49. --enable-decoder=mjpeg
50. --enable-decoder=h263
51. --enable-decoder=mpeg4
52. --enable-decoder=h264
53. --enable-parser=h264
54.     --disable-network \  
55.     --enable-zlib \  
56.     --disable-avfilter \  
57.     --disable-avdevice \  
58.     $ADDITIONAL_CONFIGURE_FLAG  
59.   
60.   
61. make clean  
62. make  -j4 install  
63.   
64. $PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o  
65.   
66. $PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a  
67. }  
68.   
69. #arm v6  
70. #CPU=armv6
71. #OPTIMIZE_CFLAGS="-marm -march=$CPU"
72. #PREFIX=./android/$CPU   
73. #ADDITIONAL_CONFIGURE_FLAG=  
74. #build_one  
75.   
76. #arm v7vfpv3  
77. CPU=armv7-a  
78. OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
79. PREFIX=./android/$CPU   
80. ADDITIONAL_CONFIGURE_FLAG=  
81. build_one
82.   
83. #arm v7vfp  
84. #CPU=armv7-a  
85. #OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
86. #PREFIX=./android/$CPU-vfp  
87. #ADDITIONAL_CONFIGURE_FLAG=  
88. #build_one  
89.   
90. #arm v7n  
91. #CPU=armv7-a  
92. #OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
93. #PREFIX=./android/$CPU   
94. #ADDITIONAL_CONFIGURE_FLAG=--enable-neon  
95. #build_one  
96.   
97. #arm v6+vfp  
98. #CPU=armv6
99. #OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
100. #PREFIX=./android/${CPU}_vfp   
101. #ADDITIONAL_CONFIGURE_FLAG=  
102. #build_one

#!/bin/bash

######################################################
# Usage:
#   put this script in top of FFmpeg source tree
#   ./build_android
#
# It generates binary for following architectures:
#     ARMv6 
#     ARMv6+VFP 
#     ARMv7+VFPv3-d16 (Tegra2) 
#     ARMv7+Neon (Cortex-A8)
#
# Customizing:
# 1. Feel free to change ./configure parameters for more features
# 2. To adapt other ARM variants
#       set $CPU and $OPTIMIZE_CFLAGS 
#       call build_one
######################################################

NDK=/home/hu/android-ndk-r5b
PLATFORM=$NDK/platforms/android-8/arch-arm/
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86


function build_one
{
./configure --target-os=linux \
    --prefix=$PREFIX \
    --enable-cross-compile \
    --extra-libs="-lgcc" \
    --arch=arm \
    --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
    --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
    --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
    --sysroot=$PLATFORM \
    --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 $OPTIMIZE_CFLAGS " \
    --disable-shared \
    --enable-static \
    --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/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 \
    $ADDITIONAL_CONFIGURE_FLAG


make clean
make  -j4 install

$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o

$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a
}

#arm v6
#CPU=armv6
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=./android/$CPU 
#ADDITIONAL_CONFIGURE_FLAG=
#build_one

#arm v7vfpv3
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
PREFIX=./android/$CPU 
ADDITIONAL_CONFIGURE_FLAG=
build_one

#arm v7vfp
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
#PREFIX=./android/$CPU-vfp
#ADDITIONAL_CONFIGURE_FLAG=
#build_one

#arm v7n
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
#PREFIX=./android/$CPU 
#ADDITIONAL_CONFIGURE_FLAG=--enable-neon
#build_one

#arm v6+vfp
#CPU=armv6
#OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
#PREFIX=./android/${CPU}_vfp 
#ADDITIONAL_CONFIGURE_FLAG=
#build_one

！！

本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。