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（windows） Android ffmpeg 移植 cygwin+ndk-r8e+win7

这是cygwin在运行时，写的。。

（以 http://blog.csdn.net/klep1986/article/details/7717186 为基础）

PS:android-ndk-r9b dowload path : http://dl.google.com/android/ndk/android-ndk-r9-linux-x86.tar.bz2

一.首先肯定是要安装cygwin + ndk-r8e并配置好

二.http://ffmpeg.org/download.html 下载ffmpeg源码

我下的是

FFmpeg-0.11.5

下载地址：http://ffmpeg.org/releases/ffmpeg-0.11.5.tar.gz 解压到个jni文件夹用于之后的android编译，我放在E:\myProject\MyFFmpeg\project\jni\ffmpeg里，注意：不要ffmpeg-0.11.5这个文件夹了，直接把里面的各个文件放到jni里

三.配置ffmpeg

这步耗得时间最多了。。

首先用ultraedit新建个文件复制下面的内容保存为config.sh 放到jni\ffmpeg里面然后系统增加环境变量NDK_ROOT , 我加的 D:/android-ndk-r6b

#!/bin/bash

export TMPDIR="g:/temp"
PREBUILT=${NDK_ROOT}/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows
PLATFORM=android-4
ARCH=--arch=arm
./configure \
${ARCH} \
--target-os=linux --enable-cross-compile --cross-prefix=${PREBUILT}/bin/arm-linux-androideabi- \
--extra-cflags=" -fPIC -DANDROID -std=c99 " \
--enable-version3 \
--enable-gpl \
--enable-nonfree \
--disable-stripping \
--disable-ffmpeg\
--disable-ffplay\
--disable-ffserver\
--disable-ffprobe \
--disable-encoders \
--disable-muxers \
--disable-devices \
--disable-protocols \
--enable-protocol=file \
--enable-avfilter \
--disable-network \
--disable-avdevice \
--disable-asm \
--enable-neon \
--enable-armv5te \
--sysinclude=${NDK_ROOT}/platforms/${PLATFORM}/arch-arm/usr/include \
--extra-ldflags="-Wl,-rpath-link=${NDK_ROOT}/platforms/${PLATFORM}/arch-arm/usr/lib
-L${NDK_ROOT}/platforms/${PLATFORM}/arch-arm/usr/lib -nostdlib
${NDK_ROOT}/platforms/${PLATFORM}/arch-arm/usr/lib/crtbegin_static.o
${NDK_ROOT}/platforms/${PLATFORM}/arch-arm/usr/lib/crtend_android.o -lc -lm -ldl "

cygwin进入这个目录，执行 ./config.sh

这里可能出现的问题：

1.提示各种command not found

比如line 6: $'--arch=arm\r': command not found 可以看到arm后面有个'\r' unix文件换行和win下面不一样需要用ultraedit 文件-转换-dos转unix

2. 提示

D:/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/wind

 ows/bin/arm-linux-androideabi-gcc is unable to create an executable file.

 C compiler test failed. 错误

是需要增加个tmp文件夹放配置生成的各种文件具体错误信息可以看jni下面的config.log文件

然后更改ffmpeg自带的configure文件

# set temporary file name
: ${TMPDIR:=$TEMPDIR}
: ${TMPDIR:=$TMP}
: ${TMPDIR:=tmp}改为

# set temporary file name
#: ${TMPDIR:=$TEMPDIR}
#: ${TMPDIR:=$TMP}
: ${TMPDIR:=E:/myProject/MyFFmpeg/project/jni/tmp}

这样应该能顺利编译通过了

提示 creating config.h config.mak 之类的在看下jni下面如果有这2个文件就是成功了

四.修改各种文件

1. 将刚生成的config.h中的

#define restrict restrict 
改为

#define restrict

  
  
    
    
    
    
     
     
     
     2.编辑 libavcodec、libavfilter、libavformat、libavutil、libpostproc 和 libswscale 目录中的 Makefile 文件，删除
    
    
    
    
include $(SUBDIR)../config.mak

3.编辑 libavutil/libm.h 把所有的static方法删除了

4.手动添加 libavutil/ffversion.h #define FFMPEG_VERSION "wr.ndkr9d.ffmpeg281";

五 .创建av.mk放在jni/ffmpeg下复制下面的内容到av.mk里

# LOCAL_PATH is one of libavutil, libavcodec, libavformat, or libswscale

#include $(LOCAL_PATH)/../config-$(TARGET_ARCH).mak
include $(LOCAL_PATH)/../config.mak

OBJS :=
OBJS-yes :=
MMX-OBJS-yes :=
include $(LOCAL_PATH)/Makefile

# collect objects
OBJS-$(HAVE_MMX) += $(MMX-OBJS-yes)
OBJS += $(OBJS-yes)

FFNAME := lib$(NAME)
FFLIBS := $(foreach,NAME,$(FFLIBS),lib$(NAME))

FFCFLAGS = -DHAVE_AV_CONFIG_H -Wno-sign-compare -Wno-switch -Wno-pointer-sign
FFCFLAGS += -DTARGET_CONFIG=\"config-$(TARGET_ARCH).h\"

ALL_S_FILES := $(wildcard $(LOCAL_PATH)/$(TARGET_ARCH)/*.S)
ALL_S_FILES := $(addprefix $(TARGET_ARCH)/, $(notdir $(ALL_S_FILES)))

ifneq ($(ALL_S_FILES),)
ALL_S_OBJS := $(patsubst %.S,%.o,$(ALL_S_FILES))
C_OBJS := $(filter-out $(ALL_S_OBJS),$(OBJS))
S_OBJS := $(filter $(ALL_S_OBJS),$(OBJS))
else
C_OBJS := $(OBJS)
S_OBJS :=
endif

C_FILES := $(patsubst %.o,%.c,$(C_OBJS))
S_FILES := $(patsubst %.o,%.S,$(S_OBJS))

FFFILES := $(sort $(S_FILES)) $(sort $(C_FILES))

六.创建各种mk文件

1、编辑ffmpegffmpeg-0.6.1下各个模块的Makefile文件
分别把libavutil、libavcodec、libavformat、libavfilter、libpostproct和libswscale下的Makefile文件中下面两行删除掉：
include $(SUBDIR)../subdir.mak
include $(SUBDIR)../config.mak

2、在ffmpegffmpeg-0.6.1根目录下新建一个av.mk文件

       Java代码   
       
     
 # LOCAL_PATH is one of libavutil, libavcodec, libavformat, or libswscale  
 #include $(LOCAL_PATH)/../config-$(TARGET_ARCH).mak  
 include $(LOCAL_PATH)/../config.mak  
 OBJS :=  
 OBJS-yes :=  
 MMX-OBJS-yes :=  
 include $(LOCAL_PATH)/Makefile  
 # collect objects  
 OBJS-$(HAVE_MMX) += $(MMX-OBJS-yes)  
 OBJS += $(OBJS-yes)  
 FFNAME := lib$(NAME)  
 FFLIBS := $(foreach,NAME,$(FFLIBS),lib$(NAME))  
 FFCFLAGS  = -DHAVE_AV_CONFIG_H -Wno-sign-compare -Wno-switch -Wno-pointer-sign  
 FFCFLAGS += -DTARGET_CONFIG=/"config-$(TARGET_ARCH).h/"  
 ALL_S_FILES := $(wildcard $(LOCAL_PATH)/$(TARGET_ARCH)/*.S)  
 ALL_S_FILES := $(addprefix $(TARGET_ARCH)/, $(notdir $(ALL_S_FILES)))  
 ifneq ($(ALL_S_FILES),)  
 ALL_S_OBJS := $(patsubst %.S,%.o,$(ALL_S_FILES))  
 C_OBJS := $(filter-out $(ALL_S_OBJS),$(OBJS))  
 S_OBJS := $(filter $(ALL_S_OBJS),$(OBJS))  
 else  
 C_OBJS := $(OBJS)  
 S_OBJS :=  
 endif  
   
 C_FILES := $(patsubst %.o,%.c,$(C_OBJS))  
 S_FILES := $(patsubst %.o,%.S,$(S_OBJS))  
 FFFILES := $(sort $(S_FILES)) $(sort $(C_FILES))  

3、新建Android.mk文件
在jni目录建立Android.mk文件.
在ffmpegffmpeg-0.6.1下新建Android.mk文件
在libavformat,libavcodec,libavfilter、libavutil、libpostproc和libswscale目录建立同样的文件
1)在jni文件夹新建Android.mk文件
include $(all-subdir-makefiles)

2)在ffmpeg下新建Android.mk文件

       Java代码   
       
     
 LOCAL_PATH := $(call my-dir)  
 include $(CLEAR_VARS)  
 LOCAL_WHOLE_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale libavfilter  
 LOCAL_MODULE := ffmpeg  
 include $(BUILD_SHARED_LIBRARY)  
 include $(call all-makefiles-under,$(LOCAL_PATH))  

3)在ffmpeg/libavformat下新建Android.mk

       Java代码   
       
     
 LOCAL_PATH := $(call my-dir)  
 include $(CLEAR_VARS)  
 include $(LOCAL_PATH)/../av.mk  
 LOCAL_SRC_FILES := $(FFFILES)  
 LOCAL_C_INCLUDES :=  \  
  $(LOCAL_PATH)  \  
  $(LOCAL_PATH)/..  
 LOCAL_CFLAGS += $(FFCFLAGS)  
 LOCAL_CFLAGS += -include "string.h" -Dipv6mr_interface=ipv6mr_ifindex  
 LOCAL_LDLIBS := -lz  
 LOCAL_SHARED_LIBRARIES := libavutil libavcodec  
 LOCAL_MODULE := $(FFNAME)  
 include $(BUILD_SHARED_LIBRARY)  

4)在ffmpeg/libavcodec下新建Android.mk

       Java代码   
       
     
 LOCAL_PATH := $(call my-dir)  
 include $(CLEAR_VARS)  
 include $(LOCAL_PATH)/../av.mk  
 LOCAL_SRC_FILES := $(FFFILES)  
 LOCAL_C_INCLUDES :=  \  
  $(LOCAL_PATH)  \  
  $(LOCAL_PATH)/..  
 LOCAL_CFLAGS += $(FFCFLAGS)  
 LOCAL_LDLIBS := -lz  
 LOCAL_SHARED_LIBRARIES := libavutil  
 LOCAL_MODULE := $(FFNAME)  
 include $(BUILD_SHARED_LIBRARY)  

5)在ffmpeg/libavfilter下新建Android.mk

       Java代码   
       
     
 LOCAL_PATH := $(call my-dir)  
 include $(CLEAR_VARS)  
 include $(LOCAL_PATH)/../av.mk  
 LOCAL_SRC_FILES := $(FFFILES)  
 LOCAL_C_INCLUDES :=  \  
  $(LOCAL_PATH)  \  
  $(LOCAL_PATH)/..  
 LOCAL_CFLAGS += $(FFCFLAGS)  
 LOCAL_SHARED_LIBRARIES := libavutil libswscale libavcodec  
 LOCAL_MODULE := $(FFNAME)  
 include $(BUILD_SHARED_LIBRARY)  

6)在ffmpeg/libavutil下新建Android.mk

       Java代码   
       
     
 LOCAL_PATH := $(call my-dir)  
 include $(CLEAR_VARS)  
 include $(LOCAL_PATH)/../av.mk  
 LOCAL_SRC_FILES := $(FFFILES)  
 LOCAL_C_INCLUDES :=  \  
  $(LOCAL_PATH)  \  
  $(LOCAL_PATH)/..  
 LOCAL_CFLAGS += $(FFCFLAGS)  
 LOCAL_MODULE := $(FFNAME)  
 include $(BUILD_SHARED_LIBRARY)  

7)在ffmpeg/libpostproc下新建Android.mk

       Java代码   
       
     
 LOCAL_PATH := $(call my-dir)  
 include $(CLEAR_VARS)  
 include $(LOCAL_PATH)/../av.mk  
 LOCAL_SRC_FILES := $(FFFILES)  
 LOCAL_C_INCLUDES :=  \  
  $(LOCAL_PATH)  \  
  $(LOCAL_PATH)/..  
 LOCAL_CFLAGS += $(FFCFLAGS)  
 LOCAL_SHARED_LIBRARIES :=libavutil  
 LOCAL_MODULE := $(FFNAME)  
 include $(BUILD_SHARED_LIBRARY)  

8)在ffmpeg/libswscale下的Android.mk文件

       Java代码   
       
     
 LOCAL_PATH := $(call my-dir)  
 include $(CLEAR_VARS)  
 include $(LOCAL_PATH)/../av.mk  
 LOCAL_SRC_FILES := $(FFFILES)  
 LOCAL_C_INCLUDES :=  \  
  $(LOCAL_PATH)  \  
  $(LOCAL_PATH)/..  
 LOCAL_CFLAGS += $(FFCFLAGS)  
 LOCAL_SHARED_LIBRARIES := libavutil  
 LOCAL_MODULE := $(FFNAME)  
 include $(BUILD_SHARED_LIBRARY)  

四、编译
在jni目录下运行ndk-build
如果编译成功，产生出libavcodec.so、libavfilter.so、libavformat.so、libavutil.so、 libffmpeg.so，libpostproc.so和libswscale.so。

七.准备工作都做完了，最后的胜利马上来了

cygwin cd到project目录下然后执行 ndk-build

我碰到的问题：

1.Please define the NDK_PROJECT_PATH variable to point to it 这种一般是工程路径错了注意jni文件夹还有Android.mk文件的位置仔细检查下

2.multiple definition of `ff_inverse' 重复定义了

修改libavcodec/Makefile，把下面一行删掉：

OBJS-$(!CONFIG_SMALL) += inverse.o

3.utils.c编译.o的时候也可能提示错误找不到codec_names.h 把#include "libavcodec/codec_names.h" 删了就可以了

一切顺利的话等待个10来分钟 obj\local\armeabi下会生成libavcodec.a， libavformat.a， libavutil.a， libpostproc.a， libswscale.a， libffmpeg.so 6个文件

大功告成！

特别感谢下面2篇博文的帮助也copy了很多东西，拿来主义，要避免重复造轮子嘛 O(∩_∩)O~

http://hi.baidu.com/benbearlove/item/7b4d896240611a95c4d24920

http://hi.baidu.com/gpf626487/blog/item/fcc3a9060029dea7e850cd9f.html

遇到的问题：

原本想用android ndk最新的4.8 toolchain, 可视在预配置脚本执行过程中会报错，换用4.6版本的toolchain可以顺利通过。

提示错误如下(暂时未能解决):
/home/mike/devtool/android-ndk-r9/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc

is unable to create an executable file. C compiler test failed.

我们需要修改config.h文件，将其中的

#define av_restrict restrict

修改成

#define av_restrict

修改ffmpeg代码，以便在NDK中编译通过

在libavfilter目录中的Makefile的末尾处多了 Clean 这个玩意儿将其注释掉或者删掉。

修改~/ayer/jni/ffmpeg/libavutil/libm.h文件，将其中的所有static方法都注释掉

修改ffmpeg源码目录中的libavcodev，libavfilter，libavformat，libavutil，libpostproc，libswscale中的Makefile，将Makefile中的开头：include $(SUBDIR)../config.mak都注释掉

android-ndk-r8d/build/core/build-binary.mk:41: *** target file

`clean' has both : and :: entries. Stop.

我也遇到了相同的问题，不过经过一步步排查，是因为在libavfilter目录中的Makefile的末尾处多了 Clean 这个玩意儿将其注释掉或者删掉就可以了

恢复改方法

/libavutil/libm.h:183:40: error: static declaration of 'truncf' follows non-static declaration

libm.h的static方法删除掉

/*#define av_restrict restrict*/
#define restrict

file included from jni/ffmpeg/libavcodec/aacdec.c:82:0:
jni/ffmpeg/libavcodec/../libavutil/float_dsp.h:150:50: error: expected ';', ',' or ')' before 'v1'
jni/ffmpeg/libavcodec/aacdec.c: In function 'apply_mid_side_stereo':
jni/ffmpeg/libavcodec/aacdec.c:1746:29: error: 'AVFloatDSPContext' has no member named 'butterflies_float'
make: *** [obj/local/armeabi/objs/avcodec/aacdec.o] Error 1

c、修改jni/ffmpeg/config.h下的
#define avrestrict restrict为#define restrict

这个应该改为 #define av_restrict

stdlib 的错误

/home/usr/android-ndk-r9/platforms/android-18/arch-arm/usr/include/stdlib.h:54:14: error: expected identifier or '(' before 'void'
/home/usr/android-ndk-r9/platforms/android-18/arch-arm/usr/include/stdlib.h:54:14: error: expected ')' before numeric constant

--extra-cflags="-I${NDK_ROOT}/platforms/${PLATFORM}/arch-arm/usr/include -fPIC -DANDROID -std=c99" \

添加了I，应该是stdlib的头文件没有找对导致的

jni/ffmpeg/libavutil/parseutils.c:541:15: error: storage size of 'dt' isn't known
jni/ffmpeg/libavutil/parseutils.c:634:20: error: variable 'dt2' has initializer but incomplete type
jni/ffmpeg/libavutil/parseutils.c:634:38: error: invalid type argument of unary '*' (have 'int')
jni/ffmpeg/libavutil/parseutils.c:634:54: error: invalid type argument of unary '*' (have 'int')
jni/ffmpeg/libavutil/parseutils.c:634:23: error: storage size of 'dt2' isn't known

这个问题的解决方法是：打开 libavutil/parseutils.h，把 #include 替换为 #include

undefined reference to 'inflateReset'

在libAvcodec的mk文件里做修改、

参考

http://blog.sina.com.cn/s/blog_5c4dd3330100mpdx.html

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=        \
    $(LOCAL_PATH)        \
    $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS)
LOCAL_LDLIBS := -lz
LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)

/home/wjh/fox/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: /home/wjh/fox/android-ndk-r9c/samples/player/obj/local/armeabi/libavcodec.a(log2_tab.o): multiple definition of 'ff_log2_tab'

/home/wjh/fox/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/wjh/fox/android-ndk-r9c/samples/player/obj/local/armeabi/libavformat.a(log2_tab.o): previous definition here

/home/wjh/fox/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: /home/wjh/fox/android-ndk-r9c/samples/player/obj/local/armeabi/libavutil.a(log2_tab.o): multiple definition of 'ff_log2_tab'

/home/wjh/fox/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/wjh/fox/android-ndk-r9c/samples/player/obj/local/armeabi/libavformat.a(log2_tab.o): previous definition here

去掉libavforma里Android.mk里的zlib

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=        \
    $(LOCAL_PATH)        \
    $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS)
LOCAL_CFLAGS += -include "string.h" -Dipv6mr_interface=ipv6mr_ifindex
#LOCAL_LDLIBS := -lz
#LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)

libavformat/libavformat.a(log2_tab.o):(.rodata+0x0): multiple definition of `ff_log2_tab'
libavcodec/libavcodec.a(log2_tab.o):(.rodata+0x0): first defined here
libavutil/libavutil.a(log2_tab.o):(.rodata+0x0): multiple definition of `ff_log2_tab'
libavcodec/libavcodec.a(log2_tab.o):(.rodata+0x0): first defined here
移植ffmpeg的时候如果遇到这样的情况，在两个文件的Makefile中删掉一个log2_tab.o文件就可以了

打开libavformat的Makefile文件

lfg.o                                                            \
       lls1.o                                                           \
       lls2.o                                                           \
       log.o                                                            \
#      log2_tab.o                                                       \
       mathematics.o                                                    \
       md5.o                                                            \

mem.o \ \

删除文件，如果是多行，就不要用注释了，直接删除掉

修改libavcodec的Makefile

OBJS-$(CONFIG_RDFT)                    += rdft.o $(RDFT-OBJS-yes)
OBJS-$(CONFIG_SHARED)                  += log2_tab.o
OBJS-$(CONFIG_SINEWIN)                 += sinewin.o

------------------------------------------

-------------------------------------------

遇到的问题：

问题1：

｛

$ ./android_config.sh

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-gccis unable to create an executable file.

C compiler testfailed.

｝

尝试

export TMPDIR="d:/temp"

｛

$ /cygdrive/d/ffmpeg-2.8.1/android_config.sh

/cygdrive/d/ffmpeg-2.8.1/android_config.sh:行3:$'\r':未找到命令

.nable to createtemporary file in d:/temp

｝

解决：

这个问题是因为cygwin的路径起点与交叉编译工具链的路径起点不一致，需要在configure进行之前将configure内用到的TMPDIR变量设置为cygwin中某个文件夹在windows中的路径。

即：exportTMPDIR=D:/cygwin/tmp或者其它路径。

export TMPDIR=C:/cygwin/temp

｛

WIN@WIN70509/cygdrive/d/ffmpeg-2.8.1

$ ./android_config.sh

D:/ffmpeg-2.8.1/configure:line 5743: [: =: unary operator expected

install prefix /usr/local

source path .

C compiler D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-gcc

C library bionic

host C compiler gcc

host C library

ARCH arm (armv5te)

big-endian no

runtime cpudetection yes

ARMv5TE enabled yes

ARMv6 enabled yes

ARMv6T2 enabled yes

VFP enabled yes

NEON enabled yes

THUMB enabled no

debug symbols no

strip symbols no

optimize forsize yes

optimizations yes

static no

shared yes

postprocessingsupport yes

new filtersupport yes

network support yes

threadingsupport no

safe bitstreamreader yes

SDL support no

opencl enabled no

texi2htmlenabled no

perl enabled no

pod2man enabled no

makeinfo enabled no

makeinfo supportsHTML no

Enabled programs:

ffmpeg ffprobe

External libraries:

zlib

Enabled decoders:

aac ayuv frwu

aac_fixed bethsoftvid g2m

aac_latm bfi g723_1

aasc bink g729

ac3 binkaudio_dct gif

ac3_fixed binkaudio_rdft gsm

adpcm_4xm bintext gsm_ms

adpcm_adx bmp h261

adpcm_afc bmv_audio h263

adpcm_ct bmv_video h263i

adpcm_dtk brender_pix h263p

adpcm_ea c93 h264

adpcm_ea_maxis_xa cavs hap

adpcm_ea_r1 ccaption hevc

adpcm_ea_r2 cdgraphics hnm4_video

adpcm_ea_r3 cdxl hq_hqa

adpcm_ea_xas cinepak hqx

adpcm_g722 cljr huffyuv

adpcm_g726 cllc iac

adpcm_g726le comfortnoise idcin

adpcm_ima_amv cook idf

adpcm_ima_apc cpia iff_byterun1

adpcm_ima_dk3 cscd iff_ilbm

adpcm_ima_dk4 cyuv imc

adpcm_ima_ea_eacs dca indeo2

adpcm_ima_ea_sead dds indeo3

adpcm_ima_iss dfa indeo4

adpcm_ima_oki dirac indeo5

adpcm_ima_qt dnxhd interplay_dpcm

adpcm_ima_rad dpx interplay_video

adpcm_ima_smjpeg dsd_lsbf jacosub

adpcm_ima_wav dsd_lsbf_planar jpeg2000

adpcm_ima_ws dsd_msbf jpegls

adpcm_ms dsd_msbf_planar jv

adpcm_sbpro_2 dsicinaudio kgv1

adpcm_sbpro_3 dsicinvideo kmvc

adpcm_sbpro_4 dss_sp lagarith

adpcm_swf dvbsub loco

adpcm_thp dvdsub mace3

adpcm_thp_le dvvideo mace6

adpcm_vima dxa mdec

adpcm_xa dxtory metasound

adpcm_yamaha eac3 microdvd

aic eacmv mimic

alac eamad mjpeg

alias_pix eatgq mjpegb

als eatgv mlp

amrnb eatqi mmvideo

amrwb eightbps motionpixels

amv eightsvx_exp movtext

anm eightsvx_fib mp1

ansi escape124 mp1float

ape escape130 mp2

apng evrc mp2float

ass exr mp3

asv1 ffv1 mp3adu

asv2 ffvhuff mp3adufloat

atrac1 ffwavesynth mp3float

atrac3 fic mp3on4

atrac3p flac mp3on4float

aura flashsv mpc7

aura2 flashsv2 mpc8

avrn flic mpeg1video

avrp flv mpeg2video

avs fourxm mpeg4

avui fraps mpegvideo

mpl2 prores_lgpl tscc2

msa1 ptx tta

msmpeg4v1 qcelp twinvq

msmpeg4v2 qdm2 txd

msmpeg4v3 qdraw ulti

msrle qpeg utvideo

mss1 qtrle v210

mss2 r10k v210x

msvideo1 r210 v308

mszh ra_144 v408

mts2 ra_288 v410

mvc1 ralf vb

mvc2 rawvideo vble

mxpeg realtext vc1

nellymoser rl2 vc1image

nuv roq vcr1

on2avc roq_dpcm vima

opus rpza vmdaudio

paf_audio rv10 vmdvideo

paf_video rv20 vmnc

pam rv30 vorbis

pbm rv40 vp3

pcm_alaw s302m vp5

pcm_bluray sami vp6

pcm_dvd sanm vp6a

pcm_f32be sgi vp6f

pcm_f32le sgirle vp7

pcm_f64be shorten vp8

pcm_f64le sipr vp9

pcm_lxf smackaud vplayer

pcm_mulaw smacker vqa

pcm_s16be smc wavpack

pcm_s16be_planar smvjpeg webp

pcm_s16le snow webvtt

pcm_s16le_planar sol_dpcm wmalossless

pcm_s24be sonic wmapro

pcm_s24daud sp5x wmav1

pcm_s24le srt wmav2

pcm_s24le_planar ssa wmavoice

pcm_s32be stl wmv1

pcm_s32le subrip wmv2

pcm_s32le_planar subviewer wmv3

pcm_s8 subviewer1 wmv3image

pcm_s8_planar sunrast wnv1

pcm_u16be svq1 ws_snd1

pcm_u16le svq3 xan_dpcm

pcm_u24be tak xan_wc3

pcm_u24le targa xan_wc4

pcm_u32be targa_y216 xbin

pcm_u32le tdsc xbm

pcm_u8 text xface

pcm_zork theora xl

pcx thp xsub

pgm tiertexseqvideo xwd

pgmyuv tiff y41p

pgssub tmv yop

pictor truehd yuv4

pjs truemotion1 zero12v

png truemotion2 zerocodec

ppm truespeech zlib

prores tscc zmbv

Enabled encoders:

a64multi jpeg2000 ppm

a64multi5 jpegls prores

aac ljpeg prores_aw

ac3 mjpeg prores_ks

ac3_fixed movtext qtrle

adpcm_adx mp2 r10k

adpcm_g722 mp2fixed r210

adpcm_g726 mpeg1video ra_144

adpcm_ima_qt mpeg2video rawvideo

adpcm_ima_wav mpeg4 roq

adpcm_ms msmpeg4v2 roq_dpcm

adpcm_swf msmpeg4v3 rv10

adpcm_yamaha msvideo1 rv20

alac nellymoser s302m

alias_pix pam sgi

amv pbm snow

apng pcm_alaw sonic

ass pcm_f32be sonic_ls

asv1 pcm_f32le srt

asv2 pcm_f64be ssa

avrp pcm_f64le subrip

avui pcm_mulaw sunrast

ayuv pcm_s16be svq1

bmp pcm_s16be_planar targa

cinepak pcm_s16le tiff

cljr pcm_s16le_planar tta

comfortnoise pcm_s24be utvideo

dca pcm_s24daud v210

dnxhd pcm_s24le v308

dpx pcm_s24le_planar v408

dvbsub pcm_s32be v410

dvdsub pcm_s32le vorbis

dvvideo pcm_s32le_planar wavpack

eac3 pcm_s8 webvtt

ffv1 pcm_s8_planar wmav1

ffvhuff pcm_u16be wmav2

flac pcm_u16le wmv1

flashsv pcm_u24be wmv2

flashsv2 pcm_u24le xbm

flv pcm_u32be xface

g723_1 pcm_u32le xsub

gif pcm_u8 xwd

h261 pcx y41p

h263 pgm yuv4

h263p pgmyuv zlib

huffyuv png zmbv

Enabled hwaccels:

Enabled parsers:

aac dvdsub mpegvideo

aac_latm flac opus

ac3 g729 png

adx gsm pnm

bmp h261 rv30

cavsvideo h263 rv40

cook h264 tak

dca hevc vc1

dirac mjpeg vorbis

dnxhd mlp vp3

dpx mpeg4video vp8

dvbsub mpegaudio vp9

dvd_nav

Enabled demuxers:

aa g723_1 mpjpeg

aac g729 mpl2

ac3 gif mpsub

act gsm msnwc_tcp

adf gxf mtv

adp h261 mv

adx h263 mvi

aea h264 mxf

afc hevc mxg

aiff hls nc

amr hnm nistsphere

anm ico nsv

apc idcin nut

ape idf nuv

apng iff ogg

aqtitle ilbc oma

asf image2 paf

asf_o image2_alias_pix pcm_alaw

ass image2_brender_pix pcm_f32be

ast image2pipe pcm_f32le

au image_bmp_pipe pcm_f64be

avi image_dds_pipe pcm_f64le

avr image_dpx_pipe pcm_mulaw

avs image_exr_pipe pcm_s16be

bethsoftvid image_j2k_pipe pcm_s16le

bfi image_jpeg_pipe pcm_s24be

bfstm image_jpegls_pipe pcm_s24le

bink image_pictor_pipe pcm_s32be

bintext image_png_pipe pcm_s32le

bit image_qdraw_pipe pcm_s8

bmv image_sgi_pipe pcm_u16be

boa image_sunrast_pipe pcm_u16le

brstm image_tiff_pipe pcm_u24be

c93 image_webp_pipe pcm_u24le

caf ingenient pcm_u32be

cavsvideo ipmovie pcm_u32le

cdg ircam pcm_u8

cdxl iss pjs

cine iv8 pmp

concat ivf pva

data jacosub pvf

daud jv qcp

dfa latm r3d

dirac live_flv rawvideo

dnxhd lmlm4 realtext

dsf loas redspark

dsicin lrc rl2

dss lvf rm

dts lxf roq

dtshd m4v rpl

dv matroska rsd

dvbsub mgsts rso

dxa microdvd rtp

ea mjpeg rtsp

ea_cdata mlp sami

eac3 mlv sap

epaf mm sbg

ffm mmf sdp

ffmetadata mov sdr2

filmstrip mp3 segafilm

flac mpc shorten

flic mpc8 siff

flv mpegps sln

fourxm mpegts smacker

frm mpegtsraw smjpeg

g722 mpegvideo smush

sol tmv wav

sox truehd wc3

spdif tta webm_dash_manifest

srt tty webvtt

stl txd wsaud

str vc1 wsvqa

subviewer vc1t wtv

subviewer1 vivo wv

sup vmd xa

swf vobsub xbin

tak voc xmv

tedcaptions vplayer xwma

thp vqf yop

tiertexseq w64 yuv4mpegpipe

Enabled muxers:

a64 ipod pcm_s32be

ac3 ircam pcm_s32le

adts ismv pcm_s8

adx ivf pcm_u16be

aiff jacosub pcm_u16le

amr latm pcm_u24be

apng lrc pcm_u24le

asf m4v pcm_u32be

asf_stream matroska pcm_u32le

ass matroska_audio pcm_u8

ast md5 psp

au microdvd rawvideo

avi mjpeg rm

avm2 mkvtimestamp_v2 roq

bit mlp rso

caf mmf rtp

cavsvideo mov rtp_mpegts

crc mp2 rtsp

dash mp3 sap

data mp4 segment

daud mpeg1system singlejpeg

dirac mpeg1vcd smjpeg

dnxhd mpeg1video smoothstreaming

dts mpeg2dvd sox

dv mpeg2svcd spdif

eac3 mpeg2video spx

f4v mpeg2vob srt

ffm mpegts stream_segment

ffmetadata mpjpeg swf

filmstrip mxf tee

flac mxf_d10 tg2

flv mxf_opatom tgp

framecrc null truehd

framemd5 nut uncodedframecrc

g722 oga vc1

g723_1 ogg vc1t

gif oma voc

gxf opus w64

h261 pcm_alaw wav

h263 pcm_f32be webm

h264 pcm_f32le webm_chunk

hds pcm_f64be webm_dash_manifest

hevc pcm_f64le webp

hls pcm_mulaw webvtt

ico pcm_s16be wtv

ilbc pcm_s16le wv

image2 pcm_s24be yuv4mpegpipe

image2pipe pcm_s24le

Enabled protocols:

cache http rtmpt

concat httpproxy rtp

crypto icecast srtp

data md5 subfile

ffrtmphttp mmsh tcp

file mmst udp

ftp pipe udplite

gopher rtmp unix

hls

Enabled filters:

acrossfade curves mptestsrc

adelay dcshift negate

adrawgraph dctdnoiz noformat

aecho deband noise

aeval decimate null

aevalsrc deflate nullsink

afade dejudder nullsrc

aformat delogo overlay

ainterleave deshake owdenoise

allpass detelecine pad

allrgb dilation palettegen

allyuv drawbox paletteuse

alphaextract drawgraph pan

alphamerge drawgrid perms

amerge earwax perspective

amix ebur128 phase

amovie edgedetect pixdesctest

anull elbg pp

anullsink eq pp7

anullsrc equalizer psnr

apad erosion pullup

aperms extractplanes qp

aphasemeter fade random

aphaser fftfilt removegrain

aresample field removelogo

areverse fieldmatch repeatfields

aselect fieldorder replaygain

asendcmd find_rect reverse

asetnsamples flanger rgbtestsrc

asetpts format rotate

asetrate fps sab

asettb framepack scale

ashowinfo framerate scale2ref

asplit framestep select

astats fspp sendcmd

astreamsync geq separatefields

atadenoise gradfun setdar

atempo haldclut setfield

atrim haldclutsrc setpts

avectorscope hflip setsar

bandpass highpass settb

bandreject histeq showcqt

bass histogram showfreqs

bbox hqdn3d showinfo

biquad hqx showpalette

blackdetect hstack showspectrum

blackframe hue showvolume

blend idet showwaves

boxblur il showwavespic

cellauto inflate shuffleplanes

channelmap interlace sidechaincompress

channelsplit interleave signalstats

chorus join silencedetect

codecview kerndeint silenceremove

color lenscorrection sine

colorbalance life smartblur

colorchannelmixer lowpass smptebars

colorkey lut smptehdbars

colorlevels lut3d split

colormatrix lutrgb spp

compand lutyuv ssim

concat mandelbrot stereo3d

copy mcdeint super2xsai

cover_rect mergeplanes swapuv

crop movie tblend

cropdetect mpdecimate telecine

testsrc unsharp vstack

thumbnail uspp w3fdif

tile vectorscope waveform

tinterlace vflip xbr

transpose vignette yadif

treble volume zoompan

trim volumedetect

Enabled bsfs:

aac_adtstoasc imx_dump_header mpeg4_unpack_bframes

chomp mjpeg2jpeg noise

dump_extradata mjpega_dump_header remove_extradata

h264_mp4toannexb mov2textsub text2movsub

hevc_mp4toannexb mp3_header_decompress

Enabled indevs:

dv1394 lavfi v4l2

fbdev

Enabled outdevs:

fbdev v4l2

License: nonfree andunredistributable

Creating config.mak,config.h, and doc/config.texi...

D:/ffmpeg-2.8.1/configure:line 1316: cmp: command not found

WARNING:D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-pkg-confignot found, library detection may fail.

｝

问题2：ndk编译时，遇到 make:Nothing to be done for `all'.

通过cmd来尝试

｛

C:\Users\WIN>D:\android-ndk-r8e\ndk-build.cmdNDK_PROJECT_PATH=E:\research_works

pace\FFmpeg NDK_APPLICATION_MK=E:\research_workspace\FFmpeg\jni\application.mk

Android NDK: Your APP_BUILD_SCRIPT pointsto an unknown file: Android.mk

D:/android-ndk-r8e/build/core/add-application.mk:165:*** Android NDK: Aborting.

.. . Stop.

｝

解决android.mk 小写不行要大写 Android.mk

问题3：*** Android NDK: Missing LOCAL_MODULE beforeincluding BUILD_STATIC_LIBRARY in jni/ffmpeg/libavcodec/Android.mk

修改av.mk，在前面加上

｛

#include$(LOCAL_PATH)/../config-$(TARGET_ARCH).mak

include$(LOCAL_PATH)/../config.mak

OBJS :=

OBJS-yes :=

MMX-OBJS-yes :=

include$(LOCAL_PATH)/Makefile

# collect objects

OBJS-$(HAVE_MMX) +=$(MMX-OBJS-yes)

OBJS += $(OBJS-yes)

｝

问题4：*** target file `clean' has both : and ::entries. Stop.

在libavfilter目录中的Makefile的末尾处多了 Clean 这个玩意儿将其注释掉或者删掉就可以了

问题5：｛

"Compile thumb :avformat <= 4xm.c

In file included fromjni/ffmpeg/libavformat/../libavutil/common.h:39:0,

fromjni/ffmpeg/libavformat/../libavutil/avutil.h:288,

fromjni/ffmpeg/libavformat/../libavutil/samplefmt.h:24,

fromjni/ffmpeg/libavformat/../libavcodec/avcodec.h:31,

fromjni/ffmpeg/libavformat/avformat.h:306,

fromjni/ffmpeg/libavformat/4xm.c:32:

D:/android-ndk-r8e/platforms/android-14/arch-arm/usr/include/stdlib.h:54:14:error: expected identifier or '(' before 'void'

D:/android-ndk-r8e/platforms/android-14/arch-arm/usr/include/stdlib.h:54:14:error: expected ')' before numeric constant

make: ***[obj/local/armeabi/objs/avformat/4xm.o] Error 1

｝

备注：

由于之前android_config.sh的时候指定了android-9，这里Application.mk也要指定APP_PLATFORM := android-9(注意Application.mk头字母要大写)

非正常解决方法：

自做主张把stdlib.h 中的 extern char *getenv(const char*);改成extern char*_getenv(const char *);

变量名加个下划线，编译完再改回来。

正常解决方法：

将config.h里的#define getenv(x) NULL注释掉

问题6：

{

jni/ffmpeg/libavformat/../libavutil/time_internal.h:26:26:error: static declaration of 'gmtime_r' follows non-static declaration

D:/android-ndk-r8e/platforms/android-9/arch-arm/usr/include/time.h:77:20:note: previous declaration of 'gmtime_r' was here

jni/ffmpeg/libavformat/../libavutil/time_internal.h:37:26:error: static declaration of 'localtime_r' follows non-static declaration

D:/android-ndk-r8e/platforms/android-9/arch-arm/usr/include/time.h:74:20:note: previous declaration of 'localtime_r' was here

}

可以与上面非正常解决方法同样处理

解决：

将config.h里的#define HAVE_GMTIME_R 0改为#define HAVE_GMTIME_R 1 //搜了一下，只有time_internal.h这里用到了HAVE_GMTIME_R

还有config.h里的#define HAVE_LOCALTIME_R 0改为#define HAVE_LOCALTIME_R 1 //搜了一下，只有time_internal.HAVE_LOCALTIME_R

问题7：

｛

In file included fromjni/ffmpeg/libavformat/../libavcodec/dca.h:30:0,

fromjni/ffmpeg/libavformat/dtsdec.c:23:

jni/ffmpeg/libavformat/../libavutil/float_dsp.h:148:50:error: expected ';', ',' or ')' before 'v1'

make: ***[obj/local/armeabi/objs/avformat/dtsdec.o] Error 1

｝

jni/ffmpeg/libavformat/../libavutil/float_dsp.h:148:50:error: expected ';', ',' or ')' before 'v1'

解决：

c、修改jni/ffmpeg/config.h下的

#define avrestrict restrict为#define restrict

这个应该改为 #define av_restrict

问题8：

｛

"Compile thumb :avcodec <= aacdec_fixed.c

C:\Temp\cczAntBF.s:Assembler messages:

C:\Temp\cczAntBF.s:6264:Error: instruction not supported in Thumb16 mode -- `adds ip,r2,r1,lsr#31'

C:\Temp\cczAntBF.s:6265:Error: selected processor does not support Thumb mode `itet ne'

C:\Temp\cczAntBF.s:6266:Error: Thumb does not support conditional execution

C:\Temp\cczAntBF.s:6267:Error: Thumb does not support conditional execution

C:\Temp\cczAntBF.s:6268:Error: Thumb does not support conditional execution

C:\Temp\cczAntBF.s:6307:Error: instruction not supported in Thumb16 mode -- `adds ip,r2,r1,lsr#31'

C:\Temp\cczAntBF.s:6308:Error: selected processor does not support Thumb mode `itet ne'

C:\Temp\cczAntBF.s:6309:Error: Thumb does not support conditional execution

C:\Temp\cczAntBF.s:6310:Error: Thumb does not support conditional execution

C:\Temp\cczAntBF.s:6311:Error: Thumb does not support conditional execution

C:\Temp\cczAntBF.s:13752:Error: selected processor does not support Thumb mode `umull r1,r0,r3,r2'

make: ***[obj/local/armeabi/objs/avcodec/aacdec_fixed.o] Error 1

｝

解决：

在Application.mk上加上

APP_ABI := armeabi-v7a

问题9：

｛

"Compile thumb :avcodec <= cinepakenc.c

jni/ffmpeg/libavcodec/cinepakenc.c:In function 'rd_strip':

jni/ffmpeg/libavcodec/cinepakenc.c:966:13:error: 'for' loop initial declarations are only allowed in C99 mode

jni/ffmpeg/libavcodec/cinepakenc.c:966:13:note: use option -std=c99 or -std=gnu99 to compile your code

make: ***[obj/local/armeabi-v7a/objs/avcodec/cinepakenc.o] Error 1

｝

｛

jni/ffmpeg/libavcodec/movtextdec.c:In function 'mov_text_decode_frame':

jni/ffmpeg/libavcodec/movtextdec.c:492:13:error: 'for' loop initial declarations are only allowed in C99 mode

jni/ffmpeg/libavcodec/movtextdec.c:492:13:note: use option -std=c99 or -std=gnu99 to compile your code

make: ***[obj/local/armeabi-v7a/objs/avcodec/movtextdec.o] Error 1

｝

解决：将initial放到for之外

问题10：

｛

"Compile thumb :avutil <= parseutils.c

In file included fromjni/ffmpeg/libavutil/parseutils.c:33:0:

jni/ffmpeg/libavutil/parseutils.h:186:64:warning: 'struct tm' declared inside parameter list [enabled by default]

jni/ffmpeg/libavutil/parseutils.h:186:64:warning: its scope is only this definition or declaration, which is probablynot what you want [enabled by default]

jni/ffmpeg/libavutil/parseutils.h:191:25:warning: 'struct tm' declared inside parameter list [enabled by default]

jni/ffmpeg/libavutil/parseutils.c:468:64:warning: 'struct tm' declared inside parameter list [enabled by default]

jni/ffmpeg/libavutil/parseutils.c:468:7:error: conflicting types for 'av_small_strptime'

jni/ffmpeg/libavutil/parseutils.h:186:7:note: previous declaration of 'av_small_strptime' was here

jni/ffmpeg/libavutil/parseutils.c:In function 'av_small_strptime':

jni/ffmpeg/libavutil/parseutils.c:490:15:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:496:15:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:502:15:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:508:15:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:514:15:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:520:15:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:At top level:

jni/ffmpeg/libavutil/parseutils.c:539:25:warning: 'struct tm' declared inside parameter list [enabled by default]

jni/ffmpeg/libavutil/parseutils.c:539:8:error: conflicting types for 'av_timegm'

jni/ffmpeg/libavutil/parseutils.h:191:8:note: previous declaration of 'av_timegm' was here

jni/ffmpeg/libavutil/parseutils.c:In function 'av_timegm':

jni/ffmpeg/libavutil/parseutils.c:543:15:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:543:39:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:543:59:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:553:19:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:553:38:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:553:51:error: dereferencing pointer to incomplete type

jni/ffmpeg/libavutil/parseutils.c:In function 'av_parse_time':

jni/ffmpeg/libavutil/parseutils.c:563:12:error: variable 'dt' has initializer but incomplete type

jni/ffmpeg/libavutil/parseutils.c:563:12:warning: excess elements in struct initializer [enabled by default]

jni/ffmpeg/libavutil/parseutils.c:563:12:warning: (near initialization for 'dt') [enabled by default]

jni/ffmpeg/libavutil/parseutils.c:563:15:error: storage size of 'dt' isn't known

jni/ffmpeg/libavutil/parseutils.c:563:27:error: storage size of 'tmbuf' isn't known

jni/ffmpeg/libavutil/parseutils.c:658:20:error: variable 'dt2' has initializer but incomplete type

jni/ffmpeg/libavutil/parseutils.c:658:23:error: storage size of 'dt2' isn't known

make: ***[obj/local/armeabi-v7a/objs/avutil/parseutils.o] Error 1

｝

头文件冲突

解决：

把ffmpeg/libavutil/time.h更名为avtime.h,

同时修改下面文件中的引用libavutil/time.h为libavutil/avtime.h

ffmpeg/libavformat/avformat.h:211

ffmpeg/libavformat/avio.c:25

ffmpeg/libavformat/hls.c:33

ffmpeg/libavformat/hlsproto.c:29

ffmpeg/libavformat/mux.c:39:30

ffmpeg/libavformat/utils.c:40

ffmpeg/libavutil/time.c:36

搜索libavutil/time.h，把它们全部改为libavutil/avtime.h

libavutil/avtime.h 里添加 #include

问题11：编译出来ffmpeg.so太小

解决：将Android.mk里的LOCAL_STATIC_LIBRARIES替换为LOCAL_WHOLE_STATIC_LIBRARIES

问题12：

｛

SharedLibrary : libffmpeg.so

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe:error: ./obj/local/armeabi-v7a/libavcodec.a(golomb.o): multiple definition of'ff_interleaved_dirac_golomb_vlc_code'

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe:./obj/local/armeabi-v7a/libavformat.a(golomb_tab.o): previous definition here

此处忽略许多…

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe:./obj/local/armeabi-v7a/libavcodec.a(vp8dsp.o): in functionff_vp78dsp_init:jni/ffmpeg/libavcodec/vp8dsp.c:675: error: undefined referenceto 'ff_vp78dsp_init_arm'

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe:./obj/local/armeabi-v7a/libavcodec.a(vp8dsp.o): in functionff_vp8dsp_init:jni/ffmpeg/libavcodec/vp8dsp.c:735: error: undefined referenceto 'ff_vp8dsp_init_arm'

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe:./obj/local/armeabi-v7a/libavcodec.a(zmbvenc.o): in functionencode_frame:jni/ffmpeg/libavcodec/zmbvenc.c:219: error: undefined reference to'deflateReset'

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe:./obj/local/armeabi-v7a/libavutil.a(cpu.o): in function av_get_cpu_flags:jni/ffmpeg/libavutil/cpu.c:84:error: undefined reference to 'ff_get_cpu_flags_arm'

D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe:./obj/local/armeabi-v7a/libavutil.a(float_dsp.o): in functionavpriv_float_dsp_init:jni/ffmpeg/libavutil/float_dsp.c:134: error: undefinedreference to 'ff_float_dsp_init_arm'

collect2: ld returned1 exit status

make: ***[obj/local/armeabi-v7a/libffmpeg.so] Error 1

｝

解决：

子问题1、libavcodec/log2_tab.o: multiple definition of'ff_log2_tab'解决办法

{

新增文件libavutil/log2_tab.h, 其内容如下

#ifndef AV_LOG2TAB_H

#define AV_LOG2TAB_H

#include

extern const uint8_t ff_log2_tab[256];

#endif

将所有报上述类似错误的，做如下修改

如：修改 libavcodec/log2_tab.c,将log2_tab.c改为log2_tab.h

// #include"libavutil/log2_tab.c"

#include "libavutil/log2_tab.h"

}

子问题2、error: libavformat/golomb_tab.o: multipledefinition of 'ff_interleaved_dirac_golomb_vlc_code'解决方法

｛

修改libavformat/golomb_tab.c, 如下：

// #include "libavcodec/golomb.c"

#include "libavcodec/golomb.h"

｝

子问题3、obj/local/armeabi-v7a/libavutil.a(reverse.o):multiple definition of 'ff_reverse'

/obj/local/armeabi-v7a/libavcodec.a(reverse.o):previous definition here 解决方法

｛

新增文件libavutil/reverse.h, 其内容如下

#ifndef AV_REVERSE_WR_H

#define AV_REVERSE_WR_H

#include

extern const uint8_t ff_reverse[256];

#endif //AV_REVERSE_WR_H

将所有报上述类似错误的，做如下修改

如：修改libavutil/reverse.c, reverse.reverse.h

// #include "libavutil/reverse.c"

#include "libavutil/reverse.h"

｝

子问题4、error: undefined reference to 'inflateEnd'

｛缺少zlib

在Android.mk上加上

LOCAL_LDLIBS := \

-llog \

-lgcc \

-lz

｝

子问题5、error: undefined reference to'ff_ac3dsp_init_arm'

｛

解决方法：

｛

/libffmpeg/libavcodec/arm/目录下找 Makefile和ac3dsp_init_arm.c 定义都在这

将av.mk单独拷一份到/libffmpeg/libavcodec下，libavcodec的Android.mk里指向这个av.mk,在里面加上include$(LOCAL_PATH)/arm/Makefile

｛

衍生问题：

｛

StaticLibrary :libavcodec.a

process_begin:CreateProcess(D:\android-ndk-r8e\toolchains\arm-linux-androideabi-4.6\prebuilt\windows\bin\arm-linux-androideabi-ar.exe,D:/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-ar

此处忽略许多…

./obj/local/armeabi-v7a/objs/avcodec/xwdenc.o./obj/local/armeabi-v7a/objs/avcodec/xxan.o./obj/local/armeabi-v7a/objs/avcodec/y41pdec.o./obj/local/armeabi-v7a/objs/avcodec/y41penc.o./obj/local/armeabi-v7a/objs/avcodec/yop.o./obj/local/armeabi-v7a/objs/avcodec/yuv4dec.o./obj/local/armeabi-v7a/objs/avcodec/yuv4enc.o ./obj/local/armeabi-v7a/objs/avcodec/zerocodec.o./obj/local/armeabi-v7a/objs/avcodec/zmbv.o./obj/local/armeabi-v7a/objs/avcodec/zmbvenc.o, ...) failed.

make (e=87): 参数错误。

｝

原因是.MK文件中包含的文件太多了，而windows对于函数参数个数有限制

在Android.mk文件中添加：LOCAL_SHORT_COMMANDS := true

在Application.mk文件中添加：APP_SHORT_COMMANDS := true

http://stackoverflow.com/questions/12598933/ndk-build-createprocess-make-e-87-the-parameter-is-incorrect

问题：有更多的连接问题

未解决break

｝

换个解决方法：将undefined reference的全部加上WR_IGNORE忽略，在config.h上加上#define WR_IGNORE 0

｝

子问题6、error: undefined reference to 'swr_close'

｛

缺少libswresample

android.mk里加上 libswresample,libswresample用libavcodec的Android.mk

{

衍生问题：audioconvert.c:158: error:undefined reference to 'swri_audio_convert_init_arm'

解决：加上WR_IGNORE忽略

}

｝

终于成功了，下一步试试调用看看能不能用

可以~