宜昌有哪些化妆学校:终于在android下面完成了ffmpeg最新版的编译，弱弱的记录下

终于在android下面完成了ffmpeg最新版的编译

--lihn1987(转载请注明作者)

    其实网络上关于android编译ffmpeg的文章已经相当多了，我也尝试过很多，但是照着他们的做咋老是编不出东西呢？不是config出错就是make出错。也许是我的模仿能力太差了。。。。

    于是我浏览了下网上各位达人的方法，发现基本大同小异，都是参考的一个开源项目 

    由于我移植搞不出来，所以无奈也去参考这个项目，在此，我对这个项目的负责人表示由衷的感谢，thk U！！！！

    各位博友如果按照我的说法搞不定的话，也可以去参考下这个项目最初的做法哈。如果实在搞不定，可以加我的百度hi），我可以提供修改好的代码，直接ndk-build即可,毕竟这个也不是我第一个钻研出来的，和大家分享才是硬道理。

    以下是正文

ffmpeg目录下增加Android.mk 和av.mk config.sh三个文件

>>>>>Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_WHOLE_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale

LOCAL_MODULE := ffmpeg

include $(BUILD_SHARED_LIBRARY)

include $(call all-makefiles-under,$(LOCAL_PATH))

>>>>>av.mk

# 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))

>>>>>>>>>config.sh

#!/bin/sh

PREBUILT=/root/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86

PLATFORM=/root/android-ndk-r5/platforms/android-4/arch-arm

./configure --target-os=linux \

--arch=armv41 \

--enable-cross-compile \

--cc=$PREBUILT/bin/arm-eabi-gcc \

--cross-prefix=$PREBUILT/bin/arm-eabi- \

--nm=$PREBUILT/bin/arm-eabi-nm \

--extra-cflags="-fPIC -DANDROID" \

--enable-static \

--disable-shared \

--disable-asm \

--disable-yasm \

--prefix=/home/ffmpeg-android-bin \

--extra-ldflags="-Wl,-T,$PREBUILT/arm-eabi/lib/ldscripts/armelf.x -Wl,\

-rpath-link=$PLATFORM/usr/lib \

-L$PLATFORM/usr/lib -nostdlib \

$PREBUILT/lib/gcc/arm-eabi/4.4.0/crtbegin.o \

$PREBUILT/lib/gcc/arm-eabi/4.4.0/crtend.o -lc -lm -ldl"

在libavcodec中添加Andorid.mk文件

>>>>>>>>>>>>>>>>Android.mk

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)

在libavfilter中添加Android.mk文件

>>>>>>>>>>>>>>>>Android.mk

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_STATIC_LIBRARIES := $(FFLIBS)

LOCAL_MODULE := $(FFNAME)

include $(BUILD_STATIC_LIBRARY)

在libavformat中添加Andorid.mk文件

>>>>>>>>>>>>>>>>Android.mk

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)

在libavutil中添加Android.mk文件

>>>>>>>>>>>>>>>>Android.mk

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_STATIC_LIBRARIES := $(FFLIBS)

LOCAL_MODULE := $(FFNAME)

include $(BUILD_STATIC_LIBRARY)

在libpostproc中添加Android.mk文件

>>>>>>>>>>>>>>>>>>>>>>Android.mk

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_STATIC_LIBRARIES := $(FFLIBS)

LOCAL_MODULE := $(FFNAME)

include $(BUILD_STATIC_LIBRARY)

在libswscale中添加Android.mk文件

>>>>>>>>>>>>>>>>>>>>Android.mk

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_STATIC_LIBRARIES := $(FFLIBS)

LOCAL_MODULE := $(FFNAME)

include $(BUILD_STATIC_LIBRARY)

在libavcodec,libavfilter,libavformat,libavutil,libpostproc,libswscale中找到

这行

include $(SUBDIR)../config.mak

和这行

include $(SUBDIR)../subdir.mak

然后把这两行全部删除

接下来就简单了，

进入ffmpeg目录，运行./config.sh脚本

会自动生成config.h和config.mak,如果生成过程出现错误，那么大多就是编译器配置目录的问题了。

然后修改两个文件，把config.h中的

#define restrict restrict

改为

#define restrict

把ffmpeg/libavutil/libm.h中所有static的函数删除。

然后

新建一个ffmpeg_android，着这个文件夹里在建立个jni 然后把我们的ffmpeg放到jni里，同时在jni里在创建一个Android.mk，内容如下

>>>>>>>>>>>>>>>>>>>>>Android.mk

include $(all-subdir-makefiles)

然后目录调到ffmpeg_android运行

/root/android-ndk-r5/ndk-build即可

由于我用的是最新的代码（svn上更新下来的）中间可能会出一些编译错误，比如对for(int i; i

如果有编不出来的，欢迎留言和百度hi联系哈~~~~