mac下编译ffmpeg1.1.4

经过一番网上搜索 与 无数次的编译  终于成功了
下面献上编译步骤：

1、下载NDK同时配置NDK环境NDK下载；下载ffmpeg-1.1源码ffmpeg-1.1下载
2、把ffmpeg解压到一个NDK项目文档下，如下：
/Users/zhaoshun/android/android-ndk-r8/samples/project1/jni/ffmpeg-1.1.4，重命名为
/Users/zhaoshun/android/android-ndk-r8/samples/project1/jni/ffmpeg
3、在jni目录下添加如下文件Android.mk ，内容如下：
include $(all-subdir-makefiles)
在jni/ffmpeg下添加Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_WHOLE_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale libswresample
LOCAL_MODULE := ffmpeg
include $(BUILD_SHARED_LIBRARY)
include $(call all-makefiles-under,$(LOCAL_PATH))

在jni/ffmpeg下添加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))

在jni/ffmpeg/libavformat下添加Android.mk内容如下：
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jni/ffmpeg/libavcodec下添加Android,mk内容如下：
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jni/ffmpeg/libavutil libpostproc libswscale libswresample 下添加Android,mk内容如下：
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jni/ffmpeg 下添加可执行文件config.sh, 内容如下
*由于经常编译进行 下面第5步d修改的时候，比较麻烦，研究了下，直接写在config.sh中 ,下文中sed 开始为新加入的代码。这样 5(d）步骤就可以不用做了
#!/bin/bash
PREBUILT=/Users/zhaoshun/android/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86
PLATFORM=/Users/zhaoshun/android/android-ndk-r8/platforms/android-9/arch-arm
./configure --target-os=linux \
--arch=arm \
--enable-version3 \
--enable-gpl \
--enable-nonfree \
--enable-shared \
--disable-stripping \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffserver \
--disable-ffprobe \
--disable-symver \
--enable-encoders \
--enable-muxers \
--disable-devices \
--disable-protocols \
--enable-protocol=file \
--enable-avfilter \
--disable-network \
--disable-avdevice \
--disable-asm \
--enable-cross-compile \
--cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
--cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
--strip=$PREBUILT/bin/arm-linux-androideabi-strip \
--extra-cflags="-fPIC -DANDROID" \
--extra-ldflags="-Wl,-T,$PREBUILT/arm-linux-androideabi/lib/ldscripts/armelf_linux_eabi.x -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtbegin.o $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtend.o -lc -lm -ldl" \

sed -i 's/HAVE_LRINT 0/HAVE_LRINT 1/g' config.h
sed -i 's/HAVE_LRINTF 0/HAVE_LRINTF 1/g' config.h
sed -i 's/HAVE_ROUND 0/HAVE_ROUND 1/g' config.h
sed -i 's/HAVE_ROUNDF 0/HAVE_ROUNDF 1/g' config.h
sed -i 's/HAVE_TRUNC 0/HAVE_TRUNC 1/g' config.h
sed -i 's/HAVE_TRUNCF 0/HAVE_TRUNCF 1/g' config.h
sed -i 's/HAVE_CBRT 0/HAVE_CBRT 1/g' config.h
sed -i 's/HAVE_CBRTF 0/HAVE_CBRTF 1/g' config.h
sed -i 's/HAVE_ISINF 0/HAVE_ISINF 1/g' config.h
sed -i 's/HAVE_ISNAN 0/HAVE_ISNAN 1/g' config.h
sed -i 's/HAVE_SINF 0/HAVE_SINF 1/g' config.h
sed -i 's/HAVE_RINT 0/HAVE_RINT 1/g' config.h
上面PREBUILT PLATFORM的路径自己根据NDK的路径自己更改，并增加可执行权限，命令如下：
chmod a+x config.sh

4、命令行到jni/ffmpeg目录下执行
./config.sh

5、修改
a、删除 libavformat libavcodec libavutil libpostproc libswscale libswresample 目录下Makefile下的
include $(SUBDIR)../config.mak
b、删除libavcodec libavutil libswresample目录下Makefile下的
log2_tab.o \
c、修改jni/ffmpeg/config.h下的
#define avrestrict restrict为#define restrict
d、修改jni/ffmpeg/config.h下的
HAVE_ISINF 0
HAVE_ISNAN 0
HAVE_SINF 0
HAVE_RINT 0
HAVE_LRINT 0
HAVE_LRINTF 0
HAVE_ROUND 0
HAVE_ROUNDF 0
HAVE_TRUNCF 0
HAVE_TRUNC 0
HAVE_CBRT 0
HAVE_CBRTF 0
的值修改为1，例如：HAVE_TRUNC 1
同时相应的修改jni/ffmpeg/config.mak 的值
例如：！HAVE_LRINT =yes为HAVE_LRINT =yes
上面修改也可以用下面方法替换*注释掉/jni/ffmpeg/libavutil 目录中的 libm.h下的所有静态（static）方法
e、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/mux.c:39:30
ffmpeg/libavformat/utils.c:40
ffmpeg/libavutil/time.c:36
具体原因是由于下面的问题2,目前个人能力只能用这个方法，有朋友知道具体原因或者更好的方法的话，麻烦回复下
6、接下来就是编译了
cd ..
命令行到项目project1目录下执行
ndk-build


最后加上自己编译的so库