首先创建一个标准的Android项目vPlayer
android create project -n vPlayer -t 8 -p vPlayer -k me.abitno.vplayer -a PlayerView
然后在vPlayer目录里
mkdir jni && cd jni
wget htt p:/ /ffmpe g.o rg/releases/ffmpeg-0.6.t ar.bz2
tar xf ffmpeg-0.6.tar.bz2 && mv ffmpeg-0.6 ffmpeg && cd ffmpeg
在ffmpeg下新建一个config.sh,内容如下,注意把PREBUILT和PLATFORM设置正确。另外里面有些参数你也可以自行调整,我主要是为了配置一个播放器而这样设置的。
#!/bin/bash
PREBUILT=/home/abitno/Android/android-ndk-r4/build/prebuilt/linux-x86/arm-eabi-4.4.0
PLATFORM=/home/abitno/Android/android-ndk-r4/build/platforms/android-8/arch-arm
./configure --target-os=linux \
--arch=arm \
--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-mpegaudio-hp \
--disable-avdevice \
--enable-cross-compile \
--cc=$PREBUILT/bin/arm-eabi-gcc \
--cross-prefix=$PREBUILT/bin/arm-eabi- \
--nm=$PREBUILT/bin/arm-eabi-nm \
--extra-cflags="-fPIC -DANDROID" \
--disable-asm \
--enable-neon \
--enable-armv5te \
--extra-ldflags="-Wl,-T,$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"
运行config.sh开始configure
chmod +x config.sh
./config.sh
configure完成后,编辑刚刚生成的config.h,找到这句
#define restrict restrict
Android的GCC不支持restrict关键字,于是修改成下面这样
#define restrict
编辑libavutil/libm.h,把其中的static方法都删除。
分别修改libavcodec、libavfilter、libavformat、libavutil、libpostproc和libswscale下的Makefile,把下面两句删除
include $(SUBDIR)../subdir.mak
include $(SUBDIR)../config.mak
在ffmpeg下添加一个文件av.mk,内容如下
# 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))
接下来要添加一系列的Android.mk,在jni根目录下的内容如下
include $(all-subdir-makefiles)
在ffmpeg目录下,Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale
LOCAL_MODULE := ffmpeg
include $(BUILD_SHARED_LIBRARY)
include $(call all-makefiles-under,$(LOCAL_PATH))
libavformat/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)
libavcodec/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)
libavfilter、libavutil、libpostproc和libswscale下的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)
最外层的jni/Android.mk和jni/ffmpeg/Android.mk我只是随便这样写的,你应该根据自己的需求改写
Ⅱ Ubuntu 环境 编译 ffmpeg移植android 的问题!
到FFmpeg官方网站http://www.ffmpeg.org/上去下载源代码,这里下载的源代码是最权威的。进入官网之后,选择”Download”进入下载页面,截止2014年3月28日止,最新的发布的稳定版本为FFmpeg2.2,代号”Muybridge”。选择该下方的”Downloadgzip tarball”进行下载,下载后的文件名为ffmpeg-2.2.tar.gz,大约8.3M。
第二步:在Linux环境下编译FFmpeg
在Windows平台可以采用VMplayer虚拟机上安装ubuntu的方式,本人也是采用这种方式。
本文以/home/dennis为根目录进行操作和说明:
将ffmpeg-2.2.tar.gz拷贝至根目录,然后执行如下解压命令将其解压:
$tar zxf ffmpeg-2.2.tar.gz
解压后将得到/home/dennis/ffmpeg-2.2目录。
Ⅲ 如何用Android NDK编译FFmpeg
Android内置的编解码器实在太少,于是我们需要FFmpeg。Android提供了NDK,为我们使用FFmpeg这种C语言代码提供了方便。
不过为了用NDK编译FFmpeg,还真的花费了不少时间,也得到了很多人的帮助,最应该谢谢havlenapetr。我觉得我现在这些方法算是比较简洁的了--
下面就尽量详细的说一下我是怎么在项目中使用FFmpeg的,但是基于我混乱的表达能力,有不明白的就问我。
你得了解JNI和Android NDK的基本用法,若觉得我的文章还不错,可以看之前写的JNI简单入门和Android NDK入门
首先创建一个标准的Android项目vPlayer
android create project -n vPlayer -t 8 -p vPlayer -k me.abitno.vplayer -a PlayerView
然后在vPlayer目录里
mkdir jni && cd jni
wget http //ffmpeg org/releases/ffmpeg-0.6.tar.bz2
tar xf ffmpeg-0.6.tar.bz2 && mv ffmpeg-0.6 ffmpeg && cd ffmpeg
在ffmpeg下新建一个config.sh,内容如下,注意把PREBUILT和PLATFORM设置正确。另外里面有些参数你也可以自行调整,我主要是为了配置一个播放器而这样设置的。
#!/bin/bash
PREBUILT=/home/abitno/Android/android-ndk-r4/build/prebuilt/linux-x86/arm-eabi-4.4.0
PLATFORM=/home/abitno/Android/android-ndk-r4/build/platforms/android-8/arch-arm
./configure --target-os=linux \
--arch=arm \
--enable-version3 \
--enable-gpl \
--enable-nonfree \
--disable-stripping \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffserver \
--disable-ffprobe \
--disable-encoders \
--disable-muxers \
--disable-devices \
--disable-protocols \
--enable-protocol=file \
--enable-avfilter \
--disable-network \
--disable-mpegaudio-hp \
--disable-avdevice \
--enable-cross-compile \
--cc=$PREBUILT/bin/arm-eabi-gcc \
--cross-prefix=$PREBUILT/bin/arm-eabi- \
--nm=$PREBUILT/bin/arm-eabi-nm \
--extra-cflags="-fPIC -DANDROID" \
--disable-asm \
--enable-neon \
--enable-armv5te \
--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"
运行config.sh开始configure
chmod +x config.sh
./config.sh
configure完成后,编辑刚刚生成的config.h,找到这句
#define restrict restrict
Android的GCC不支持restrict关键字,于是修改成下面这样
#define restrict
编辑libavutil/libm.h,把其中的static方法都删除。
分别修改libavcodec、libavfilter、libavformat、libavutil、libpostproc和libswscale下的Makefile,把下面两句删除
include $(SUBDIR)../subdir.mak
include $(SUBDIR)../config.mak
在ffmpeg下添加一个文件av.mk,内容如下
# 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))
接下来要添加一系列的Android.mk,在jni根目录下的内容如下
include $(all-subdir-makefiles)
在ffmpeg目录下,Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale
LOCAL_MODULE := ffmpeg
include $(BUILD_SHARED_LIBRARY)
include $(call all-makefiles-under,$(LOCAL_PATH))
libavformat/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)
libavcodec/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)
libavfilter、libavutil、libpostproc和libswscale下的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)
最外层的jni/Android.mk和jni/ffmpeg/Android.mk我只是随便这样写的,你应该根据自己的需求改写。
最后运行ndk-build,经过漫长的等待就编译完成了。至于具体怎么应用可能以后会写,我变得太懒了。。。
转载,仅供参考,祝你愉快,满意请采纳。
Ⅳ 如何用Android NDK编译FFmpeg
Android NDK编译FFmpeg可以采用cygwin方法来实现。
具体步骤:
首先是config脚本,编译ffmpeg之前必须得先configure一下,configure是一个shell脚本,根据命令行参数不同来裁剪模块,生成特定的config.h文件。
confiure脚本文件在ffmpeg目录里可以找到。
重新建立以个shell脚本文件config.sh,这个文件只是为了编译方便。
例子:
注意:
编写config脚本时候,其中的路径需要使用windows形式的路径,不能使用/cygwindriver/d/android 这种格式的路径。