Hi,

FFmpeg compiled with Android NDK

Android built-in codec is too small, so we need to FFmpeg. Android provides the NDK, as we use the C language code for FFmpeg which offers convenience.


First create a standard project vPlayer Android

Code:

android create project-n vPlayer-t 8-p vPlayer-k me.abitno.vplayer-a PlayerView

Then vPlayer directory

Code:

mkdir jni & & cd jni
wget http://ffmpeg.org/releases/ffmpeg-0.6.tar.bz2 wget http://ffmpeg.org/releases/ffmpeg-0.6.tar.bz2
tar xf ffmpeg-0.6.tar.bz2 && mv ffmpeg-0.6 ffmpeg && cd ffmpeg tar xf ffmpeg-0.6.tar.bz2 & & mv ffmpeg-0.6 ffmpeg & & cd ffmpeg


In ffmpeg under a new config.sh, which reads as follows, attention to PREBUILT and PLATFORM is set correctly. Also contains some parameters you can adjust, I am mainly a player in order to configure the settings and such.

Code:

 #! / Bin / bash

PREBUILT=/home/abitno/Android/android-ndk-r4/build/prebuilt/linux-x86/arm-eabi-4.4.0 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 PLATFORM = / home/abitno/Android/android-ndk-r4/build/platforms/android-8/arch-arm

./configure --target-os=linux \ . / Configure - target-os = linux \
   --arch=arm \ - Arch = arm \
   --enable-version3 \ - Enable-version3 \
   --enable-gpl \ - Enable-gpl \
   --enable-nonfree \ - Enable-nonfree \
   --disable-stripping \ - Disable-stripping \
   --disable-ffmpeg \ - Disable-ffmpeg \
   --disable-ffplay \ - Disable-ffplay \
   --disable-ffserver \ - Disable-ffserver \
   --disable-ffprobe \ - Disable-ffprobe \
   --disable-encoders \ - Disable-encoders \
   --disable-muxers \ - Disable-muxers \
   --disable-devices \ - Disable-devices \
   --disable-protocols \ - Disable-protocols \
   --enable-protocol=file \ - Enable-protocol = file \
   --enable-avfilter \ - Enable-avfilter \
   --disable-network \ - Disable-network \
   --disable-mpegaudio-hp \ - Disable-mpegaudio-hp \
   --disable-avdevice \ - Disable-avdevice \
   --enable-cross-compile \ - Enable-cross-compile \
   --cc= $ PREBUILT /bin/arm-eabi-gcc \ - Cc = $ PREBUILT / bin / arm-eabi-gcc \
   --cross-prefix= $ PREBUILT /bin/arm-eabi- \ - Cross-prefix = $ PREBUILT / bin/arm-eabi- \
   --nm= $ PREBUILT /bin/arm-eabi-nm \ - Nm = $ PREBUILT / bin / arm-eabi-nm \
   --extra-cflags= " -fPIC -DANDROID " \ - Extra-cflags = "-fPIC-DANDROID" \
   --disable-asm \ - Disable-asm \
   --enable-neon \ - Enable-neon \
   --enable-armv5te \ - 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 " - 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 "


Started running config.sh configure

Code:

chmod + x config.sh
./config.sh . / Config.sh


configure complete, just edit the generated config.h, find the phrase

Code:

# define restrict restrict


Android's GCC does not support the restrict keyword, then modified the following way

Code:

# Define restrict


Edit libavutil / libm.h, static methods to remove them.
Were modified libavcodec, libavfilter, libavformat, libavutil, libpostproc and libswscale under the Makefile, delete the following two

Code:

 include $ (SUBDIR) .. / subdir.mak
include $( SUBDIR ) ../config.mak include $ (SUBDIR) .. / config.mak


To add a file in the ffmpeg av.mk, reads as follows

Code:

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

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

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

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

FFNAME := lib $( NAME ) FFNAME: = lib $ (NAME)
FFLIBS := $( foreach,NAME, $( FFLIBS ) ,lib $( NAME ) ) FFLIBS: = $ (foreach, NAME, $ (FFLIBS), lib $ (NAME))
FFCFLAGS  = -DHAVE_AV_CONFIG_H -Wno-sign-compare -Wno-switch -Wno-pointer-sign FFCFLAGS =-DHAVE_AV_CONFIG_H-Wno-sign-compare-Wno-switch-Wno-pointer-sign
FFCFLAGS += -DTARGET_CONFIG= " config- $( TARGET_ARCH ) .h " FFCFLAGS + =-DTARGET_CONFIG = \ "config-$ (TARGET_ARCH). H "

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

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

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

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


Next step is to add a series of Android.mk, in the root directory jni follows

Code:

include $ (all-subdir-makefiles)


In the ffmpeg directory, Android.mk

Code:

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


libavformat / Android.mk

Code:

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


libavcodec / Android.mk

Code:

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


libavfilter, libavutil, libpostproc and libswscale Android.mk as follows under

Code:

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


Outermost jni / Android.mk and jni / ffmpeg / Android.mk I'm just written this way, you should be rewritten according to their needs.

Finally, run the ndk-build, after a long wait to compile complete

Using libffmpeg.so in Android NDK

So I made up the compiled so file, please download the attachment. Note that this file is compiled with optimizations for NEON, NEON does not support the ARM processor may not run.

Things seem to never written a long time, the following describes the general use of the next, hoping a little help.

Android First you have a project to put the project libffmpeg.so libs/armeabi-v7a / in. Then be prepared to FFmpeg's source files, put them in the directory you like, such as jni / ffmpeg / in.

Edit the items you need to use libffmpeg.so module Android.mk, in the right place to add the following

Code:

LOCAL_C_INCLUDES + = $ (PATH_TO_FFMPEG_SOURCE)
LOCAL_LDLIBS += -L $( PATH_TO_LIBFFMPEG_SO ) -lffmpeg LOCAL_LDLIBS + =-L $ (PATH_TO_LIBFFMPEG_SO)-lffmpeg


FFmpeg source code representative of the variable PATH_TO_FFMPEG_SOURCE path, PATH_TO_LIBFFMPEG_SO is to libffmpeg.so path.

Explain this so contains only avformat, avcodec and avutil three parts, and I also put them into the Android log method applied.

All OK, then you are free to use the FFmpeg.

In addition, the content of this article not been tested, but the content of images, but basically that is the case.
Recommended FFmpeg beginners look at this http://dranger.com/ffmpeg/ffmpeg.html

Conclusion

I think if someone can be encouraged to have a good player for Android and completely free. In our case, if only for S5PC110 optimized, go very well and very fluid.

Will anyone dare?

Download:

Code:

http://www.mediafire.com/?qqsm8r6nz256y70
http://www.fileserve.com/file/9NPhyfz
http://www.multiupload.com/C5CFK45VYO

Thanks,

Alvaro

Alvaro,

Did someone take you up on the offer?

001

Thank you for your share! I have a problem with creating an executable file using ffprobe.c and cmdutils.c.Of course I copy the whole directory to android's directory framework/ and it printed prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/../lib/gcc/arm-eabi/4.4.3/../../../../arm-eabi/bin/ld: out/target/product/pandaboard/obj/STATIC_LIBRARIES/libswscale_intermediates/libswscale.a(utils.o): in function sws_init_context:frameworks/lim-omx-0.6/limoi-components/ffmpeg/src/libswscale/utils.c:786: error: undefined reference to 'av_get_cpu_flags' .
What's matter?
Thanks for attention!

Hi wankeye,

I'm trying to reproduce a mistake, I've tried everything just to put it on and not give me any error ... Can you try again, doing all the steps? If it still fails publishes the entire log and carefully try to solve the error.

Thanks,

Alvaro

Hi Alvaro,I was successfully creating ffmpeg.so with the source version is 0.8 following you tips,and I really apriciated it. but I have problem creating an executable file ffprobe with the files ffprobe.c and cmdutils.c.

Thank you for attention and what you did for us.

Hello wankeye,

I am facing problem in creating ffmpeg.so file which I need to use on android side.
I tried above steps, and i try to comment or resolve error one by one ... but it seems its a never ending process.
Could please share your JNI folder, I would be great help.

Thanks & BR,
Vikas

I am not a lawyer, but wouldn't using both --enable-nonfree and --enable-gpl make it illegal to distribute the resulting binaries? If you enable GPL libraries, the resulting binaries must be GPL which means that the user must be free to modify them in any way he wants. He can not do that if they contain nonfree code.

Thanks,I compiled ffmpeg.so successfully for Android NDK,but I find a error when i use libswscale:
libswscale/utils.c:786: error: undefined reference to 'av_get_cpu_flags'
it means can't link to the 'av_get_cpu_flag' method ,but this method has been defined,
why still has this error?
Thanks for attention!