Yet another ffmpeg/libx264 issue

问题

My current situation is; ffmpeg and libx264 has been compiled for Android, as shared and static libraries respectively. Since I have libx264.a and libffmpeg.so with me, only thing that remains is to link them and obtain a ffmpeg library that would allow me to proceed with my application. However, some questions remain unanswered. I am using Ubuntu with a virtual machine under Windows 7. I am using x264's last version, ffmpeg 0.10.4 release and NDK 7.

I have tried to adjust flags (extracf and extrald) in order to include libx264 to ffmpeg compilation process as well, however I keep failing. Below you may find my build script for ffmpeg and the errors I have encountered.

NDK=~/Android_NDK_r7b 
PLATFORM=$NDK/platforms/android-8/arch-arm/ 
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86 
x264=/usr/local 
#x264v2=~/x264 
function build_one 
{ 
./configure --target-os=linux \ 
    --prefix=$PREFIX \ 
    --enable-cross-compile \ 
    --extra-libs="-lgcc" \ 
    --arch=arm \ 
    --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \ 
    --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \ 
    --nm=$PREBUILT/bin/arm-linux-androideabi-nm \ 
    --sysroot=$PLATFORM \ 
   # --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \ 
    --extra-cflags="-I$x264/include" \ 
    --enable-shared \ 
    --enable-static \ 
    #--extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib  -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \ 
    --extra-ldflags="-L$x264/lib" \ 
   --disable-everything \ 
   # --enable-demuxer=mov \ 
   # --enable-demuxer=h264 \ 
   # --disable-ffplay \ 
    --enable-gpl \ 
    --enable-libx264 \ 
   # --enable-protocol=file \ 
   # --enable-avformat \ 
   # --enable-avcodec \ 
   # --enable-encoder=libx264 \ 
   # --enable-decoder=rawvideo \ 
   #--enable-decoder=mjpeg \ 
   # --enable-decoder=h263 \ 
   # --enable-decoder=mpeg4 \ 
   # --enable-encoder=h264 \ 
   # --disable-network \ 
    #--enable-zlib \ 
   # --disable-avfilter \ 
    #--disable-avdevice \ 
    $ADDITIONAL_CONFIGURE_FLAG 

make clean 
make  -j4 install 
$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o 
$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a 
} 

#arm v7vfpv3 
CPU=armv7-a 
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU " 
PREFIX=./androidIncludeTrialsNDK7/$CPU 
ADDITIONAL_CONFIGURE_FLAG= 
build_one

If I basically delete the lines extracf and extrald flags and use other ones (commented outs), it works fine except libx264 not found error. Otherwise, I get the following erros.

./buildnew.sh: line 35: --extra-cflags=-I/usr/local/include: No such file or directory 
./buildnew.sh: line 38: --extra-ldflags=-L/usr/local/lib: No such file or directory 
./buildnew.sh: line 40: --disable-everything: command not found 
./buildnew.sh: line 44: --enable-gpl: command not found

The compilation process ends with the following.

make: *** [libavdevice/v4l.o] Error 1 
make: *** Waiting for unfinished jobs.... 
/home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ar: creating libavcodec/libavcodec.a 
/home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ld: cannot open output file ./androidIncludeTrialsNDK7/armv7-a/libffmpeg.so: No such file or directory

I have x264 installed in my directory /home/mehmet/x264 and I also check whereis x264.a, it shows me as /usr/local/lib. I have tried changing the path $x264 to point out to home/mehmet/x264 folder, but I get the same error.

Lastly, if I enable both extracf and extrald flags ( both commented ones and the used ones) . I get the same error mentioned above. I am afraid I am doing a simple typo here, but can`t see it and it is driving me crazy. Thanks a lot for your help.

Best.

EDIT

I have deleted the comments and now obtain the following.

./buildnew.sh: 4: ./buildnew.sh: function: not found
ERROR: libx264 not found

Above error is observed from the terminal when I run the script. It build upto some point and finishes the process with the following error.

libavcodec/libavcodec.a(libx264.o): In function `X264_frame':
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:159: undefined reference to `x264_picture_init'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:179: undefined reference to `x264_encoder_reconfig'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:191: undefined reference to `x264_encoder_encode'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:197: undefined reference to `x264_encoder_delayed_frames'
libavcodec/libavcodec.a(libx264.o): In function `encode_nals':
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:196: undefined reference to `x264_bit_depth'
libavcodec/libavcodec.a(libx264.o): In function `X264_close':
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:231: undefined reference to `x264_encoder_close'
libavcodec/libavcodec.a(libx264.o): In function `X264_init':
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:284: undefined reference to `x264_param_default'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:292: undefined reference to `x264_param_default_preset'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:305: undefined reference to `x264_param_parse'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:502: undefined reference to `x264_param_apply_fastfirstpass'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:505: undefined reference to `x264_param_apply_profile'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:544: undefined reference to `x264_encoder_open_125'
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:554: undefined reference to `x264_encoder_headers'
./buildnew.sh: 51: ./buildnew.sh: build_one: not found

回答1:

Your errors are nothing to do with ffmpeg/libx264. You cannot have those comments in the middle. Look at the error

./buildnew.sh: line 35: --extra-cflags=-I/usr/local/include: No such file or directory

It thinks --extra-cflags is a command and so on for everyline that is the first one after the comment.

Your command should be continous and without any comments. The "\" operator does not work from comments.

来源：https://stackoverflow.com/questions/12200172/yet-another-ffmpeg-libx264-issue

标签

android

Ubuntu

ffmpeg

shared-libraries

libx264