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• ffmpeg installation undefined reference to

  8 février 2017, par user1683302

  I used this official link to download ffmpeg and compile it. I know it creates a static library and I have to reference the library folder. When i try to compile this tutorial . i get this errors

  tutorial01.c: In function ‘main’:
  
  tutorial01.c:96:5: warning: ‘codec’ is deprecated [-Wdeprecated- declarations]
  
   if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
  
   ^
  
  In file included from tutorial01.c:27:0:
  
   /home/osboxes/ffmpeg_build/include/libavformat/avformat.h:893:21: note:  declared here
  
   AVCodecContext *codec;
  
                   ^
  
  tutorial01.c:104:3: warning: ‘codec’ is deprecated [-Wdeprecated-declarations]
  
  pCodecCtxOrig=pFormatCtx->streams[videoStream]->codec;
  
  ^
  
  In file included from tutorial01.c:27:0:
  
  /home/osboxes/ffmpeg_build/include/libavformat/avformat.h:893:21: note: declared here
  
   AVCodecContext *codec;
  
                   ^
  
  tutorial01.c:113:3: warning: ‘avcodec_copy_context’ is deprecated  [-Wdeprecated-declarations]
  
   if(avcodec_copy_context(pCodecCtx, pCodecCtxOrig) != 0) {
  
   ^
  
  In file included from tutorial01.c:26:0:
  
  /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:4240:5: note: declared here
  
  int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
  
   ^
  
  tutorial01.c:131:3: warning: ‘avpicture_get_size’ is deprecated   [-Wdeprecated-declarations]
  
   numBytes=avpicture_get_size(AV_PIX_FMT_RGB24, pCodecCtx->width,
  
   ^
  
   In file included from tutorial01.c:26:0:
  
   /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:5467:5: note: declared here
  
   int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
  
   ^
  
    tutorial01.c:138:3: warning: ‘avpicture_fill’ is deprecated [-Wdeprecated-declarations]
  
     avpicture_fill((AVPicture *)pFrameRGB, buffer, AV_PIX_FMT_RGB24,
  
     ^
  
    In file included from tutorial01.c:26:0:
  
    /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:5452:5: note: declared here
  
    int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
  
   ^
  
     tutorial01.c:160:7: warning: ‘avcodec_decode_video2’ is deprecated [-Wdeprecated-declarations]
  
         avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
  
         ^
  
   In file included from tutorial01.c:26:0:
  
    /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:4811:5: note: declared here
  
    int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
  
   ^
  
    tutorial01.c:177:5: warning: ‘av_free_packet’ is deprecated [-Wdeprecated-declarations]
  
    av_free_packet(&packet);
  
    ^
  
   In file included from tutorial01.c:26:0:
  
   /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:4472:6: note: declared here
  
   void av_free_packet(AVPacket *pkt);
  
    ^
  
  /tmp/ccHYDd9j.o: In function `main':
  
  tutorial01.c:(.text+0x178): undefined reference to `av_register_all'
  
  tutorial01.c:(.text+0x19f): undefined reference to `avformat_open_input'
  
  tutorial01.c:(.text+0x1c1): undefined reference to `avformat_find_stream_info'
  
  tutorial01.c:(.text+0x1f6): undefined reference to `av_dump_format'
  
  tutorial01.c:(.text+0x2ab): undefined reference to `avcodec_find_decoder'
  
  tutorial01.c:(.text+0x2ea): undefined reference to `avcodec_alloc_context3'
  
  tutorial01.c:(.text+0x304): undefined reference to `avcodec_copy_context'
  
  tutorial01.c:(.text+0x348): undefined reference to `avcodec_open2'
  
  tutorial01.c:(.text+0x35b): undefined reference to `av_frame_alloc'
  
  tutorial01.c:(.text+0x367): undefined reference to `av_frame_alloc'
  
  tutorial01.c:(.text+0x3a4): undefined reference to `avpicture_get_size'
  
  tutorial01.c:(.text+0x3ba): undefined reference to `av_malloc'
  
  tutorial01.c:(.text+0x3ef): undefined reference to `avpicture_fill'
  
  tutorial01.c:(.text+0x439): undefined reference to `sws_getContext'
  
  tutorial01.c:(.text+0x47d): undefined reference to `avcodec_decode_video2'
  
  tutorial01.c:(.text+0x4de): undefined reference to `sws_scale'
  
  tutorial01.c:(.text+0x527): undefined reference to `av_free_packet'
  
  tutorial01.c:(.text+0x53d): undefined reference to `av_read_frame'
  
  tutorial01.c:(.text+0x551): undefined reference to `av_free'
  
  tutorial01.c:(.text+0x560): undefined reference to `av_frame_free'
  
  tutorial01.c:(.text+0x56f): undefined reference to `av_frame_free'
  
  tutorial01.c:(.text+0x57b): undefined reference to `avcodec_close'
  
  tutorial01.c:(.text+0x58a): undefined reference to `avcodec_close'
  
  tutorial01.c:(.text+0x599): undefined reference to `avformat_close_input'
  
  collect2: error: ld returned 1 exit status

  i used this sudo gcc -I /home/osboxes/ffmpeg_build/include -L /home/osboxes/ffmpeg_build/lib -lavcode -lavformat -lavutil -lswscale -lz -lm tutorial01.c

  my ffmpeg is

   ffmpeg version N-82113-g490c6bd Copyright (c) 2000-2016 the FFmpeg developers
  
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.2) 20160609
  
     configuration: --prefix=/home/osboxes/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/osboxes/ffmpeg_build/include --extra-ldflags=- L/home/osboxes/ffmpeg_build/lib --bindir=/home/osboxes/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libopus --enable-libx264 --enable-nonfree
  
    libavutil      55. 33.100 / 55. 33.100
  
    libavcodec     57. 63.103 / 57. 63.103
  
    libavformat    57. 55.100 / 57. 55.100
  
    libavdevice    57.  0.103 / 57.  0.103
  
    libavfilter     6. 64.100 /  6. 64.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  2.100 /  2.  2.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  the tutorial code was update to work on new ffmpeg versions.I’m using VM Ubuntu 16.0.4 64 bit fresh install on windows 10 host.

  so why I’m having all of these errors ?

  Update :
  I moved to Ubuntu 12.04 VM and ffmpeg 0.11, I instilled it with opencv 2.4.2 here is the link . This should work yet i don’t why I’m having hard time compiling such small program.

  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
   built on Oct 25 2016 13:39:37 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame    --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-shared --enable-pic
  
   libavutil      51. 54.100 / 51. 54.100
  
   libavcodec     54. 23.100 / 54. 23.100
  
   libavformat    54.  6.100 / 54.  6.100
  
   libavdevice    54.  0.100 / 54.  0.100
  
   libavfilter     2. 77.100 /  2. 77.100
  
   libswscale      2.  1.100 /  2.  1.100
  
   libswresample   0. 15.100 /  0. 15.100
  
   libpostproc    52.  0.100 / 52.  0.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  yet i still have the problem but it is less sever

   gcc -o tutorial01 tutorial01.c -Wl,--start-group -lavcodec -lavformat  -lswscale -lavutil -lz -lm -Wl,--end-group     
  
    /tmp/ccnFfu84.o: In function `main':
  
    tutorial01.c:(.text+0x500): undefined reference to `avcodec_free_frame'
  
    tutorial01.c:(.text+0x511): undefined reference to `avcodec_free_frame'
  
    collect2: ld returned 1 exit status

  i tried this ldconfig -p | grep av

    libxklavier.so.16 (libc6,x86-64) => /usr/lib/libxklavier.so.16
  
    libwavpack.so.1 (libc6,x86-64) => /usr/lib/x86_64-linux gnu/libwavpack.so.1
  
  libjavascriptcoregtk-3.0.so.0 (libc6,x86-64) => /usr/lib/libjavascriptcoregtk-3.0.so.0
  
  libdvdnavmini.so.4 (libc6,x86-64) => /usr/lib/libdvdnavmini.so.4
  
  libdvdnav.so.4 (libc6,x86-64) => /usr/lib/libdvdnav.so.4
  
  libavutil.so.51 (libc6,x86-64) => /usr/local/lib/libavutil.so.51
  
  libavutil.so.51 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavutil.so.51
  
  libavutil.so (libc6,x86-64) => /usr/local/lib/libavutil.so
  
  libavformat.so.54 (libc6,x86-64) => /usr/local/lib/libavformat.so.54
  
  libavformat.so.53 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavformat.so.53
  
  libavformat.so (libc6,x86-64) => /usr/local/lib/libavformat.so
  
  libavfilter.so.2 (libc6,x86-64) => /usr/local/lib/libavfilter.so.2
  
  libavfilter.so (libc6,x86-64) => /usr/local/lib/libavfilter.so
  
  libavdevice.so.54 (libc6,x86-64) => /usr/local/lib/libavdevice.so.54
  
  libavdevice.so (libc6,x86-64) => /usr/local/lib/libavdevice.so
  
  libavc1394.so.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavc1394.so.0
  
  libavcodec.so.54 (libc6,x86-64) => /usr/local/lib/libavcodec.so.54
  
  libavcodec.so.53 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavcodec.so.53
  
  libavcodec.so (libc6,x86-64) => /usr/local/lib/libavcodec.so
  
  libavahi-ui-gtk3.so.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-ui-gtk3.so.0
  
  libavahi-gobject.so.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-gobject.so.0
  
  libavahi-glib.so.1 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-glib.so.1
  
  libavahi-core.so.7 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-core.so.7
  
  libavahi-common.so.3 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
  
  libavahi-common.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-common.so
  
  libavahi-client.so.3 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
  
  libavahi-client.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-client.so

  Update2

  I changged avcodec_free_frame to av_free and the file complied

  Dranger code is old

  Update 3
  i downloaded ffmpeg 1.0.10 which has the same library version that is the tutorial tested on. Everything complied without any problem now.

• The Android build FFMPEG encounter problems

  19 octobre 2016, par 晓Lee

  I write an Android test App on Ubuntu, the NDK - BUILD, appeared

  / home/lee/Work/Android/the NDK/Android - the NDK - r10e toolchains/arm - Linux - androideabi - 4.8 / prebuilt/Linux - x86_64 / bin /../ lib/GCC/arm - Linux - androideabi / 4.8 /../../../../ arm - Linux - androideabi/bin/ld : error : always find - lGLESv2
  Collect2 : error : ld returned 1 exit status
  Make : * * * [obj/local/armeabi/libffmpeg so] Error 1

  FFmpeg is version 3.1.4,and the NDK version is r10e

• undefined reference to ffmpeg functions in native code using Android Studio 2.2

  12 octobre 2016, par Krzysztof Kansy

  I have a problem with using ffmpeg in Android Studio 2.2 using NDK 13 and new Cmake building system. FFmpeg version is 3.1.4.
  The system I’m working on is Linux Mint 18 64-bit.
  At the build time I’m getting undefined reference error each time I use ffpeg functions.

  My MainActivity.java :

  public class MainActivity extends AppCompatActivity {
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
      // Example of a call to a native method
  
      TextView tv = (TextView) findViewById(R.id.sample_text);
  
      tv.setText(stringFromJNI());
  
      }
  
  
  
      /**
  
       * A native method that is implemented by the 'native-lib' native library,
  
       * which is packaged with this application.
  
       */
  
      public native String stringFromJNI();
  
  
  
      // Used to load the 'native-lib' library on application startup.
  
      static {
  
          System.loadLibrary("native-lib");
  
      }
  
  }

  My native class (undefined reference is pointing to av_init_packet(&avPacket)) :

  #include 
  
  #include <string>
  
  #include <android></android>log.h>
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  
  
  
  
  extern "C"
  
  jstring
  
  Java_com_example_tito_jnitest_MainActivity_stringFromJNI(
  
          JNIEnv* env,
  
          jobject /* this */) {
  
  
  
      std::string hello = "Hello from C++";
  
  
  
      __android_log_print(ANDROID_LOG_INFO, "JNItest", "Hello from JNI!");
  
  
  
      AVPacket avPacket;
  
      av_init_packet(&amp;avPacket);
  
  
  
      return env->NewStringUTF(hello.c_str());
  
  }
  
  </string>

  build.gradle script

  apply plugin: 'com.android.application'
  
  
  
  android {
  
      compileSdkVersion 24
  
      buildToolsVersion "24.0.3"
  
      defaultConfig {
  
          applicationId "com.example.tito.jnitest"
  
          minSdkVersion 19
  
          targetSdkVersion 24
  
          versionCode 1
  
          versionName "1.0"
  
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  
          externalNativeBuild {
  
              cmake {
  
                  // Passes optional arguments to CMake.
  
                  cppFlags "-frtti -fexceptions"
  
                  abiFilters 'armeabi'
  
              }
  
          }
  
      }
  
  
  
      sourceSets {
  
          main {
  
              jniLibs.srcDirs = ['/home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs']
  
          }
  
      }
  
  
  
      buildTypes {
  
          release {
  
              minifyEnabled false
  
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
          }
  
      }
  
      externalNativeBuild {
  
          cmake {
  
              path "CMakeLists.txt"
  
          }
  
      }
  
  }
  
  
  
  dependencies {
  
      compile fileTree(dir: 'libs', include: ['*.jar'])
  
      androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
  
          exclude group: 'com.android.support', module: 'support-annotations'
  
      })
  
      compile 'com.android.support:appcompat-v7:24.2.1'
  
      testCompile 'junit:junit:4.12'
  
  }

  CMakeLists.txt

  cmake_minimum_required(VERSION 3.4.1)
  
  
  
  include_directories(/home/tito/Android/Sdk/ndk-bundle/sources/ffmpeg-3.1.4/android/${ANDROID_ABI}/include)
  
  
  
  #set(CMAKE_VERBOSE_MAKEFILE on)
  
  #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
  
  
  
  add_library( avutil
  
               SHARED
  
               IMPORTED )
  
  
  
  set_target_properties(
  
                  avutil
  
                  PROPERTIES IMPORTED_LOCATION
  
                  /home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs/${ANDROID_ABI}/libavutil-55.so )
  
  
  
  add_library( swscale
  
               SHARED
  
               IMPORTED )
  
  
  
  set_target_properties(
  
                  swscale
  
                  PROPERTIES IMPORTED_LOCATION
  
                  /home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs/${ANDROID_ABI}/libswscale-4.so )
  
  
  
  add_library( swresample
  
               SHARED
  
               IMPORTED )
  
  
  
  set_target_properties(
  
                  swresample
  
                  PROPERTIES IMPORTED_LOCATION
  
                  /home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs/${ANDROID_ABI}/libswresample-2.so )
  
  
  
  add_library( avcodec
  
               SHARED
  
               IMPORTED )
  
  
  
  set_target_properties(
  
                  avcodec
  
                  PROPERTIES IMPORTED_LOCATION
  
                  /home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs/${ANDROID_ABI}/libavcodec-57.so )
  
  
  
  add_library( avfilter
  
               SHARED
  
               IMPORTED )
  
  
  
  set_target_properties(
  
                  avfilter
  
                  PROPERTIES IMPORTED_LOCATION
  
                  /home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs/${ANDROID_ABI}/libavfilter-6.so )
  
  
  
  add_library( avformat
  
               SHARED
  
               IMPORTED )
  
  
  
  set_target_properties(
  
                  avformat
  
                  PROPERTIES IMPORTED_LOCATION
  
                  /home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs/${ANDROID_ABI}/libavformat-57.so )
  
  
  
  add_library( avdevice
  
               SHARED
  
               IMPORTED )
  
  
  
  set_target_properties(
  
                  avdevice
  
                  PROPERTIES IMPORTED_LOCATION
  
                  /home/tito/AndroidStudioProjects/JNItest/app/src/main/jniLibs/${ANDROID_ABI}/libavdevice-57.so )
  
  
  
  add_library( native-lib
  
               SHARED
  
               src/main/cpp/native-lib.cpp )
  
  
  
  find_library( log-lib
  
                log )
  
  
  
  target_link_libraries(native-lib ${log-lib} avutil swscale swresample avcodec avfilter avformat avdevice)

  Build process of ffmpeg seemed to be successful. Here’s my build script :

  #!/bin/bash
  
  NDK=/home/tito/Android/Sdk/ndk-bundle
  
  SYSROOT=$NDK/platforms/android-19/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
  
  function build_one
  
  {
  
  ./configure \
  
  --prefix=$PREFIX \
  
  --disable-static \
  
  --enable-shared \
  
  --disable-doc \
  
  --disable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver \
  
  --disable-doc \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --target-os=linux \
  
  --arch=arm \
  
  --enable-cross-compile \
  
  --sysroot=$SYSROOT \
  
  --extra-cflags="-Os -fpic -marm" \
  
  --extra-ldflags="-marm" \
  
  $ADDITIONAL_CONFIGURE_FLAG
  
  make clean
  
  make
  
  make install
  
  }
  
  CPU=armeabi
  
  PREFIX=$(pwd)/android/$CPU
  
  build_one

  One thing I noticed that could indicate that something is wrong with ffmpeg build is warning WARNING: /home/tito/Android/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-pkg-config not found, library detection may fail. during building. I’m not sure if this may be cause of problems.
  

  I was trying to build for all of the ABIs, but for now I decided to focus on making just armeabi working. I’m having exact same failure after using e.g. arm64-v8a.

  Finally, here is the gradle console’s content with error :

  Executing tasks: [:app:assembleDebug]
  
  
  
  Configuration on demand is an incubating feature.
  
  Incremental java compilation is an incubating feature.
  
  :app:preBuild UP-TO-DATE
  
  :app:preDebugBuild UP-TO-DATE
  
  :app:checkDebugManifest
  
  :app:preReleaseBuild UP-TO-DATE
  
  :app:prepareComAndroidSupportAnimatedVectorDrawable2421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportAppcompatV72421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportSupportCompat2421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportSupportCoreUi2421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportSupportCoreUtils2421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportSupportFragment2421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportSupportMediaCompat2421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportSupportV42421Library UP-TO-DATE
  
  :app:prepareComAndroidSupportSupportVectorDrawable2421Library UP-TO-DATE
  
  :app:prepareDebugDependencies
  
  :app:compileDebugAidl UP-TO-DATE
  
  :app:compileDebugRenderscript UP-TO-DATE
  
  :app:generateDebugBuildConfig UP-TO-DATE
  
  :app:generateDebugResValues UP-TO-DATE
  
  :app:generateDebugResources UP-TO-DATE
  
  :app:mergeDebugResources UP-TO-DATE
  
  :app:processDebugManifest UP-TO-DATE
  
  :app:processDebugResources
  
  :app:generateDebugSources
  
  :app:incrementalDebugJavaCompilationSafeguard UP-TO-DATE
  
  :app:compileDebugJavaWithJavac UP-TO-DATE
  
  :app:generateJsonModelDebug UP-TO-DATE
  
  :app:externalNativeBuildDebug
  
    building /home/tito/AndroidStudioProjects/JNItest/app/build/intermediates/cmake/debug/obj/armeabi/libnative-lib.so
  
  :app:externalNativeBuildDebug FAILED
  
  
  
  FAILURE: Build failed with an exception.
  
  
  
  * What went wrong:
  
  Execution failed for task ':app:externalNativeBuildDebug'.
  
  > Build command failed.
  
    Error while executing '/home/tito/Android/Sdk/cmake/3.6.3155560/bin/cmake' with arguments {--build /home/tito/AndroidStudioProjects/JNItest/app/.externalNativeBuild/cmake/debug/armeabi --target native-lib}
  
    [1/2] Building CXX object CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o
  
    [2/2] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/armeabi/libnative-lib.so
  
    FAILED: : && /home/tito/Android/Sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++  -target armv5te-none-linux-androideabi -gcc-toolchain /home/tito/Android/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64 --sysroot=/home/tito/Android/Sdk/ndk-bundle/platforms/android-19/arch-arm -fPIC -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv5te -mtune=xscale -msoft-float -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv5te -mtune=xscale -msoft-float -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -frtti -fexceptions -O0 -fno-limit-debug-info -O0 -fno-limit-debug-info  -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ../../../../build/intermediates/cmake/debug/obj/armeabi/libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o  /home/tito/Android/Sdk/ndk-bundle/platforms/android-19/arch-arm/usr/lib/liblog.so ../../../../src/main/jniLibs/armeabi/libavutil-55.so ../../../../src/main/jniLibs/armeabi/libswscale-4.so ../../../../src/main/jniLibs/armeabi/libswresample-2.so ../../../../src/main/jniLibs/armeabi/libavcodec-57.so ../../../../src/main/jniLibs/armeabi/libavfilter-6.so ../../../../src/main/jniLibs/armeabi/libavformat-57.so ../../../../src/main/jniLibs/armeabi/libavdevice-57.so -lm "/home/tito/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi/libgnustl_static.a" "-latomic" && :
  
    /home/tito/AndroidStudioProjects/JNItest/app/src/main/cpp/native-lib.cpp:18: error: undefined reference to 'av_init_packet(AVPacket*)'
  
    clang++: error: linker command failed with exit code 1 (use -v to see invocation)
  
    ninja: build stopped: subcommand failed.
  
  
  
  
  
  * Try:
  
  Run with --info or --debug option to get more log output.
  
  
  
  * Exception is:
  
  org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:externalNativeBuildDebug'.
  
      at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
  
      at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
  
      at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
  
      at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:66)
  
      at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
  
      at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)
  
      at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
  
      at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
  
      at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
  
      at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203)
  
      at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185)
  
      at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66)
  
      at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)
  
      at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:25)
  
      at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:110)
  
      at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37)
  
      at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
  
      at org.gradle.execution.DefaultBuildExecuter.access$000(DefaultBuildExecuter.java:23)
  
      at org.gradle.execution.DefaultBuildExecuter$1.proceed(DefaultBuildExecuter.java:43)
  
      at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
  
      at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
  
      at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:30)
  
      at org.gradle.initialization.DefaultGradleLauncher$4.run(DefaultGradleLauncher.java:153)
  
      at org.gradle.internal.Factories$1.create(Factories.java:22)
  
      at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
  
      at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)
  
      at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:150)
  
      at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
  
      at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:98)
  
      at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:92)
  
      at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
  
      at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)
  
      at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:92)
  
      at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:83)
  
      at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:99)
  
      at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:46)
  
      at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
  
      at org.gradle.tooling.internal.provider.runner.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:58)
  
      at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
  
      at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:48)
  
      at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
  
      at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:81)
  
      at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:46)
  
      at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:52)
  
      at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
  
      at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
  
      at org.gradle.util.Swapper.swap(Swapper.java:38)
  
      at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:47)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
  
      at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72)
  
      at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41)
  
      at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  
      at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
  
      at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:237)
  
      at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
  
      at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
  
  Caused by: org.gradle.internal.UncheckedException: Build command failed.
  
  Error while executing '/home/tito/Android/Sdk/cmake/3.6.3155560/bin/cmake' with arguments {--build /home/tito/AndroidStudioProjects/JNItest/app/.externalNativeBuild/cmake/debug/armeabi --target native-lib}
  
  [1/2] Building CXX object CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o
  
  [2/2] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/armeabi/libnative-lib.so
  
  FAILED: : && /home/tito/Android/Sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++  -target armv5te-none-linux-androideabi -gcc-toolchain /home/tito/Android/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64 --sysroot=/home/tito/Android/Sdk/ndk-bundle/platforms/android-19/arch-arm -fPIC -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv5te -mtune=xscale -msoft-float -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv5te -mtune=xscale -msoft-float -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -frtti -fexceptions -O0 -fno-limit-debug-info -O0 -fno-limit-debug-info  -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ../../../../build/intermediates/cmake/debug/obj/armeabi/libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o  /home/tito/Android/Sdk/ndk-bundle/platforms/android-19/arch-arm/usr/lib/liblog.so ../../../../src/main/jniLibs/armeabi/libavutil-55.so ../../../../src/main/jniLibs/armeabi/libswscale-4.so ../../../../src/main/jniLibs/armeabi/libswresample-2.so ../../../../src/main/jniLibs/armeabi/libavcodec-57.so ../../../../src/main/jniLibs/armeabi/libavfilter-6.so ../../../../src/main/jniLibs/armeabi/libavformat-57.so ../../../../src/main/jniLibs/armeabi/libavdevice-57.so -lm "/home/tito/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi/libgnustl_static.a" "-latomic" && :
  
  /home/tito/AndroidStudioProjects/JNItest/app/src/main/cpp/native-lib.cpp:18: error: undefined reference to 'av_init_packet(AVPacket*)'
  
  clang++: error: linker command failed with exit code 1 (use -v to see invocation)
  
  ninja: build stopped: subcommand failed.
  
  
  
      at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:45)
  
      at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:78)
  
      at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:228)
  
      at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:221)
  
      at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:210)
  
      at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:621)
  
      at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:604)
  
      at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
  
      at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
  
      ... 70 more
  
  Caused by: Build command failed.
  
  Error while executing '/home/tito/Android/Sdk/cmake/3.6.3155560/bin/cmake' with arguments {--build /home/tito/AndroidStudioProjects/JNItest/app/.externalNativeBuild/cmake/debug/armeabi --target native-lib}
  
  [1/2] Building CXX object CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o
  
  [2/2] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/armeabi/libnative-lib.so
  
  FAILED: : && /home/tito/Android/Sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++  -target armv5te-none-linux-androideabi -gcc-toolchain /home/tito/Android/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64 --sysroot=/home/tito/Android/Sdk/ndk-bundle/platforms/android-19/arch-arm -fPIC -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv5te -mtune=xscale -msoft-float -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv5te -mtune=xscale -msoft-float -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -frtti -fexceptions -O0 -fno-limit-debug-info -O0 -fno-limit-debug-info  -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ../../../../build/intermediates/cmake/debug/obj/armeabi/libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o  /home/tito/Android/Sdk/ndk-bundle/platforms/android-19/arch-arm/usr/lib/liblog.so ../../../../src/main/jniLibs/armeabi/libavutil-55.so ../../../../src/main/jniLibs/armeabi/libswscale-4.so ../../../../src/main/jniLibs/armeabi/libswresample-2.so ../../../../src/main/jniLibs/armeabi/libavcodec-57.so ../../../../src/main/jniLibs/armeabi/libavfilter-6.so ../../../../src/main/jniLibs/armeabi/libavformat-57.so ../../../../src/main/jniLibs/armeabi/libavdevice-57.so -lm "/home/tito/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi/libgnustl_static.a" "-latomic" && :
  
  /home/tito/AndroidStudioProjects/JNItest/app/src/main/cpp/native-lib.cpp:18: error: undefined reference to 'av_init_packet(AVPacket*)'
  
  clang++: error: linker command failed with exit code 1 (use -v to see invocation)
  
  ninja: build stopped: subcommand failed.
  
  
  
      at com.android.build.gradle.tasks.ExternalNativeBuildTaskUtils.executeBuildProcessAndLogError(ExternalNativeBuildTaskUtils.java:233)
  
      at com.android.build.gradle.tasks.ExternalNativeBuildTask.executeProcessBatch(ExternalNativeBuildTask.java:231)
  
      at com.android.build.gradle.tasks.ExternalNativeBuildTask.build(ExternalNativeBuildTask.java:163)
  
      at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)
  
      ... 77 more
  
  
  
  
  
  BUILD FAILED
  
  
  
  Total time: 0.723 secs

  Can anyone tell me what I’m doing wrong here ?