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• live video streaming not playing on dash.js player using ffmpeg, nginx-rtmp in raspberry pi

  15 août 2016, par sparks

  I am trying to stream a live video from raspberry pi & pi camera module to web browser.But the video doesn’t play.I am using Nginx-rtmp and ffmpeg to process the video. On the client side i use dash js player trying to play the video but no luck.I see the warning on the terminal

  [flv @ 0x2c3b950] Failed to update header with correct duration.
[flv @ 0x2c3b950] Failed to update header with correct filesize.

  But i am not sure if this could be the issue. Anybody knows what might be wrong ?I don’t expect a straight answer but i am sure somebody can guide me in the right direction. Thank you in advance. Here is my set up

  Nginx.conf

  events {
  
    worker_connections  1024;
  
   }
  
  
  
  
  
   http     {
  
          include       mime.types;
  
          default_type  application/octet-stream;
  
  
  
  
  
  sendfile        on;
  
  
  
  keepalive_timeout  65;
  
  
  
  server {
  
      listen       80;
  
      server_name 192.168.1.114 localhost;
  
      location / {
  
          root   /var/www;
  
          index  index.html index.htm;
  
      }
  
  
  
  
  
      location /dash {
  
          root /var/www;
  
          add_header Cache-Control no-cache;
  
      }
  
  
  
       location /dash.js{
  
          root /var/www;
  
        }
  
  
  
       location /hls {
  
         types {
  
          application/vnd.apple.mpegurl m3u8;
  
          video/mp2t ts;
  
        }
  
  
  
        root /var/www;
  
        index index.html;
  
        add_header Cache-Control no-cache;
  
      }
  
  
  
      location /rtmpcontrol{
  
          rtmp_control all;
  
       }
  
  
  
      location /rtmpstat{
  
          rtmp_stat all;
  
       }
  
  
  
      #error_page  404              /404.html;
  
  
  
  
  
             error_page   500 502 503 504  /50x.html;
  
      location = /50x.html {
  
          root   html;
  
      }
  
  
  
         }
  
   rtmp {
  
     server {
  
      listen 1935;
  
  
  
      chunk_size 4000;
  
  
  
      application rtmp {
  
          live on;
  
          hls on;
  
          dash on;
  
          dash_path /var/www/dash;
  
          hls_path /var/www/hls;
  
      }
  
    }
  
  }

  baseline.html

      
  
      
  
      
  
      
  
  
  
      
  
      
  
  
  
      
  
      
  
  
  
      
  
      <code class="echappe-js">&lt;script src='http://stackoverflow.com/feeds/tag/dash.all.js'&gt;&lt;/script&gt;
  &lt;script&gt;<br />
  
          function getUrlVars() {<br />
  
              var vars = {};<br />
  
              var parts = window.location.href.replace(/[?&amp;amp;]+([^=&amp;amp;]+)=([^&amp;amp;]*)/gi, function(m,key,value) {<br />
  
                  vars[key] = value;<br />
  
              });<br />
  
              return vars;<br />
  
          }<br />
  
  <br />
  
          function startVideo() {<br />
  
              var vars = getUrlVars(),<br />
  
                  url = &quot;http://192.168.1.114:80/dash/stream.mpd&quot;,<br />
  
                  video,<br />
  
                  context,<br />
  
                  player;<br />
  
  <br />
  
              if (vars &amp;amp;&amp;amp; vars.hasOwnProperty(&quot;url&quot;)) {<br />
  
                  url = vars.url;<br />
  
              }<br />
  
  <br />
  
              video = document.querySelector(&quot;.dash-video-player video&quot;);<br />
  
              context = new Dash.di.DashContext();<br />
  
              player = new MediaPlayer(context);<br />
  
  <br />
  
              player.startup();<br />
  
  <br />
  
              player.attachView(video);<br />
  
              player.setAutoPlay(false);<br />
  
  <br />
  
              player.attachSource(url);<br />
  
          }<br />
  
      &lt;/script&gt;
      &lt;body onload=&quot;startVideo()&quot;&gt;
  
              
          
  

  How i grab and push video stream

   raspivid -w 640 -h 480 -fps 25 -t 0 -b 1800000 -o - | ffmpeg -y -f h264 -i - -vcodec libx264  -f flv -rtmp_buffer 100 -rtmp_live live rtmp://localhost:1935/rtmp/stream

  When i run the above command, i see the following on the terminal

      ffmpeg version N-81256-gd3426fb Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.9.2 (Raspbian 4.9.2-10)
  
    configuration: --enable-gpl --enable-libx264 --enable-nonfree
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 51.100 / 57. 51.100
  
    libavformat    57. 44.100 / 57. 44.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 49.100 /  6. 49.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, h264, from 'pipe:':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuv420p, 640x480, 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  [tcp @ 0x2c3c850] Connection to tcp://localhost:1935 failed (Connection refused), trying next address
  
  [libx264 @ 0x2c50d80] using cpu capabilities: ARMv6 NEON
  
  [libx264 @ 0x2c50d80] profile High, level 3.0
  
  [libx264 @ 0x2c50d80] 264 - core 148 r2705 3f5ed56 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [flv @ 0x2c3b950] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Output #0, flv, to 'rtmp://localhost:1935/rtmp/stream':
  
    Metadata:
  
      encoder         : Lavf57.44.100
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 640x480, q=-1--1, 25 fps, 1k tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc57.51.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  ^Cmmal: Aborting program.0 size=     930kB time=00:00:45.44 bitrate= 167.7kbits/s speed=1.03x     
  
  
  
  [flv @ 0x2c3b950] Failed to update header with correct duration.
  
  [flv @ 0x2c3b950] Failed to update header with correct filesize.
  
  frame= 1197 fps= 26 q=-1.0 Lsize=     976kB time=00:00:47.76 bitrate= 167.5kbits/s speed=1.04x    
  
  video:953kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.484349%
  
  [libx264 @ 0x2c50d80] frame I:5     Avg QP:18.91  size:  3600
  
  [libx264 @ 0x2c50d80] frame P:299   Avg QP:21.38  size:  1486
  
  [libx264 @ 0x2c50d80] frame B:893   Avg QP:20.62  size:   574
  
  [libx264 @ 0x2c50d80] consecutive B-frames:  0.4%  0.0%  1.0% 98.6%
  
  [libx264 @ 0x2c50d80] mb I  I16..4: 10.1% 87.1%  2.8%
  
  [libx264 @ 0x2c50d80] mb P  I16..4:  3.8%  7.4%  0.0%  P16..4: 34.2%  2.1%  1.5%  0.0%  0.0%    skip:51.0%
  
  [libx264 @ 0x2c50d80] mb B  I16..4:  0.2%  0.3%  0.0%  B16..8: 20.1%  0.4%  0.0%  direct: 3.8%  skip:75.1%  L0:48.6% L1:50.9% BI: 0.6%
  
  [libx264 @ 0x2c50d80] 8x8 transform intra:68.1% inter:97.0%
  
  [libx264 @ 0x2c50d80] coded y,uvDC,uvAC intra: 10.1% 27.5% 1.8% inter: 2.0% 12.9% 0.1%
  
  [libx264 @ 0x2c50d80] i16 v,h,dc,p: 18% 20%  9% 53%
  
  [libx264 @ 0x2c50d80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 11% 58%  2%  2%  1%  2%  1%  1%
  
  [libx264 @ 0x2c50d80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 26% 30%  3%  4%  4%  6%  2%  2%
  
  [libx264 @ 0x2c50d80] i8c dc,h,v,p: 66% 18% 15%  1%
  
  [libx264 @ 0x2c50d80] Weighted P-Frames: Y:1.7% UV:1.3%
  
  [libx264 @ 0x2c50d80] ref P L0: 58.2%  2.2% 25.5% 14.1%  0.1%
  
  [libx264 @ 0x2c50d80] ref B L0: 81.7% 13.3%  5.0%
  
  [libx264 @ 0x2c50d80] ref B L1: 93.6%  6.4%
  
  [libx264 @ 0x2c50d80] kb/s:162.87
  
  Exiting normally, received signal 2.

  On my var/www/dash directory

   stream-0.m4a  stream-19200.m4a  stream-29200.m4a  
  
   stream-9600.m4a    stream-init.m4a  stream.mpd      stream-raw.m4v
  
   stream-0.m4v  stream-19200.m4v  stream-29200.m4v  stream-9600.m4v    stream-init.m4v  stream-raw.m4a

• Python to generate a video mpd file (even a node package) [on hold]

  14 mars 2017, par Junior

  I am in the midst of developing a video streaming app and I’m currently stuck at the Adaptive Bitrate Streaming part.

  Is there a python or node module that can (run server-side and) generate a mpd file of a video after it is uploaded, this way it is easy to link the file to Dash.js.

  So to clarify, I would just upload my video and have the server generate an mpd file for the video. The next time I use Dash.js, i just attach this file.

  Thanks.

• 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 ?