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  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • La sauvegarde automatique de canaux SPIP

    1er avril 2010, par

    Dans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
    Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 est la première version de MediaSPIP stable.
    Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

Sur d’autres sites (7680)

  • lavf/img2 : Move "loop" into common options.

    10 février 2019, par Carl Eugen Hoyos
    lavf/img2 : Move "loop" into common options.

    While the image2pipe demuxer ignores the option - confusing users -
    
the autodetecting demuxers that are favoured over image2 act on it.
    • [DH] libavformat/img2dec.c

  • Opencv VideoCapture not streaming RTSP link and returns "no frame !"

    6 septembre 2023, par Asadullah Naeem

    I am trying to stream my HikVision IP camera throough python. I am using cv2.VideoCapture("rtsp_link") which works fine on my Laptop but when I try to run the same python script with same Opencv and FFmpeg version it gives me following error :

    


    Error :

    


    [h264 @ 000002124c7f9a40] missing picture in access unit with size 47
[h264 @ 000002124c7f9a40] no frame!


    


    I have so far tried to run this script on 5 computer devices but it gives the same error. I am using the following python script and my Opencv version is 4.6.0.66 and ffmpeg version 2022-06-20-git-56419428a8-essentials_build-www.gyan.dev :

    


    Python Script :

    


    import cv2

# RTSP stream URL
rtsp_url = "rtsp://username:password@ip_address:port/Streaming/Channels/501"

# Open the RTSP stream
cap = cv2.VideoCapture(rtsp_url)

# Check if the stream was successfully opened
if not cap.isOpened():
    print("Failed to open RTSP stream.")
    exit()

# Read and display frames from the stream
while True:
    # Read a frame from the stream
    ret, frame = cap.read()

    # Check if the frame was successfully read
    if not ret:
        print("Failed to read frame from RTSP stream.")
        break

    # Display the frame
    cv2.imshow("RTSP Stream", frame)

    # Exit if 'q' is pressed
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# Release the resources
cap.release()
cv2.destroyAllWindows()



    


    Update :

    


    Code runs on a laptop on both wifi and mobile internet (4G) but on other devices rtsp link is accessible only with mobile internet (4G).

    


  • 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: : &amp;&amp; /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" &amp;&amp; :
    
  /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: : &amp;&amp; /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" &amp;&amp; :
    
/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: : &amp;&amp; /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" &amp;&amp; :
    
/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 ?

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