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• Android ffmpeg. Linker command failed with exit code 1

  8 juin 2017, par Wilsom Sanders

  I’m trying to build ffmpeg static libraries and link them to an android project in order to implement a video player. Goal is to make a player capable of receiving video file from various sources similar to p2p file sharing networks. (target api is 21 level which is 1 level short from supposed official solution with MediaSource)

  I managed to compile ffmpeg from this repo (all the code used as-is) but later i got stuck on a linking problem. Whenever I try to compile I get list of ffmpeg methods called in my code and a short eloquent message :

  Linker command failed with exit code 1

  I have no clue how to pass -v flag to the linker in android studio. Would be great if somebody hinted me that.

  I use android studio, build with gradle and cmake.

  There’s my files :
  build.gradle (Project)

  // Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  
  
  buildscript {
  
      repositories {
  
          jcenter()
  
      }
  
      dependencies {
  
          classpath 'com.android.tools.build:gradle:2.3.1'
  
  
  
          // NOTE: Do not place your application dependencies here; they belong
  
          // in the individual module build.gradle files
  
      }
  
  }
  
  
  
  allprojects {
  
      repositories {
  
          jcenter()
  
      }
  
  }
  
  
  
  task clean(type: Delete) {
  
      delete rootProject.buildDir
  
  }

  build.gradle (Module)

  apply plugin: 'com.android.application'
  
  
  
      android {
  
          compileSdkVersion 25
  
          buildToolsVersion "25.0.3"
  
          productFlavors {
  
              x86 {
  
                  ndk {
  
                      abiFilter "x86"
  
                  }
  
              }
  
              arm {
  
                  ndk {
  
                      abiFilters "armeabi-v7a"
  
                  }
  
              }
  
              armv7 {
  
                  ndk {
  
                      abiFilters "armeabi-v7a"
  
                  }
  
              }
  
          }
  
          defaultConfig {
  
              applicationId "com.example.ledo.ndkapplication"
  
              minSdkVersion 22
  
              targetSdkVersion 25
  
              versionCode 1
  
              versionName "1.0"
  
              testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  
              externalNativeBuild {
  
                  cmake {
  
                      cppFlags "-std=c++11 -frtti -fexceptions"
  
                      arguments '-DANDROID_PLATFORM=android-16'
  
                  }
  
              }
  
          }
  
          buildTypes {
  
              release {
  
                  minifyEnabled false
  
                  proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
              }
  
          }
  
          externalNativeBuild {
  
              cmake {
  
                  path "CMakeLists.txt"
  
              }
  
          }
  
          splits {
  
              abi {
  
                  enable true
  
                  reset()
  
                  include 'x86', 'armeabi-v7a'
  
                  universalApk true
  
              }
  
          }
  
      }
  
  
  
      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-v7:25.3.1'
  
          compile 'com.android.support.constraint:constraint-layout:1.0.2'
  
          compile 'com.android.support:design:25.3.1'
  
          compile 'com.writingminds:FFmpegAndroid:0.3.2'
  
          testCompile 'junit:junit:4.12'
  
      }

  CMakeLists.txt

  # For more information about using CMake with Android Studio, read the
  
  # documentation: https://d.android.com/studio/projects/add-native-code.html
  
  
  
  # Sets the minimum version of CMake required to build the native library.
  
  
  
  cmake_minimum_required(VERSION 2.8)
  
  
  
  # Creates and names a library, sets it as either STATIC
  
  # or SHARED, and provides the relative paths to its source code.
  
  # You can define multiple libraries, and CMake builds them for you.
  
  # Gradle automatically packages shared libraries with your APK.
  
  
  
  add_library( # Sets the name of the library.
  
               native-lib
  
  
  
               # Sets the library as a shared library.
  
               SHARED
  
  
  
               # Provides a relative path to your source file(s).
  
               src/main/cpp/native-lib.cpp
  
               src/main/cpp/NativePlayer.h
  
               src/main/cpp/NativePlayer.cpp)
  
  
  
  # Searches for a specified prebuilt library and stores the path as a
  
  # variable. Because CMake includes system libraries in the search path by
  
  # default, you only need to specify the name of the public NDK library
  
  # you want to add. CMake verifies that the library exists before
  
  # completing its build.
  
  
  
  find_library( # Sets the name of the path variable.
  
                log-lib
  
  
  
                # Specifies the name of the NDK library that
  
                # you want CMake to locate.
  
                log )
  
  find_library(png-lib png)
  
  
  
  # Specifies libraries CMake should link to your target library. You
  
  # can link multiple libraries, such as libraries you define in this
  
  # build script, prebuilt third-party libraries, or system libraries.
  
  
  
  #avcodec
  
  #avfilter
  
  #avformat
  
  #avutil
  
  #swresample
  
  #swscale
  
  
  
  #${ANDROID_ABI}
  
  
  
  message(${ANDROID_ABI})
  
  set(FFMPEG_ROOT_DIR src/main/libs/ffmpeg/${ANDROID_ABI})
  
  
  
  add_library(avcodec STATIC IMPORTED)
  
  add_library(avformat STATIC IMPORTED)
  
  add_library(avfilter STATIC IMPORTED)
  
  add_library(avutil STATIC IMPORTED)
  
  add_library(swresample STATIC IMPORTED)
  
  add_library(swscale STATIC IMPORTED)
  
  
  
  #SET_TARGET_PROPERTIES(avcodec PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavcodec.a)
  
  #SET_TARGET_PROPERTIES(avfilter PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavfilter.a)
  
  #SET_TARGET_PROPERTIES(avformat PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavformat.a)
  
  #SET_TARGET_PROPERTIES(avutil PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavutil.a)
  
  #SET_TARGET_PROPERTIES(swresample PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswresample.a)
  
  #SET_TARGET_PROPERTIES(swscale PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswscale.a)
  
  
  
  include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/include )
  
  include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib )
  
  target_link_libraries( # Specifies the target library.
  
                         native-lib
  
  
  
                         # Links the target library to the log library
  
                         # included in the NDK.
  
                         ${log-lib}
  
                         avcodec
  
                         avformat
  
                         #avfilter
  
                         #swresample
  
                         #swscale
  
                         #avutil
  
                         GLESv2)

  I have .a files in following locations :
  %PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a
  %PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a-neon
  %PROJECT_DIR%/app/src/libs/ffmpeg/x86

  It doesn’t look to me that linker misses files themselves. (I get different out put if I misplace them.)

• Compile Shotdetect on CentOS 7

  14 septembre 2015, par BitLegacy01

  I’m migrating a service from a Debian server to a CentOS 7 one.

  The service needs the Shotdetect command (github , official site).

  I could not make it work on CentOS though I followed all steps :

  1. Compile ffmpeg compilation guide

     # ffmpeg
     
     ffmpeg version git-2015-08-21-7a806c6 Copyright (c) 2000-2015 the FFmpeg developers
     
       built with gcc 4.8.3 (GCC) 20140911 (Red Hat 4.8.3-9)
     
       configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --disable-libmp3lame --disable-libopus --disable-libvorbis --disable-libvpx --enable-libx264 --disable-libx265 --disable-lzma
     
       libavutil      54. 31.100 / 54. 31.100
     
       libavcodec     56. 58.100 / 56. 58.100
     
       libavformat    56. 40.101 / 56. 40.101
     
       libavdevice    56.  4.100 / 56.  4.100
     
       libavfilter     5. 36.100 /  5. 36.100
     
       libswscale      3.  1.101 /  3.  1.101
     
       libswresample   1.  2.101 /  1.  2.101
     
       libpostproc    53.  3.100 / 53.  3.100
     
     Hyper fast Audio and Video encoder
     
     usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

     2. Install needed packages

        # yum install gd-devel libxml2-devel libxslt-devel clang libvpx libvorbis

     3. Add pthread in the CMakeList file, in TARGET_LINK_LIBRARIES, because it throws an lpthread missing in linker error

     4. Compile Shotdetect

        # FFMPEG_DIR="/root/ffmpeg_build"  ./compile.sh cmd

  5.Lost in contemplation

  -- avformat library found: /root/ffmpeg_build/lib/libavformat.a
  
  -- avcodec library found: /root/ffmpeg_build/lib/libavcodec.a
  
  -- avutil library found: /root/ffmpeg_build/lib/libavutil.a
  
  -- swscale library found: /root/ffmpeg_build/lib/libswscale.a
  
  Found all FFmpeg libraries in /root/ffmpeg_build/lib/libavformat.a;/root/ffmpeg_build/lib/libavdevice.a;/root/ffmpeg_build/lib/libavcodec.a;/root/ffmpeg_build/lib/libavutil.a;/root/ffmpeg_build/lib/libswscale.a.
  
  -- Found GD: /usr/lib64/libgd.so
  
  Found libgd: /usr/lib64/libgd.so;/usr/lib64/libpng.so;/usr/lib64/libz.so;/usr/lib64/libjpeg.so in /usr/include
  
  Found libxml2: /usr/lib64/libxml2.so in /usr/include/libxml2
  
  Found libxslt: /usr/lib64/libxslt.so in /usr/include
  
  -- Configuring done
  
  -- Generating done
  
  -- Build files have been written to: /root/Shotdetect-master/build
  
  [ 71%] Built target shotdetect
  
  Linking CXX executable shotdetect-cmd
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_frame »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:323: undefined reference to « aacDecoder_Fill »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:329: undefined reference to « aacDecoder_DecodeFrame »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « get_stream_info »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:88: undefined reference to « aacDecoder_GetStreamInfo »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_close »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:201: undefined reference to « aacDecoder_Close »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_init »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:214: undefined reference to « aacDecoder_Open »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:221: undefined reference to « aacDecoder_ConfigRaw »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:228: undefined reference to « aacDecoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:252: undefined reference to « aacDecoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:270: undefined reference to « aacDecoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:277: undefined reference to « aacDecoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:284: undefined reference to « aacDecoder_SetParam »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o):/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:291: encore plus de références indéfinies suivent vers « aacDecoder_SetParam »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_init »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:261: undefined reference to « aacDecoder_AncDataInit »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacdec.o): in the function « fdk_aac_decode_flush »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacdec.c:367: undefined reference to « aacDecoder_SetParam »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_close »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:97: undefined reference to « aacEncClose »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_frame »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:357: undefined reference to « aacEncEncode »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_init »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:114: undefined reference to « aacEncOpen »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:123: undefined reference to « aacEncoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:130: undefined reference to « aacEncoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:138: undefined reference to « aacEncoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:172: undefined reference to « aacEncoder_SetParam »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:179: undefined reference to « aacEncoder_SetParam »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o):/root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:197: encore plus de références indéfinies suivent vers « aacEncoder_SetParam »
  
  /root/ffmpeg_build/lib/libavcodec.a(libfdk-aacenc.o): in the function « aac_encode_init »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:276: undefined reference to « aacEncEncode »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libfdk-aacenc.c:282: undefined reference to « aacEncInfo »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_frame »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:260: undefined reference to « x264_picture_init »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:262: undefined reference to « x264_bit_depth »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « reconfig_encoder »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:246: undefined reference to « x264_encoder_reconfig »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_frame »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:283: undefined reference to « x264_encoder_encode »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:289: undefined reference to « x264_encoder_delayed_frames »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:283: undefined reference to « x264_encoder_encode »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « reconfig_encoder »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:173: undefined reference to « x264_encoder_reconfig »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:178: undefined reference to « x264_encoder_reconfig »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:185: undefined reference to « x264_encoder_reconfig »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:205: undefined reference to « x264_encoder_reconfig »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:211: undefined reference to « x264_encoder_reconfig »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o):/root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:191: encore plus de références indéfinies suivent vers « x264_encoder_reconfig »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_init_static »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:806: undefined reference to « x264_bit_depth »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_close »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:339: undefined reference to « x264_encoder_close »
  
  /root/ffmpeg_build/lib/libavcodec.a(libx264.o): in the function « X264_init »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:413: undefined reference to « x264_param_default »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:418: undefined reference to « x264_param_default_preset »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:440: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:470: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:514: undefined reference to « x264_levels »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:516: undefined reference to « x264_levels »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:540: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:541: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:542: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:543: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:601: undefined reference to « x264_param_apply_fastfirstpass »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:651: undefined reference to « x264_param_apply_profile »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:703: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:705: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:717: undefined reference to « x264_param_parse »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:735: undefined reference to « x264_encoder_open_148 »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/libx264.c:744: undefined reference to « x264_encoder_headers »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_subpacket »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:379: undefined reference to « swr_is_initialized »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_frame »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:220: undefined reference to « swr_is_initialized »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_init_resample »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:161: undefined reference to « swr_init »
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:167: undefined reference to « swr_convert »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_frame »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:234: undefined reference to « swr_convert »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_flush_resample »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:115: undefined reference to « swr_convert »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_subpacket »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:411: undefined reference to « swr_close »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_flush »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:614: undefined reference to « swr_close »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_close »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:638: undefined reference to « swr_free »
  
  /root/ffmpeg_build/lib/libavcodec.a(opusdec.o): in the function « opus_decode_init »:
  
  /root/ffmpeg_sources/ffmpeg/libavcodec/opusdec.c:705: undefined reference to « swr_alloc »
  
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  
  make[2]: *** [shotdetect-cmd] Error 1
  
  make[1]: *** [CMakeFiles/shotdetect-cmd.dir/all] Error 2
  
  make: *** [all] Error 2

  I’ve done a lot of research about the above errors but I didn’t find any clue.

  How to compile successfully Shotdetect on CentOS7 ?

  Thanks to tryp here is a working CMakelist file :

  # CMake integration by Christian Frisson
  
  cmake_minimum_required(VERSION 2.8)
  
  PROJECT(shotdetect)
  
  
  
  SET(CMAKE_C_COMPILER "/usr/bin/clang")
  
  SET(CMAKE_CXX_COMPILER "/usr/bin/clang++")
  
  SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
  
  
  
  
  
  # Get git version information for automatic embedding in version string:
  
  
  
  include(GetGitRevisionDescription)
  
  get_git_head_revision(GIT_REFSPEC GIT_SHA1)
  
  # Take the first 12 characters of the SHA1 as short identifier:
  
  STRING(SUBSTRING ${GIT_SHA1} 0 11 GIT_SHA1_SHORT)
  
  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/src/version.cc.in" "${CMAKE_CURRENT_BINARY_DIR}/version.cc" @ONLY)
  
  list(APPEND SOURCES "${CMAKE_CURRENT_BINARY_DIR}/version.cc" src/version.h)
  
  
  
  # Miscellaneous compilation options:
  
  
  
  OPTION(USE_WXWIDGETS "Compile GUI app with wxWidgets, otherwise commandline app" ON)
  
  OPTION(USE_POSTGRESQL "Compile with PostgreSQL support" OFF)
  
  
  
  # Dependency: pkg-config (required if cross-compiling with MXE)
  
  
  
  IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
  
      FIND_PACKAGE (PkgConfig)
  
      IF(NOT PKG_CONFIG_FOUND)
  
          MESSAGE(FATAL_ERROR "pkgconfig required for cross-compiling with MXE for windows")
  
      ENDIF()
  
      SET(PKG_CONFIG_EXECUTABLE ${PKG_CONFIG_EXECUTABLE} CACHE STRING "pkg-config")
  
  ENDIF()
  
  
  
  # Dependency: FFmpeg (required)
  
  
  
  FIND_PACKAGE( FFmpeg )
  
  IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
  
      PKG_CHECK_MODULES (FFMPEG_PKG REQUIRED libavcodec libavfilter libavutil libavdevice libavformat libavformat libswscale)
  
      IF (FFMPEG_PKG_FOUND)
  
          MESSAGE( "FFmpeg cflags found through pkg-config: ${FFMPEG_PKG_CFLAGS}" )
  
          MESSAGE( "FFmpeg ldflags found through pkg-config: ${FFMPEG_PKG_LDFLAGS}" )
  
          STRING(REGEX REPLACE ";" " " FFMPEG_PKG_CFLAGS "${FFMPEG_PKG_CFLAGS}")
  
          SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FFMPEG_PKG_CFLAGS}")
  
          SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${FFMPEG_PKG_CFLAGS}")
  
          SET(FFMPEG_LIBRARIES ${FFMPEG_LIBRARY} ${FFMPEG_PKG_LDFLAGS})
  
          MESSAGE("FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES}")
  
      ELSE (FFMPEG_PKG_FOUND)
  
          MESSAGE( FATAL_ERROR "FFmpeg cflags/ldflags not found through pkg-config." )
  
      ENDIF (FFMPEG_PKG_FOUND)
  
  ENDIF()
  
  IF(FFMPEG_LIBAVFORMAT_FOUND)
  
      MESSAGE(STATUS "avformat library found: ${FFMPEG_LIBAVFORMAT_LIBRARIES}")
  
  ELSE()
  
      MESSAGE(STATUS "avformat library not found.")
  
  ENDIF()
  
  IF(FFMPEG_LIBAVCODEC_FOUND)
  
      MESSAGE(STATUS "avcodec library found: ${FFMPEG_LIBAVCODEC_LIBRARIES}")
  
  ELSE()
  
      MESSAGE(STATUS "avcodec library not found.")
  
  ENDIF()
  
  IF(FFMPEG_LIBAVUTIL_FOUND)
  
      MESSAGE(STATUS "avutil library found: ${FFMPEG_LIBAVUTIL_LIBRARIES}")
  
  ELSE()
  
      MESSAGE(STATUS "avutil library not found.")
  
  ENDIF()
  
  IF(FFMPEG_LIBSWSCALE_FOUND)
  
      MESSAGE(STATUS "swscale library found: ${FFMPEG_LIBSWSCALE_LIBRARIES}")
  
  ELSE()
  
      MESSAGE(STATUS "swscale library not found.")
  
  ENDIF()
  
  IF(FFMPEG_FOUND)
  
      INCLUDE_DIRECTORIES(${FFMPEG_INCLUDE_DIR} ${FFMPEG_INCLUDE_DIRS})
  
      SET(FFMPEG_LIBRARIES "${FFMPEG_LIBRARIES};/root/ffmpeg_build/lib/libswresample.a;/root/ffmpeg_build/lib/libx264.a;/lib64/libdl.so.2;/root/ffmpeg_build/lib/libfdk-aac.a;/root/ffmpeg_build/lib/libswresample.a")
  
      MESSAGE("Found all FFmpeg libraries in ${FFMPEG_LIBRARIES}.")
  
  ELSE()
  
      MESSAGE(FATAL_ERROR "Some FFmpeg libraries are missing.")
  
  ENDIF()
  
  
  
  # Dependency: GD (required)
  
  
  
  FIND_PACKAGE(GD REQUIRED)
  
  IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
  
      EXEC_PROGRAM(${CMAKE_FIND_ROOT_PATH}/bin/gdlib-config ARGS "--cflags" OUTPUT_VARIABLE GD_PKG_CFLAGS) 
  
      EXEC_PROGRAM(${CMAKE_FIND_ROOT_PATH}/bin/gdlib-config ARGS "--libs" OUTPUT_VARIABLE GD_PKG_LDFLAGS)
  
      MESSAGE( "gd cflags found through gdlib-config: ${GD_PKG_CFLAGS}" )
  
      MESSAGE( "gd ldflags found through gdlib-config: ${GD_PKG_LDFLAGS}" )
  
      SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GD_PKG_CFLAGS}")
  
      SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GD_PKG_CFLAGS}")
  
      SET(GD_LIBRARIES ${GD_LIBRARY} ${GD_PKG_LDFLAGS})
  
      MESSAGE("GD_LIBRARIES ${GD_LIBRARIES}")
  
  ENDIF()
  
  IF(GD_FOUND)
  
      INCLUDE_DIRECTORIES(${GD_INCLUDE_DIR})
  
      MESSAGE("Found libgd: ${GD_LIBRARIES} in ${GD_INCLUDE_DIR}")
  
  ELSE()
  
      MESSAGE(FATAL_ERROR "Couldn't find libgd")
  
  ENDIF()
  
  
  
  # Dependency: libxml2 (required)
  
  
  
  FIND_PACKAGE(LibXml2 2.7 REQUIRED)
  
  IF ( MINGW AND CMAKE_TOOLCHAIN_FILE)
  
      PKG_CHECK_MODULES (LIBXML2_PKG REQUIRED libxml-2.0)
  
      IF (LIBXML2_PKG_FOUND)
  
          MESSAGE( "LibXml2 cflags found through pkg-config: ${LIBXML2_PKG_CFLAGS}" )
  
          MESSAGE( "LibXml2 ldflags found through pkg-config: ${LIBXML2_PKG_LDFLAGS}" )
  
          STRING(REGEX REPLACE ";" " " LIBXML2_PKG_CFLAGS "${LIBXML2_PKG_CFLAGS}")
  
          SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBXML2_PKG_CFLAGS}")
  
          SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBXML2_PKG_CFLAGS}")
  
          SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARY} ${LIBXML2_PKG_LDFLAGS})
  
          MESSAGE("LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES}")
  
      ELSE (LIBXML2_PKG_FOUND)
  
          MESSAGE( FATAL_ERROR "LibXml2 cflags/ldflags not found through pkg-config." )
  
      ENDIF (LIBXML2_PKG_FOUND)
  
  ENDIF()
  
  IF(LIBXML2_FOUND)
  
      MESSAGE("Found libxml2: ${LIBXML2_LIBRARIES} in ${LIBXML2_INCLUDE_DIR}")
  
      INCLUDE_DIRECTORIES(${LIBXML2_INCLUDE_DIR})
  
  ELSE()
  
      MESSAGE(FATAL_ERROR "Couldn't find libxml2")
  
  ENDIF()
  
  
  
  # Dependency: libxslt (required)
  
  
  
  FIND_PACKAGE(LibXslt REQUIRED)
  
  IF(LIBXSLT_FOUND)
  
      MESSAGE("Found libxslt: ${LIBXSLT_LIBRARIES} in ${LIBXSLT_INCLUDE_DIR}")
  
      INCLUDE_DIRECTORIES(${LIBXSLT_INCLUDE_DIR})
  
  ELSE()
  
      MESSAGE(FATAL_ERROR "Couldn't find libxslt")
  
  ENDIF()
  
  
  
  # Dependency: wxWidgets (optional)
  
  IF(USE_WXWIDGETS)
  
      FIND_PACKAGE(wxWidgets)# COMPONENTS core base)
  
      IF(wxWidgets_FOUND)
  
          MESSAGE("Found wxWidgets: ${wxWidgets_LIBRARIES} in ${wxWidgets_INCLUDE_DIRS}")
  
          INCLUDE_DIRECTORIES(${wxWidgets_INCLUDE_DIRS})
  
          ADD_DEFINITIONS(-DWXWIDGETS)
  
          INCLUDE("${wxWidgets_USE_FILE}")
  
      ELSE()
  
          MESSAGE(FATAL_ERROR "Couldn't find wxWidgets. Set USE_WXWIDGETS to OFF or install wxWidgets.")
  
      ENDIF()
  
  ENDIF()
  
  
  
  # Dependency: PostgreSQL (optional)
  
  IF(USE_POSTGRESQL)
  
      FIND_PACKAGE(PostgreSQL)
  
      IF(PostgreSQL_FOUND)
  
          MESSAGE("Found PostgreSQL: ${PostgreSQL_LIBRARIES} in ${PostgreSQL_INCLUDE_DIR}")
  
          INCLUDE_DIRECTORIES(${PostgreSQL_INCLUDE_DIR})
  
      ELSE()
  
          MESSAGE(FATAL_ERROR "Couldn't find PostgreSQL. Set USE_POSTGRESQL to OFF or install PostgreSQL.")
  
      ENDIF()
  
  ENDIF()
  
  
  
  # shotdetect
  
  
  
  SET(TARGET_NAME "shotdetect")
  
  INCLUDE_DIRECTORIES(.)
  
  
  
  # shotdetect library
  
  
  
  SET(${TARGET_NAME}_LIBRARY_SRCS src/film.cc src/graph.cc src/image.cc src/shot.cc src/xml.cc)
  
  SET(${TARGET_NAME}_LIBRARY_HDRS  src/film.h src/graph.h src/image.h src/shot.h src/xml.h)
  
  IF(USE_POSTGRESQL)
  
      SET(${TARGET_NAME}_LIBRARY_SRCS ${${TARGET_NAME}_LIBRARY_SRCS} src/bdd.cc)
  
      SET(${TARGET_NAME}_LIBRARY_HDRS ${${TARGET_NAME}_LIBRARY_HDRS} src/bdd.h)
  
  ENDIF()
  
  ADD_LIBRARY(${TARGET_NAME} ${${TARGET_NAME}_LIBRARY_SRCS} ${${TARGET_NAME}_LIBRARY_HDRS})
  
  TARGET_LINK_LIBRARIES(${TARGET_NAME} ${FFMPEG_LIBRARIES} ${LIBXML2_LIBRARIES} ${LIBXSLT_LIBRARIES} ${GD_LIBRARIES} "pthread" "m" "z")
  
  IF(USE_WXWIDGETS AND wxWidgets_FOUND)
  
      TARGET_LINK_LIBRARIES(${TARGET_NAME} ${wxWidgets_LIBRARIES})
  
  ENDIF()
  
  IF(USE_POSTGRESQL AND PostgreSQL_FOUND)
  
      TARGET_LINK_LIBRARIES(${TARGET_NAME} ${PostgreSQL_LIBRARY})
  
  ENDIF()
  
  
  
  # shotdetect application: gui or commandline
  
  
  
  IF(APPLE)
  
      SET(APP_TYPE "MACOSX_BUNDLE")
  
  ELSEIF(WIN32)
  
      SET(APP_TYPE "WIN32")
  
  ENDIF()
  
  
  
  IF(USE_WXWIDGETS AND wxWidgets_FOUND)
  
      LIST(APPEND ${TARGET_NAME}_GUI_SRCS src/main.cc src/ui/dialog_help.cc src/ui/dialog_shotdetect.cc src/ui/process_video_thread.cc)
  
      LIST(APPEND ${TARGET_NAME}_GUI_HDRS src/ui/dialog_help.h src/ui/dialog_shotdetect.h src/ui/process_video_thread.h)
  
      ADD_EXECUTABLE(${TARGET_NAME}-gui ${APP_TYPE} ${SOURCES} ${${TARGET_NAME}_GUI_SRCS} ${${TARGET_NAME}_GUI_HDRS})
  
      TARGET_LINK_LIBRARIES(${TARGET_NAME}-gui ${TARGET_NAME})
  
      # Make this target optional to install:
  
      SET(TARGETS_TO_INSTALL ${TARGET_NAME}-gui)
  
  ELSE()
  
      LIST(APPEND ${TARGET_NAME}_COMMANDLINE_SRCS src/commandline.cc)
  
      ADD_EXECUTABLE(${TARGET_NAME}-cmd ${SOURCES} ${${TARGET_NAME}_COMMANDLINE_SRCS})
  
      TARGET_LINK_LIBRARIES(${TARGET_NAME}-cmd ${TARGET_NAME})
  
      # Make this target optional to install:
  
      SET(TARGETS_TO_INSTALL ${TARGET_NAME}-cmd)
  
  ENDIF()
  
  
  
  
  
  # Routines for installing shotdetect.
  
  # Taken from official documentation (http://www.cmake.org/cmake/help/cmake2.6docs.html#command:install)
  
  install( 
  
      TARGETS ${TARGETS_TO_INSTALL}
  
      RUNTIME DESTINATION bin
  
      LIBRARY DESTINATION lib
  
      ARCHIVE DESTINATION lib/static
  
  )

  the built binary will be in the built directory, you can move there and execute

  make install

  to make the binary system wide.

• Piwik 2.1 — Massive Performance and Reliability Improvements

  4 mars 2014, par Benaka M. — Community, Development

  We are very excited to announce the immediate availability of Piwik v2.1.0 !

  • Download Link
  • How to update Piwik ?
  • List of all tickets closed : Changelog

  Piwik 2.1 is the first release after our 2.0 release and it reflects the new direction Piwik is moving in : better performance, more reliability and a better overall open platform ! We also released more plugins on the marketplace as well as helped developers build exciting new plugins for Piwik.

  This 2.1.0 release contains several performance and reliability improvements to the archiving process and to the new device detection process introduced in Piwik 2.0. It also includes a new email report format (CSV), a new marketplace plugin and overall more than 80 improvements (source).

  Massive Performance Improvements to Archiving

  The biggest improvement this release brings to Piwik are the various performance improvements made to the Archiving Process. These improvements include the following :

  • The amount of memory used has been reduced in some cases by 80% or more ! What used to require 8GB of memory will now only require 1GB. Piwik engineers analysed Profiler XHProf reports of Piwik under high load and implemented several improvements to archiving.
  • The cron script you can setup to automatically process your reports will now create new processes to perform asynchronous archiving instead issuing CURL http requests. This change results in increases to the performance and reliability of the Archiving Process.

  Bug Fixes and Performance Improvements to Device Detection

  In Piwik 1.12 we introduced a new device detection feature that could detect much more information than what we used before. Piwik 2.1 includes several bug fixes and improvements to this feature (such as detecting dozens of new devices, brands and models for smartphones, tablets and other devices). To use this feature, go to “Settings” then “Plugins” then activate the DevicesDetection plugin.

  New Default MySQL Database Type (InnoDB)

  This change doesn’t affect our existing Piwik users, but it does reflect our commitment to performance and reliability. We’ve changed the default MySQL database type to be InnoDB instead of Myisam. This will allow new users to immediately gain the benefits in reliability offered by InnoDB.

  New Marketplace Plugin – HTTP Authentication

  We’re releasing a new plugin on the marketplace that will allow you to use the HTTP authentication services provided by your webserver. Learn more about this plugin on the marketplace.

  New Email Format for Scheduled Reports

  The last big change in this release is a new email report format. You can now get your email reports as CSV files as well as HTML and PDF reports.

  Other Improvements

  In addition to performance improvements and new plugins, this release contains a few other smaller improvements described below.

  Changing segments in the Embedded Dashboard

  The embedded dashboard is the powerful feature that lets you include the Piwik Dashboard without the top menu and Piwik branding, directly within your application !

  This dashboard will now include the segment selector allowing you to change the current segment and create new segments, just as you would in the normal dashboard view :

  

  Multiple Super Users

  It’s now possible for your Piwik to have more than one Super User and for Super Users to have aliases :

  

  Learn more in the User guide : Managing Super Users in Piwik.

  Smart App Banners for our Mobile Apps

  Finally, in accord with our commitment to providing great User Experience, we’ve added a smart banner to Piwik so users that view Piwik from a mobile device will be informed of our amazing (and free !) mobile apps (for both iOS and Android).

  Participate in Piwik

  Are you a talented developer or an experienced User Interface designer ? If you have some free time and if you want to contribute to one of the most awesome open source projects around, please get in touch with the Piwik team, or read this page to learn more ?

  Summary

  For the full list of changes in Piwik 2.1 check out the Changelog.

  Thank you to the core developers, all the beta testers and users, our official supporters, the translators & everyone who reported bugs or feature requests. Also thank you to the software we use, and the libraries we use.

  Many of the improvements in this release come from the efforts of Piwik PRO experts. If you are looking for help to make the most of your analytics data, contact Piwik PRO. Learn more about us here.

  If you like what you read, please tell your friends and colleagues or write on your website, blog, forums, stackoverflow, etc.

  Enjoy !