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• CMake on Ubuntu, Requested 'libavdevice' >= 56.4.100 but version of libavdevice is 53.2.0

  5 mars 2019, par user1830386

  I am trying to get into plug in writing for Gazebo but keep running into an error when compiling my programs.

  Requested 'libavdevice >= 56.4.100' but version of libavdevice is 53.2.0
  
  CMake Error at /usr/share/cmake- 
  
  3.10/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  
  Could NOT find AVDEVICE (missing: AVDEVICE_FOUND) (Required is at least
  
  version "56.4.100")

  but when I do ffmpeg -version I get :

   libavdevice    57. 10.100 / 57. 10.100

  Yet CMake seems to think I’m on version 53. Trying to update ffmpeg or libavdevice-dev returns that I am on the latest version.

  Here is my make file :

  cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
  
  
  
  find_package(gazebo REQUIRED)
  
  include_directories(${GAZEBO_INCLUDE_DIRS})
  
  link_directories(${GAZEBO_LIBRARY_DIRS})
  
  list(APPEND CMAKE_CXX_FLAGS "${GAZEBO_CXX_FLAGS}")
  
  
  
  add_library(model_control SHARED model_control.cc)
  
  target_link_libraries(model_control ${GAZEBO_LIBRARIES})
  
  
  
  list(APPEND CMAKE_CXX_FLAGS "${GAZEBO_CXX_FLAGS}")

  and the cc file :

  #include <functional>
  
  #include <gazebo></gazebo>gazebo.hh>
  
  #include <gazebo></gazebo>physics/physics.hh>
  
  #include <gazebo></gazebo>common/common.hh>
  
  #include <ignition></ignition>math/Vector3.hh>
  
  
  
  namespace gazebo
  
  {
  
    class ModelPush : public ModelPlugin
  
    {
  
      public: void Load(physics::ModelPtr _parent, sdf::ElementPtr /*_sdf*/)
  
      {
  
        // Store the pointer to the model
  
        this->model = _parent;
  
  
  
        // Listen to the update event. This event is broadcast every
  
        // simulation iteration.
  
        this->updateConnection = event::Events::ConnectWorldUpdateBegin(
  
            std::bind(&amp;ModelPush::OnUpdate, this));
  
      }
  
  
  
      // Called by the world update start event
  
      public: void OnUpdate()
  
      {
  
        // Apply a small linear velocity to the model.
  
        this->model->SetLinearVel(ignition::math::Vector3d(.3, 0, 0));
  
      }
  
  
  
      // Pointer to the model
  
      private: physics::ModelPtr model;
  
  
  
      // Pointer to the update event connection
  
      private: event::ConnectionPtr updateConnection;
  
    };
  
  
  
    // Register this plugin with the simulator
  
    GZ_REGISTER_MODEL_PLUGIN(ModelPush)
  
  }
  
  </functional>

  Thanks !

• Anomalie #4413 (Nouveau) : get_magic_quotes_runtime obsolète en php 7.4

  14 décembre 2019, par Franck D

  Hello :)
  get_magic_quotes_runtime est obsolète en php 7.4 https://www.php.net/manual/fr/function.get-magic-quotes-runtime.php et le plug contient :
  https://zone.spip.org/trac/spip-zone/browser/spip-zone/_core_/plugins/archiviste/inc/pclzip.php#L5292
  https://zone.spip.org/trac/spip-zone/browser/spip-zone/_core_/plugins/archiviste/inc/pclzip.php#L5304
  https://zone.spip.org/trac/spip-zone/browser/spip-zone/_core_/plugins/archiviste/inc/pclzip.php#L5326

  Il y a en aussi deux dans la lib getid3 de media, mais faudra sans doute attendre qu’il sorte une nouvelle version, par contre, à voir si nous ne pouvons pas nous inspiré de sont patch :
  https://github.com/JamesHeinrich/getID3/commit/75454e8b19c7b1b041382b91906574fe484f605b
  https://github.com/JamesHeinrich/getID3/commit/1b836c57ec8f4f072068caae0cf9d843ee88d50b

  Franck

• Ffmpeg hangs when -vcodec copy specified (called from Java via ProcessBuilder)

  24 juin 2015, par Inglonias

  I’m trying to use ffmpeg to export an array of bytes to a video file, but the people I work with insist that I use -vcodec copy in the arguments for it. This, however, causes the code to hang, whereas if I don’t use -vcodec copy, the code will not hang. I don’t know what the problem is, and I’ve been trying to debug this code for the past two hours.

  Here is the relevant section of code. I’ve added comments above and below the line where the code hangs. Can anybody help me ?

          // This is the tricky part. We need to build an ffmpeg process that
  
          // takes input from stdin, and then plug Java into that.
  
          ProcessBuilder ffmpegBuilder = new ProcessBuilder();
  
          String[] cmd = {"ffmpeg", "-i", "-","-vcodec", "copy", directory
  
                  + "/" + fileName};
  
          StringBuilder combinedCmd = new StringBuilder();
  
          for (String s : cmd) {
  
              combinedCmd.append(s);
  
              combinedCmd.append(" ");
  
          }
  
          mLogger.log(Level.INFO,"Final command is " + combinedCmd.toString());
  
          ffmpegBuilder.command(cmd);
  
          ffmpegBuilder.redirectErrorStream(true); // So that stdout and stderr go
  
                                                      // to the same stream.
  
          byte[] dataToWrite = new byte[data.size()];
  
          for (int i = 0; i < dataToWrite.length; i++) {
  
              dataToWrite[i] = data.get(i); // Is there really STILL no better way
  
                                              // to convert an ArrayList to an
  
                                              // array?!
  
          }
  
          try {
  
              Process ffmpeg = ffmpegBuilder.start();
  
              OutputStream stdin = ffmpeg.getOutputStream();
  
              BufferedReader stdout = new BufferedReader(new InputStreamReader(
  
                      ffmpeg.getInputStream()));
  
  //HANGS AT THIS LINE vvvvvvvvvvvvvvvv
  
              stdin.write(dataToWrite);
  
  //HANGS AT THIS LINE ^^^^^^^^^^^^^^^^
  
  
  
              String line = "I know a song that gets on everybody's nerves...";
  
              while ((line != null) && stdout.ready()) {
  
                  line = stdout.readLine();
  
                  mLogger.log(Level.INFO, line);
  
              }
  
              try {
  
                  ffmpeg.waitFor(2, TimeUnit.SECONDS);
  
                  ffmpeg.destroyForcibly();
  
              } catch (InterruptedException e) {
  
                  // TODO Auto-generated catch block
  
                  e.printStackTrace();
  
              }
  
          } catch (IOException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          }