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• Unable to Add ffmpeg dlls for Aforge.net VideoWriter class in VS 2012

  22 mars 2013, par derigible

  I am writing a program that will convert Kinect RGB stream data into a video. I have found lots of pages on using the Aforge.net library to add each BitMap created by the Kinect in the AForge.Video.ffmpeg library. I have added the dll from Aforge.net, but I am still unable to use it because it says the following on the website :

  Note:Make sure you have FFmpeg binaries (DLLs) in the output folder of your application in order to use this class successfully. FFmpeg binaries can be found in Externals folder provided with AForge.NET framework's distribution.

  I have tried to add the ffmpeg DLLs as a reference to the project, but I receive the following error when I do :

  A reference to could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component.

  I do not know what this is talking about. It seems like most other examples of using this library assumes you can add it in this manner, but perhaps there is another folder I should put it in ? I am new to C# and am not familiar with how things are referenced in the dlls.

• trouble compiling ffmpeg library and converter class

  24 février 2013, par user2104126

  I am using this project as a reference : The code is avaiable at http://roman10.net/src/affmpeg.zip.

  I am trying to compile this project with ffmpeg with different configuration than the project suggests.
  I've compiled a new libffmpeg.so and added it to the project.
  However, now i'm getting an "UnsatisfiedLinkError"

  02-24 11:05:45.644: D/dalvikvm(11363): Trying to load lib /data/data/roman10.media.ffmpeg/lib/libffmpeg.so 0x47b0ec70
  
  02-24 11:05:45.680: D/dalvikvm(11363): Added shared lib /data/data/roman10.media.ffmpeg/lib/libffmpeg.so 0x47b0ec70
  
  02-24 11:05:45.680: D/dalvikvm(11363): No JNI_OnLoad found in /data/data/roman10.media.ffmpeg/lib/libffmpeg.so 0x47b0ec70, skipping init
  
  02-24 11:05:45.684: D/dalvikvm(11363): Trying to load lib /data/data/roman10.media.ffmpeg/lib/libconverter.so 0x47b0ec70
  
  02-24 11:05:45.687: I/dalvikvm(11363): Unable to dlopen(/data/data/roman10.media.ffmpeg/lib/libconverter.so): Cannot load library: link_image[1995]: failed to link libconverter.so
  
  02-24 11:05:45.687: W/dalvikvm(11363): Exception Ljava/lang/UnsatisfiedLinkError; thrown during Lroman10/media/ffmpeg/ffmpegService;.<clinit>
  
  02-24 11:05:45.687: W/dalvikvm(11363): Class init failed in newInstance call (Lroman10/media/ffmpeg/ffmpegService;)
  
  02-24 11:05:45.687: D/AndroidRuntime(11363): Shutting down VM
  
  02-24 11:05:45.687: W/dalvikvm(11363): threadid=1: thread exiting with uncaught exception (group=0x4001d7d0)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363): FATAL EXCEPTION: main
  
  02-24 11:05:45.695: E/AndroidRuntime(11363): java.lang.ExceptionInInitializerError
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.Class.newInstanceImpl(Native Method)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.Class.newInstance(Class.java:1429)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread.handleCreateService(ActivityThread.java:2940)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread.access$3300(ActivityThread.java:125)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2087)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.os.Handler.dispatchMessage(Handler.java:99)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.os.Looper.loop(Looper.java:123)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread.main(ActivityThread.java:4627)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.reflect.Method.invokeNative(Native Method)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.reflect.Method.invoke(Method.java:521)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at dalvik.system.NativeStart.main(Native Method)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363): Caused by: java.lang.UnsatisfiedLinkError: Library converter not found
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.Runtime.loadLibrary(Runtime.java:461)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.System.loadLibrary(System.java:557)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at roman10.media.ffmpeg.ffmpegService.<clinit>(ffmpegService.java:123)
  
  </clinit></clinit>

  I decided to recompile the converter.so file
  however, when running the ndk-build command on it, i receive these messages :

  c:\Users\user\workspace\Main\jni>c:\work\android-ndk-r8d\ndk-build
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converter'
  
  
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converte
  
  r'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converter'
  
  
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converte
  
  r'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:439: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//libs/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:439: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//libs/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  "Compile thumb : converter <= cmdutils.c
  
  c:/Users/user/workspace/Main//jni/cmdutils.c:32:34: fatal error: libavformat/avf
  
  ormat.h: No such file or directory
  
  compilation terminated.
  
  make: *** [c:/Users/user/workspace/Main//obj/local/armeabi/objs/converter/cmduti
  
  ls.o] Error 1

  What can I do to fix this, and make it work ?

• FFmpeg : java.lang.UnsatisfiedLinkError while calling Runnable class

  12 mars 2013, par Yuliya Tarasenko

  I need to take a picture file and an audio file and create a video.
  I know that it's possible to do with the help of

  Runtime.getRuntime().exec("ffmpeg -i image.jpeg -i audio.mp3 out.avi") 

  but only for rooted devices, so I've tried to create JNI wrapper for main() from ffmpeg.c and call it from my Activity like here : http://demo860.blogspot.com/2010/07/android-ffmpeg-dynamic-module-jni.html

  1.This code is in ffmpeg.c :

  int m_argc = 0;
  
  char *m_pargv [30];
  
  
  
  int dynamic_ffpmeg_main (int argc, char **argv);
  
  jint JNICALL Java_com_ccmedia_codec_ffmpeg_mod_1run ( JNIEnv *, jclass, jstring,     jstring );
  
  
  
  jint JNICALL Java_com_ccmedia_codec_ffmpeg_mod_1run ( JNIEnv *env, jclass class, jstring pj1, jstring pj2)
  
  {
  
      // as in http://demo860.blogspot.com/2010/07/android-ffmpeg-dynamic-module-jni.html
  
  }
  
  
  
  int dynamic_ffpmeg_main(int argc, char **argv)
  
  {
  
  // as in http://demo860.blogspot.com/2010/07/android-ffmpeg-dynamic-module-jni.html
  
  }
  
  
  
  int main(int argc, char **argv)
  
  {
  
      dynamic_ffpmeg_main ( argc, argv );
  
      return 0;
  
  }

  2.This code is in my .java :

  public class FFmpegCreator implements Runnable {
  
  
  
      static boolean m_bret = false;
  
  static String m_szconfig = " -i /sdcard/file.mpg -vcodec mpeg4 aaa.mpg";
  
  
  
  //public native String unimplementedStringFromJNI();
  
  
  
  static {
  
      try {
  
  
  
          System.out.println("[AdDBCache] Module load try ffmpeg : "
  
                  + System.getProperty("java.library.path"));
  
  
  
          // System.load("/sdcard/arm_and/bin/libffmpeg.so");
  
  
  
          System.loadLibrary("ffmpeg");
  
  
  
          System.out.println("[AdDBCache] Module load success");
  
  
  
      }
  
  
  
      catch (Exception e) {
  
  
  
          System.out.println("[AdDBCache] Module load err : "
  
                  + System.getProperty("java.library.path"));
  
  
  
      }
  
  
  
  }
  
  
  
  private static synchronized final native int Java_com_ccmedia_codec_ffmpeg_mod_1run(String name, String sztoken);
  
  
  
  public void set_config(String sz_config) {
  
  
  
      m_szconfig = sz_config;
  
  
  
  }
  
  
  
  public void run_core(String sz_file, String sz_token) {
  
  
  
      int n_stat;
  
      m_bret = false;
  
      n_stat = Java_com_ccmedia_codec_ffmpeg_mod_1run(m_szconfig, sz_token);
  
      m_bret = true;
  
  
  
  }
  
  
  
  public void run() {
  
  
  
      run_core("", "");
  
  
  
  }
  
  }

  3.And this in my Activity :

  FFmpegCreator f = new FFmpegCreator ();
  
  new Thread(f).start();

  But I have

  E/AndroidRuntime(25682): java.lang.UnsatisfiedLinkError: Java_com_ccmedia_codec_ffmpeg_mod_1run .

  And I can't understand why... FFmpeg build was successful...
  Could anyone help me, please ? I'll really appreciate if you could help me. Thank you.