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• "only position independent executables (PIE) are supported" error in FFMPEG Android Lollipop

  2 juin 2015, par Karthikeyan

  I am using FFMPEG support library to convert bunch of images to video. It works fine on earlier version of the android lollipop. But in the lollipop it generates the following error. ***error: only position independent executables (PIE) are supported.*** I know the PIE Security restrictions has been changed in lollipop, but i don’t know how to fix it.

  From my knowledge it may have two possible solutions,

  either

  we need to relocate the FFMPEG library assets to the SDCard and we have to refer them from our coding, if this is the answer what are all the steps to be followed ?

  or

  Is there any update in the FFMPEG library for android lollipop.

  If both are wrong can you provide me with the proper solution.

  Many thanks...

  Here is my code

     try {
  
              Log.e(LOGTAG, "started");
  
  
  
              String[] ffmpegCommand = {"/data/data/com.mobvcasting.mjpegffmpeg/ffmpeg", "-r", ""+p.getPreviewFrameRate(), "-b", "1000000", "-vcodec", "mjpeg", "-i", 
  
                      Environment.getExternalStorageDirectory().getPath() + "/req_images/frame_%05d.jpg", Environment.getExternalStorageDirectory().getPath() + "/req_images/video.mov"};
  
  
  
              ffmpegProcess = new ProcessBuilder(ffmpegCommand).redirectErrorStream(true).start();            
  
  
  
              OutputStream ffmpegOutStream = ffmpegProcess.getOutputStream();
  
              BufferedReader reader = new BufferedReader(new InputStreamReader(ffmpegProcess.getInputStream()));
  
  
  
              String line;
  
  
  
              Log.v(LOGTAG,"***Starting FFMPEG***");
  
              while ((line = reader.readLine()) != null)
  
              {
  
                  Log.v(LOGTAG,"***"+line+"***");
  
              }
  
              Log.v(LOGTAG,"***Ending FFMPEG***");
  
  
  
  
  
          } catch (IOException e) {
  
              e.printStackTrace();
  
          }
  
  
  
          if (ffmpegProcess != null) {
  
              ffmpegProcess.destroy();        
  
          }
  
          Log.e(LOGTAG, "Background done");

• Android NDK : Getting java.lang.UnsatisfiedLinkError : dlopen failed : cannot locate symbol "signal" referenced by "libffmpeg.so"

  27 février 2015, par Gaganpreet Singh

  I have a video trimmer application code .

  Its Android.mk file code is mentioned below :

  MY_LOCAL_PATH := $(call my-dir)

  include $(all-subdir-makefiles)

  LOCAL_PATH :=$(MY_LOCAL_PATH)
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE    := video-trimmer
  
  LOCAL_SRC_FILES := video-trimmer.c
  
  LOCAL_C_INCLUDES := $(MY_LOCAL_PATH) $(MY_LOCAL_PATH)/ffmpeg
  
  LOCAL_SHARED_LIBRARIES := ffmpeg 
  
  LOCAL_LDLIBS += -lz -llog
  
  include $(BUILD_SHARED_LIBRARY)

  and Application.mk file code is :

  APP_MODULES      := ffmpeg video-trimmer
  
  APP_OPTIM := debug

  When I try to run this application, I get following error :

  02-26 16:06:05.779: E/AndroidRuntime(4092): FATAL EXCEPTION: main
  
  02-26 16:06:05.779: E/AndroidRuntime(4092): Process: net.video.trimmer, PID: 4092
  
  02-26 16:06:05.779: E/AndroidRuntime(4092): java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "signal" referenced by "libffmpeg.so"...
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.Runtime.loadLibrary(Runtime.java:364)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.System.loadLibrary(System.java:526)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at net.video.trimmer.service.VideoTrimmingService.onCreate(VideoTrimmingService.java:29)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2585)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread.access$1800(ActivityThread.java:139)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.os.Handler.dispatchMessage(Handler.java:102)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.os.Looper.loop(Looper.java:136)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread.main(ActivityThread.java:5086)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.reflect.Method.invokeNative(Native Method)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.reflect.Method.invoke(Method.java:515)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at dalvik.system.NativeStart.main(Native Method)

  My video-trimmer.so and ffmpeg.so are generated in \libs\armeabi .

  Thanks in advance.

• JavaCV on Android : UnsatisfiedLinkError from libjniavdevice.so / dlopen failed cannot locate symbol "av_input_audio_device_next"

  8 septembre 2014, par liorg

  I am trying to work with JavaCV’s FFmpegFrameGrabber on Android 4.4.2 / 4.3.1 .

  Inside the onCreate(...) method I am calling :

  FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(path)

  This causes the following runtime error :

  dlopen("/data/app-lib/com.example.testjavacv-1/libjniavdevice.so")
  
  failed: dlopen failed: cannot locate symbol "av_input_audio_device_next"
  
  referenced by "libjniavdevice.so"

  Other (possible) relevant information :

  1) I have included all the JavaCV .so libraries inside the libs/armeabi and libs/x86 folders.

  2) I have given the application permissions to read/write to external storage and access the camera and microphone.

  3) I am NOT statically loading any of the JavaCV native libraries before instantiating FFmpegFrameGrabber. This is because,

  • Some of the libraries cause runtime exceptions when I attempt to load them statically by myself.
  • I get the impression that JavaCV handles it’s own native library loading - for example the error I get ocurrs even though I have not requested to load the jniavdevice.so library and happens only if the ... new FFmpegFrameGrabber(...) ... code is present.

  4) I have taken a look at : https://groups.google.com/forum/# !topic/javacv/bgB5rCv_fVM which seems to address a similar issue, but the suggested solutions don’t seem to work.

  Any help on this issue would be much appreciated,
  Cheers !