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• Is it possible to customize frame rate of video capturing in android ?

  2 avril 2013, par dilipkaklotar

  I am currently working on video capturing application. I want to record video with these properties

  h.264 640x480 - 30 FPS, first 90 seconds

  but my device screen size is only 320x480 it doesn't contain any other screen size to capture/record video.

  How to integrate small small video clips and make large

  How to integrate voice to video

  Please give some suggestion to fixed this issue.

• How to install JavaCV on Android and use FrameGrabber

  9 octobre 2016, par Mark

  Could someone tell me where I’m doing wrong ? These are the steps that I have followed :

  1. Downloaded the adt-bundle-windows from android developer website
  2. Created a new project and a libs/armeabi folder

  3. Extract all the *.so files from javacv-android-arm.jar, opencv-2.4.3-android-arm.zip, and ffmpeg-1.0-android-arm.zip directly into the newly created "libs/armeabi" folder, without creating any new subdirectories.

     (A part that I don’t understand is "Extract all the *.so files from javacv-android-arm.jar", I simply inserted the javacv-android-arm.jar file inside libs/armeabi folder)

  4. Navigated to Project > Properties > Java Build Path > Libraries and click "Add JARs...".
  5. Selected both javacpp.jar and javacv.jar from the newly created "libs" folder.

  After that I have downloaded OpenCV2.4.3 from here and ffmpeg from here and extracted the files on my C :/ root.
  Finally after setting my system path...,

  C:\opencv\build\x64\vc10\bin;C:\ffmpeg-64\bin;C:\Program Files\Java\jdk1.7.0_10\bin

  ...if I try to use simply FrameGrabber in my Android application...

  import com.googlecode.javacv.FFmpegFrameGrabber;
  
  import com.googlecode.javacpp.Loader;
  
  import com.googlecode.javacv.*;
  
  import com.googlecode.javacv.cpp.*;
  
  import static com.googlecode.javacv.cpp.opencv_core.*;
  
  import static com.googlecode.javacv.cpp.opencv_imgproc.*;
  
  import static com.googlecode.javacv.cpp.opencv_calib3d.*;
  
  import static com.googlecode.javacv.cpp.opencv_objdetect.*;
  
  
  
  import android.os.Bundle;
  
  import android.app.Activity;
  
  import android.view.Menu;
  
  
  
  public class MainActivity extends Activity {
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          FFmpegFrameGrabber i = new FFmpegFrameGrabber("/mnt/sdcard/SinglePerson.avi"); 
  
      }

  ...I get the following errors :

  01-29 17:59:26.976: E/AndroidRuntime(30656): FATAL EXCEPTION: main
  
  01-29 17:59:26.976: E/AndroidRuntime(30656): java.lang.NoClassDefFoundError: com.googlecode.javacv.FFmpegFrameGrabber
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at com.example.xxxxxxxxx.MainActivity.onCreate(MainActivity.java:23)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.app.Activity.performCreate(Activity.java:4465)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.app.ActivityThread.access$600(ActivityThread.java:123)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.os.Handler.dispatchMessage(Handler.java:99)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.os.Looper.loop(Looper.java:137)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at android.app.ActivityThread.main(ActivityThread.java:4424)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at java.lang.reflect.Method.invokeNative(Native Method)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at java.lang.reflect.Method.invoke(Method.java:511)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  
  01-29 17:59:26.976: E/AndroidRuntime(30656):    at dalvik.system.NativeStart.main(Native Method)

  Someone can help me please ?

• vf_drawtext : do not reset the frame number in config_input.

  18 mars 2013, par Anton Khirnov

  vf_drawtext : do not reset the frame number in config_input.
  Frame number should be incremented normally even if the link properties
  
  change.
  

  • [DBH] libavfilter/vf_drawtext.c