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• JavaCV record video in Android

  11 janvier 2017, par wyx

  I want to record video quiet and without preview in Android. So I choice MediaRecorder but I could record only without preview but what make me crazy is that when MediaRecorder start or stop it will with a sound dee.... I try many methods about that . But I think it perhaps sth related to the OS of the mobile. So I try JavaCV because I also want to have a Live function in my app.

  But JavaCV spent me to too much time to solve some strange problems because it’s my first time to do sth about C++ src and video.

  Just compile group: 'org.bytedeco', name: 'javacv-platform', version: '1.3' as the README.md ,I even can’t build my apk.

  Error:Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.
  
  > com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK org/bytedeco/javacpp/macosx-x86_64/libusb-1.0.dylib
  
      File1: /Users/wyx/.gradle/caches/modules-2/files-2.1/org.bytedeco.javacpp-presets/libfreenect/0.5.3-1.3/736d65a3ef042258429d8e7742128c411806b432/libfreenect-0.5.3-1.3-macosx-x86_64.jar
  
      File2: /Users/wyx/.gradle/caches/modules-2/files-2.1/org.bytedeco.javacpp-presets/libdc1394/2.2.4-1.3/f1498dacc46162ab68faeb8d66cf02b96fe41c61/libdc1394-2.2.4-1.3-macosx-x86_64.jar

  And then I modified it according this issuse
  use this to repalce. It can build the apk. But the can’t run.

    android {
  
     ..............
  
      packagingOptions {
  
          exclude 'META-INF/services/javax.annotation.processing.Processor'
  
          pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.properties'
  
          pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.xml'
  
          pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.properties'
  
          pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.xml'
  
      }
  
  }
  
  
  
  dependencies {
  
      compile group: 'org.bytedeco', name: 'javacv', version: '1.3'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '3.2.1-1.3', classifier: 'android-x86'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '3.2.1-1.3', classifier: 'android-arm'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.1.0-1.3', classifier: 'android-x86'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.1.0-1.3', classifier: 'android-arm'
  
  }

  My demo code VideoService which will invoke in MainActivity

  package com.fs.fs.api;
  
  
  
  import com.fs.fs.App;
  
  import com.fs.fs.utils.DateUtils;
  
  import com.fs.fs.utils.FileUtils;
  
  
  
  import org.bytedeco.javacpp.avcodec;
  
  import org.bytedeco.javacv.FFmpegFrameRecorder;
  
  import org.bytedeco.javacv.FrameRecorder;
  
  
  
  import java.util.Date;
  
  
  
  /**
  
   * Created by wyx on 2017/1/11.
  
   */
  
  public class VideoService {
  
      private FFmpegFrameRecorder mFrameRecorder;
  
      private String path;
  
  
  
      private VideoService() {
  
      }
  
  
  
      private static class SingletonHolder {
  
          private static final VideoService INSTANCE = new VideoService();
  
      }
  
  
  
      public static VideoService getInstance() {
  
          return SingletonHolder.INSTANCE;
  
      }
  
  
  
      public void startRecordVideo() {
  
          String fileName = String.format("%s.%s", DateUtils.date2String(new Date(), "yyyyMMdd_HHmmss"), "mp4");
  
          path = FileUtils.getExternalFullPath(App.getInstance(), fileName);
  
          mFrameRecorder = new FFmpegFrameRecorder(path, 640, 480, 1);
  
          mFrameRecorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
  
          mFrameRecorder.setVideoOption("tune", "zerolatency");
  
          mFrameRecorder.setVideoOption("preset", "ultrafast");
  
          mFrameRecorder.setVideoOption("crf", "28");
  
          mFrameRecorder.setVideoBitrate(300 * 1000);
  
          mFrameRecorder.setFormat("mp4");
  
  
  
          mFrameRecorder.setFrameRate(30);
  
          mFrameRecorder.setAudioOption("crf", "0");
  
          mFrameRecorder.setSampleRate(48 * 1000);
  
          mFrameRecorder.setAudioBitrate(960 * 1000);
  
          mFrameRecorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
  
          try {
  
              mFrameRecorder.start();
  
          } catch (FrameRecorder.Exception e) {
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      public void stop() {
  
          if (mFrameRecorder != null) {
  
              try {
  
                  mFrameRecorder.stop();
  
                  mFrameRecorder.release();
  
              } catch (FrameRecorder.Exception e) {
  
                  e.printStackTrace();
  
              }
  
              mFrameRecorder = null;
  
          }
  
      }
  
  
  
  }

  MainActivity

  package com.fs.fs.activity;
  
  
  
  import android.app.Activity;
  
  import android.os.Bundle;
  
  
  
  import com.fs.fs.R;
  
  import com.fs.fs.api.VideoService;
  
  
  
  import static java.lang.Thread.sleep;
  
  
  
  
  
  public class MainActivity extends Activity {
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
  
  
          VideoService.getInstance().startRecordVideo();
  
          try {
  
              sleep(10 * 1000);
  
          } catch (InterruptedException e) {
  
              e.printStackTrace();
  
          }
  
          VideoService.getInstance().stop();
  
      }
  
  }

  Error which make me want to cry.

  E/AndroidRuntime: FATAL EXCEPTION: main
  
                    Process: com.fs.fs, PID: 30259
  
                    java.lang.NoClassDefFoundError: java.lang.ClassNotFoundException: org.bytedeco.javacpp.avutil
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:590)
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:530)
  
                        at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694)
  
                        at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)
  
                        at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34)
  
                        at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75)
  
                        at android.app.Activity.performCreate(Activity.java:5304)
  
                        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)
  
                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)
  
                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331)
  
                        at android.app.ActivityThread.access$1000(ActivityThread.java:143)
  
                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
  
                        at android.os.Handler.dispatchMessage(Handler.java:102)
  
                        at android.os.Looper.loop(Looper.java:136)
  
                        at android.app.ActivityThread.main(ActivityThread.java:5291)
  
                        at java.lang.reflect.Method.invokeNative(Native Method)
  
                        at java.lang.reflect.Method.invoke(Method.java:515)
  
                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
  
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
  
                        at dalvik.system.NativeStart.main(Native Method)
  
                     Caused by: java.lang.ClassNotFoundException: org.bytedeco.javacpp.avutil
  
                        at java.lang.Class.classForName(Native Method)
  
                        at java.lang.Class.forName(Class.java:251)
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:585)
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:530) 
  
                        at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694) 
  
                        at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149) 
  
                        at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34) 
  
                        at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75) 
  
                        at android.app.Activity.performCreate(Activity.java:5304) 
  
                        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090) 
  
                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245) 
  
                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331) 
  
                        at android.app.ActivityThread.access$1000(ActivityThread.java:143) 
  
                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
  
                        at android.os.Handler.dispatchMessage(Handler.java:102) 
  
                        at android.os.Looper.loop(Looper.java:136) 
  
                        at android.app.ActivityThread.main(ActivityThread.java:5291) 
  
                        at java.lang.reflect.Method.invokeNative(Native Method) 
  
                        at java.lang.reflect.Method.invoke(Method.java:515) 
  
                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 
  
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
  
                        at dalvik.system.NativeStart.main(Native Method) 
  
                     Caused by: java.lang.NoClassDefFoundError: org/bytedeco/javacpp/avutil
  
                        at java.lang.Class.classForName(Native Method) 
  
                        at java.lang.Class.forName(Class.java:251) 
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:585) 
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:530) 
  
                        at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694) 
  
                        at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149) 
  
                        at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34) 
  
                        at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75) 
  
                        at android.app.Activity.performCreate(Activity.java:5304) 
  
                        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090) 
  
                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245) 
  
                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331) 
  
                        at android.app.ActivityThread.access$1000(ActivityThread.java:143) 
  
                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
  
                        at android.os.Handler.dispatchMessage(Handler.java:102) 
  
                        at android.os.Looper.loop(Looper.java:136) 
  
                        at android.app.ActivityThread.main(ActivityThread.java:5291) 
  
                        at java.lang.reflect.Method.invokeNative(Native Method) 
  
                        at java.lang.reflect.Method.invoke(Method.java:515) 
  
                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 
  
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
  
                        at dalvik.system.NativeStart.main(Native Method) 
  
                     Caused by: java.lang.ClassNotFoundException: Didn't find class "org.bytedeco.javacpp.avutil" on path: DexPathList[[zip file "/data/app/com.fs.fs-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.fs.fs-2, /vendor/lib, /system/lib, /data/datalib]]
  
                        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
  
                        at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
  
                        at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
  
                        at java.lang.Class.classForName(Native Method) 
  
                        at java.lang.Class.forName(Class.java:251) 
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:585) 
  
                        at org.bytedeco.javacpp.Loader.load(Loader.java:530) 
  
                        at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694) 
  
                        at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149) 
  
                        at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34) 
  
                        at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75) 
  
                        at android.app.Activity.performCreate(Activity.java:5304) 
  
                        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090) 
  
                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245) 
  
                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331) 
  
                        at android.app.ActivityThread.access$1000(ActivityThread.java:143) 
  
                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
  
                        at android.os.Handler.dispatchMessage(Handler.java:102) 
  
                        at android.os.Looper.loop(Looper.java:136) 
  
                        at android.app.ActivityThread.main(ActivityThread.java:5291) 
  
                        at java.lang.reflect.Method.invokeNative(Native Method) 
  
                        at java.lang.reflect.Method.invoke(Method.java:515) 
  
                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 
  
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
  
                        at dalvik.system.NativeStart.main(Native Method) 
  
  </init></clinit></init></clinit></init></clinit></init></clinit>

  So I want to know a comfortable method to achieve my goal : recode video quiet and without preview. And Live real time ?

  I found ffmpeg4android is a prefect library to run ffmpeg command. I just use it to compress videos from MediaRecorder But I don’t how to do use it to achieve my goal.

• Normalize Fish Eye Video

  19 novembre 2016, par Optonom Scientific

  I use more advance super fish eye lens. Unfortunately, I couldn’t find any technical properties of this lens.

  I want to dewrap with ffmpeg software with this command :

  ffmpeg -i left.MP4 -vf lenscorrection=cx=0.055:cy=0.005:k1=-.2:k2=-.2 new1.mp4

  In lenscorrection filter there are four parameters.

  How can I find right value for my lens ?

• Premium Plugins now available on the Piwik Analytics Marketplace

  2 novembre 2016, par Piwik Core Team — Community, Press Releases

  We are super excited to announce the launch of three new premium plugins which are now available on the Piwik Marketplace : A/B Testing, Media Analytics, and Activity Log.

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  These first premium plugins and the new Marketplace capabilities have been designed and built with love by InnoCraft – the new company brought to you by the makers of Piwik.

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  Get it now on the Marketplace

  Learn more here :

  • A/B Testing – Experiments (website).
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  • The A/B Testing User Guide and the A/B Testing FAQ help you getting started in running A/B tests. The A/B Testing developer guides help you embedding and implementing A/B tests into your project.

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  2. Media Analytics

  Do you have videos or audio on your website, or in an app ? Media Analytics gives you powerful insights into how your audience watches your videos and listens to your audio, to ultimately maximize your success.

  Learn all about your audience. Which media your users are playing, for how long, how often, and where they dropped off ? Where are your users located around the world ? Who your audience are and what did people do before and after watching a video or listening to audio ? Many of the reports are also available in Real time, so you can gain insights and react quickly.

  Get it now on the Marketplace

  Learn more here :

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  • The Media Analytics User Guide and the Media Analytics FAQ cover on how to get the most out of this plugin. The Media Analytics developer guides help you setting up the tracking of your video and audio.

  • 
    Powerful Video Analytics and Audio Analytics for Piwik
    (blog post).

  

  3. Activity log

  Keep an eye on everything that is happening on your Piwik platform with the Activity Log plugin.

  The activity log, also known as audit log or audit trail, improves your Piwik’s security and diagnostic by showing a chronological set of entries that provides documentary evidence of activities that happened in your Piwik. It allows Piwik Super Users to quickly review the actions performed by members of your organization or clients, and also lets every user review details of their own actions.

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  The Piwik Marketplace guarantees

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  About InnoCraft

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  Is the Piwik Marketplace open to all ?

  Yes, our marketplace allows other companies and developers to sell their plugins to all Piwik Analytics users. If you are a developer or a company interested in selling your plugin(s) on our Marketplace please contact us. As a developer selling plugins, you will get paid every month for your earnings, and you will be able to see detailed reports about your sales, upload new plugin updates, respond to pre-sales enquiries, etc.

  Resources

  Learn more :

  • The Piwik.org Privacy Policy has been updated (a new “Scope” and “Contact us” sections).
  • New Terms and Conditions for the Piwik Marketplace (plugins.piwik.org).
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  • What are premium plugins and how do they differ from free plugins ?.

  We are looking forward to your continued support with the Piwik project as we expand and offer you more ways to maximize your success.

  Please contact the Marketplace team with any questions or feedback.

  Wishing you a warm : Happy Analytics !