android - JavaCV convertToIplImage return NULL -


in javacv used in android,while converting frame iplimage applying color effect on video,we nullpointerexception.npe encountered of frames in video.

... while (true) {    log.d("java_cv", "counting . . . " + count);    frame original_frame = ffg.grab();     if (original_frame == null) {                      log.d("java_cv", "original_frame null at" + count);                     break;                 } else {                     log.d("java_cv", "original_frame not_null at" + count);                     if (converter == null) {                         log.d("java_cv", "converter null @ position" +count);                         continue;                      }                     opencv_core.iplimage frame1 = null;                     if (original_frame != null) {                         frame1 = converter.converttoiplimage(original_frame);                     } else {                         continue;                     }                      if (frame1 == null) {                         log.d("java_cv", "frame1 null at" + count);                     } else {                          if (!frame1.isnull() && original_frame.image != null) {                               int width = frame1.width();                             int height = frame1.height();                             int channel = frame1.nchannels();                             opencv_core.iplimage frame2 = opencv_core.iplimage.create(width, height, opencv_core.ipl_depth_8u, channel);                             if (frame2 == null)                                 continue;                             opencv_core.cvcopy(frame1, frame2);                             opencv_core.iplimage frame3 = opencv_core.iplimage.create(width, height, opencv_core.ipl_depth_8u, 1);                             if (frame3 == null)                                 continue;                             opencv_imgproc.cvcvtcolor(frame2, frame3, opencv_imgproc.cv_bgra2gray);                              log.d("java_cv", "frame1 not_null at" + count + " height " + frame1.height());                             frame resultframe = converter.convert(frame3);                             if (resultframe == null)                                 continue;                             recorder.record(resultframe);                             frame1.release();                             frame2.release();                             frame3.release();                             original_frame = null;                         } else {                             break;                         }                     }                 }                 count++;             }  ...

the exception stack here :

06-20 12:00:57.664  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ java.lang.nullpointerexception: pointer address null. 06-20 12:00:57.664  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ org.bytedeco.javacpp.opencv_core$iplimage.width(native method) 06-20 12:00:57.664  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ org.bytedeco.javacv.opencvframeconverter.isequal(opencvframeconverter.java:75) 06-20 12:00:57.664  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ org.bytedeco.javacv.opencvframeconverter.converttoiplimage(opencvframeconverter.java:85) 06-20 12:00:57.664  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ org.bytedeco.javacv.opencvframeconverter$toiplimage.convert(opencvframeconverter.java:41) 06-20 12:00:57.664  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ com.appxperts.opencvfirstapp.mainactivitysecond.kaamdg(mainactivitysecond.java:161) 06-20 12:00:57.664  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ com.appxperts.opencvfirstapp.mainactivitysecond$1.onclick(mainactivitysecond.java:62) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ android.view.view.performclick(view.java:4463) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ android.view.view$performclick.run(view.java:18789) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ android.os.handler.handlecallback(handler.java:808) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ android.os.handler.dispatchmessage(handler.java:103) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ android.os.looper.loop(looper.java:193)`enter code here` 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ android.app.activitythread.main(activitythread.java:5299) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ java.lang.reflect.method.invokenative(native method) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ java.lang.reflect.method.invoke(method.java:515) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:825) 06-20 12:00:57.665  30245-30245/com.appxperts.opencvfirstapp w/system.err﹕ @ com.android.internal.os.zygoteinit.main(zygoteinit.java:641)


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