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• Frame loss while FFmpeg video splitting

  27 mai 2016, par Gurinderbeer Singh

  I am using ffmpeg to split the video file into multiple parts by following command. But there is frame loss.

     ffmpeg -i input.mp4 -ss 00:00:00 -t 00:10:00 -c copy output.mp4

  For example there are total 17983 frames in complete video file. But total number of frames combined in all the splitted parts is 17970. So there are 13 frames less.

  Can anyone please tell, if there is any method by which we can split the video without any frame loss. Even by using some other tool than ffmpeg.

  Thanks....

• ffmpeg stops randomly with "No more output streams to write to, finishing" when reading rtsp stream [on hold]

  7 juin 2016, par ImagineDragon

  Basically I am running the following ffmpeg command to read an h264 rtsp stream using hls muxer, under Ubuntu 14.04 64bit with i7 CPU and 8GB memory :

  ffmpeg -v debug -i rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB -codec copy -flags -global_header -f hls -hls_time 5 -use_localtime 1 -hls_segment_filename '/home/eason/ffmpeg-test/%s.ts' '/home/eason/ffmpeg-test/live.m3u8'
  
  ffmpeg version N-79139-gde1a0d4 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  
    libavutil      55. 19.100 / 55. 19.100
  
    libavcodec     57. 30.100 / 57. 30.100
  
    libavformat    57. 29.101 / 57. 29.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 40.102 /  6. 40.102
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Splitting the commandline.
  
  Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
  
  Reading option '-re' ... matched as option 're' (read input at native frame rate) with argument '1'.
  
  Reading option '-i' ... matched as input file with argument 'rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB'.
  
  Reading option '-codec' ... matched as option 'codec' (codec name) with argument 'copy'.
  
  Reading option '-flags' ... matched as AVOption 'flags' with argument '-global_header'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'hls'.
  
  Reading option '-hls_time' ... matched as AVOption 'hls_time' with argument '5'.
  
  Reading option '-use_localtime' ... matched as AVOption 'use_localtime' with argument '1'.
  
  Reading option '-hls_segment_filename' ... matched as AVOption 'hls_segment_filename' with argument '/home/eason/ffmpeg-test/%s.ts'.
  
  Reading option '/home/eason/ffmpeg-test/live.m3u8' ... matched as output file.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option v (set logging level) with argument debug.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB.
  
  Applying option re (read input at native frame rate) with argument 1.
  
  Successfully parsed a group of options.
  
  Opening an input file: rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB.
  
  [tcp @ 0x29c4d60] No default whitelist set
  
  [rtsp @ 0x29c2e20] SDP:
  
  m=video 0 RTP/AVP 96
  
  a=rtpmap:96 H264/90000
  
  a=fmtp:96 packetization-mode=1;profile-level-id=640028;sprop-parameter-sets=Z2QAKKzoBQBbkA==,aO48sA==
  
  a=control:trackID=0
  
  m=audio 0 RTP/AVP 98
  
  a=rtpmap:98 MPEG4-GENERIC/16000/1
  
  a=fmtp:98 profile-level-id=1;mode=AAC-lbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408;cpresent=0;
  
  a=control:trackID=1
  
  
  
  
  
  [rtsp @ 0x29c2e20] video codec set to: h264
  
  [rtsp @ 0x29c2e20] RTP Packetization Mode: 1
  
  [rtsp @ 0x29c2e20] RTP Profile IDC: 64 Profile IOP: 0 Level: 28
  
  [rtsp @ 0x29c2e20] Extradata set to 0x29c4ff0 (size: 22)
  
  [rtsp @ 0x29c2e20] audio codec set to: aac
  
  [rtsp @ 0x29c2e20] audio samplerate set to: 16000
  
  [rtsp @ 0x29c2e20] audio channels set to: 1
  
  [rtp @ 0x29c50a0] No default whitelist set
  
  [udp @ 0x29c5200] No default whitelist set
  
  [udp @ 0x29c5200] end receive buffer size reported is 131072
  
  [udp @ 0x29d9480] No default whitelist set
  
  [udp @ 0x29d9480] end receive buffer size reported is 131072
  
  [rtsp @ 0x29c2e20] method SETUP failed: 461 Unsupported transport
  
  [rtsp @ 0x29c2e20] CSeq: 3
  
  
  
  [rtsp @ 0x29c2e20] setting jitter buffer size to 0
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] hello state=0
  
  [rtsp @ 0x29c2e20] All info found
  
  [rtsp @ 0x29c2e20] rfps: 24.250000 0.018062
  
  [rtsp @ 0x29c2e20] rfps: 24.333333 0.012911
  
  [rtsp @ 0x29c2e20] rfps: 24.416667 0.008627
  
  [rtsp @ 0x29c2e20] rfps: 24.500000 0.005207
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.583333 0.002653
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.666667 0.000965
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.750000 0.000142
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.833333 0.000185
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.916667 0.001093
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 25.000000 0.002867
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 25.083333 0.005507
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 25.166667 0.009011
  
  [rtsp @ 0x29c2e20] rfps: 25.250000 0.013382
  
  [rtsp @ 0x29c2e20] rfps: 25.333333 0.018618
  
  [rtsp @ 0x29c2e20] rfps: 50.000000 0.011469
  
  Input #0, rtsp, from 'rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB':
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0, 28, 1/90000: Video: h264 (High), 1 reference frame, yuv420p(left), 1280x720, 1/180000, 24.75 tbr, 90k tbn, 180k tbc
  
      Stream #0:1, 23, 1/16000: Audio: aac (LC), 16000 Hz, mono, fltp
  
  Successfully opened the file.
  
  Parsing a group of options: output file /home/eason/ffmpeg-test/live.m3u8.
  
  Applying option codec (codec name) with argument copy.
  
  Applying option f (force format) with argument hls.
  
  Successfully parsed a group of options.
  
  Opening an output file: /home/eason/ffmpeg-test/live.m3u8.
  
  Successfully opened the file.
  
  [file @ 0x2cae180] Setting default whitelist 'file,crypto'
  
  [mpegts @ 0x29f7ce0] muxrate VBR, pcr every 9000 pkts, sdt every 2147483647, pat/pmt every 2147483647 pkts
  
  Output #0, hls, to '/home/eason/ffmpeg-test/live.m3u8':
  
    Metadata:
  
      encoder         : Lavf57.29.101
  
      Stream #0:0, 0, 1/90000: Video: h264, 1 reference frame, yuv420p(left), 1280x720 (0x0), 1/90000, q=2-31, 24.75 tbr, 90k tbn, 90k tbc
  
      Stream #0:1, 0, 1/90000: Audio: aac (LC), 16000 Hz, mono
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
      Last message repeated 103 times
  
  [hls @ 0x2a0fc00] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [AVIOContext @ 0x2c998c0] Statistics: 0 seeks, 155 writeouts=N/A speed=1.01x    
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2ca9fc0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2caa080] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c97c60] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2c97d20] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 104 writeouts=N/A speed=   1x    
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c99680] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2c99820] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 28 writeoutse=N/A speed=   1x    
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x29c2ce0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 111 writeouts=N/A speed=   1x    
  
  [file @ 0x2c97d40] Setting default whitelist 'file,crypto'
  
  [file @ 0x2a134e0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2a11000] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 105 writeouts=N/A speed=   1x    
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2a10c00] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:1
  
  [AVIOContext @ 0x2a10cc0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c99480] Setting default whitelist 'file,crypto'
  
  
  
  .......repeat........
  
  
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:71
  
  [AVIOContext @ 0x2c97fa0] Statistics: 0 seeks, 1 writeouts
  
  [rtsp @ 0x29c2e20] Too short data for FU-A H264 RTP packette=N/A speed=   1x    
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x2c97b20] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c97c60] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:72
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 156 writeouts=N/A speed=   1x    
  
  [file @ 0x2c99480] Setting default whitelist 'file,crypto'
  
  [file @ 0x2cab600] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:73
  
  [AVIOContext @ 0x2cab6c0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 104 writeouts=N/A speed=   1x    
  
  [file @ 0x2cadc00] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c99480] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:74
  
  [AVIOContext @ 0x29c2ce0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x2a13540] Setting default whitelist 'file,crypto'
  
  [file @ 0x2cab680] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:75
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 1 writeouts
  
  No more output streams to write to, finishing.:46.09 bitrate=N/A speed=0.993x    
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 138 writeouts
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:76
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 1 writeouts
  
  frame= 8423 fps= 21 q=-1.0 Lsize=N/A time=00:06:46.09 bitrate=N/A speed=0.993x    
  
  video:37031kB audio:1586kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Input file #0 (rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB):
  
    Input stream #0:0 (video): 8423 packets read (37919815 bytes); 
  
    Input stream #0:1 (audio): 6345 packets read (1624337 bytes); 
  
    Total: 14768 packets (39544152 bytes) demuxed
  
  Output file #0 (/home/eason/ffmpeg-test/live.m3u8):
  
    Output stream #0:0 (video): 8423 packets muxed (37919815 bytes); 
  
    Output stream #0:1 (audio): 6345 packets muxed (1624337 bytes); 
  
    Total: 14768 packets (39544152 bytes) muxed
  
  0 frames successfully decoded, 0 decoding errors

  The problem is that ffmpeg exits randomly after 5 to 20 minutes. The RTSP is a live stream so stopping every 5 minute is really not acceptable. In the ffmpeg log I can’t see any noticeable error except "No more output streams to write to, finishing." near the end. Can someone shed some light upon this ? How can I make ffmpeg run without stopping ? Thanks

• how to merge an audio file with an image in android using javaCV

  11 mai 2016, par Darshan Soni

  I have aleady tried some code but it is throwing exception like this,

  05-11 17:34:00.449 1838-2316/darshan.fragments_demo E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
  
                                                                        Process: darshan.fragments_demo, PID: 1838
  
                                                                        java.lang.RuntimeException: An error occurred while executing doInBackground()
  
                                                                            at android.os.AsyncTask$3.done(AsyncTask.java:309)
  
                                                                            at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
  
                                                                            at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
  
                                                                            at java.util.concurrent.FutureTask.run(FutureTask.java:242)
  
                                                                            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
  
                                                                            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
  
                                                                            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
  
                                                                            at java.lang.Thread.run(Thread.java:818)
  
                                                                         Caused by: java.lang.UnsatisfiedLinkError: org.bytedeco.javacpp.avutil
  
                                                                            at java.lang.Class.classForName(Native Method)
  
                                                                            at java.lang.Class.forName(Class.java:324)
  
                                                                            at org.bytedeco.javacpp.Loader.load(Loader.java:413)
  
                                                                            at org.bytedeco.javacpp.Loader.load(Loader.java:381)
  
                                                                            at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2597)
  
                                                                            at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:386)
  
                                                                            at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:380)
  
                                                                            at darshan.fragments_demo.Layout1$Test.doInBackground(Layout1.java:166)
  
                                                                            at darshan.fragments_demo.Layout1$Test.doInBackground(Layout1.java:136)
  
                                                                            at android.os.AsyncTask$2.call(AsyncTask.java:295)
  
                                                                            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  
                                                                            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
  
                                                                            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
  
                                                                            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
  
                                                                            at java.lang.Thread.run(Thread.java:818)
  
  </clinit>

   
  Now in gradle file I’ve included some libraries my gradle file is as follow,

  apply plugin: 'com.android.application'
  
  
  
  android {
  
      compileSdkVersion 23
  
      buildToolsVersion "23.0.2"
  
  
  
          packagingOptions {
  
              exclude 'META-INF/LICENSE'
  
              exclude 'META-INF/LICENSE-FIREBASE.txt'
  
              exclude 'META-INF/NOTICE'
  
              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'
  
  
  
          }
  
  
  
  
  
      defaultConfig {
  
          applicationId "darshan.fragments_demo"
  
          minSdkVersion 16
  
          targetSdkVersion 23
  
          versionCode 1
  
          versionName "1.0"
  
      }
  
      buildTypes {
  
          release {
  
              minifyEnabled false
  
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
          }
  
      }
  
  }
  
  
  
  dependencies {
  
      compile fileTree(dir: 'libs', include: ['*.jar'])
  
      testCompile 'junit:junit:4.12'
  
  
  
      compile 'com.android.support:appcompat-v7:23.1.1'
  
      compile 'com.android.support:design:23.1.1'
  
      compile group: 'org.bytedeco', name: 'javacv', version: '1.1'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '2.4.11-0.11', classifier: 'android-arm'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '2.4.11-0.11', classifier: 'android-x86'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.6.1-0.11', classifier: 'android-arm'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.6.1-0.11', classifier: 'android-x86'
  
  
  
  
  
  }

  And java file is as follow,

  public class Test extends AsyncTask {
  
  
  
      ProgressDialog dialog;
  
      FFmpegFrameRecorder recorder;
  
      String videoPath;
  
      protected void onPreExecute() {
  
          dialog = new ProgressDialog(Layout1.this);
  
          dialog.setMessage("Genrating video, Please wait.........");
  
          dialog.setCancelable(false);
  
          //dialog.show();
  
      };
  
      @Override
  
      protected Void doInBackground(Void... params) {
  
  
  
          File folder = Environment.getExternalStorageDirectory();
  
          String path = folder.getAbsolutePath() + "/DCIM/Camera";
  
          // ArrayList<string> paths = (ArrayList<string>) getListOfFiles(path, "jpg");
  
          long millis = System.currentTimeMillis();
  
          videoPath = path + "/" + "test_sham_"+millis+".3gp";
  
  
  
          try {
  
  
  
  
  
  
  
              //audio grabber
  
  
  
              FFmpegFrameGrabber grabber2 = new FFmpegFrameGrabber(folder.getAbsolutePath()+"/bluetooth/abcd.mp3");
  
  
  
              //video grabber
  
              FFmpegFrameGrabber grabber1 = new FFmpegFrameGrabber(path+"/1.jpg");
  
              grabber1.start();
  
  
  
              grabber2.start();
  
  
  
              recorder = new FFmpegFrameRecorder(path
  
                      + "/" + "test_sham_"+millis+".mp4",  grabber1.getImageWidth(), grabber1.getImageHeight(),2);
  
  
  
              //recorder.setVideoCodec(5);
  
              recorder.setVideoCodec(avcodec.AV_CODEC_ID_MPEG4);
  
              // recorder.setVideoCodec(avcodec.AV_CODEC_ID_MP4ALS);
  
  
  
              //recorder.setFormat("3gp");
  
                recorder.setFormat("mp4");
  
              recorder.setFrameRate(30);
  
              recorder.setSampleRate(grabber2.getSampleRate());
  
              recorder.setVideoBitrate(30);
  
              long startTime = System.currentTimeMillis();
  
              recorder.start();
  
  
  
              Frame frame1, frame2 = null;
  
  
  
              while ((frame1 = grabber1.grabFrame()) != null ||
  
  
  
                      (frame2 = grabber2.grabFrame()) != null) {
  
  
  
                  recorder.record(frame1);
  
  
  
                  recorder.record(frame2);
  
  
  
              }
  
  
  
              recorder.stop();
  
  
  
              grabber1.stop();
  
  
  
              grabber2.stop();
  
  
  
  
  
  
  
  
  
              System.out.println("Total Time:- " + recorder.getTimestamp());
  
  
  
          } catch (Exception e) {
  
              e.printStackTrace();
  
          }
  
  
  
          return null;
  
      }
  
  }
  
  </string></string>

  I just cant figure out what is wrong with the implementation
  Please help