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• FFMPEG - latest build doesn't work, earlier build does

  21 juin 2020, par rossmcm

  I have been using FFMPEG to overlay coloured rectangles on a video. I updated FFMPEG and it no longer works. No error is issued, it just doesn't do the job - the resulting video is the same as the input video. Here's the script :

  


  FFMpeg -y -i Input.mp4 -filter_complex \
  "nullsrc=size=1920x1080,  \
  drawbox=x=200:y=100:w=300:h=150:t=20:c=yellow,  fade=in:st=10:d=1:alpha=1, fade=out:st=20:d=2:alpha=1 [tmp1]; \ 
  nullsrc=size=1920x1080,  \
  drawbox=x=240:y=140:w=300:h=150:t=20:c=red,  fade=in:st=15:d=1:alpha=1, fade=out:st=25:d=2:alpha=1 [tmp2]; \
  [tmp1][tmp2] overlay=0:0:shortest=1[tmp3]; \
  [0:v][tmp3] overlay=0:0:shortest=1" \
  Output.mp4


  


  The output video should be the input video with a yellow rectangle added from T=10 to T=20 and a red rectangle from T=15 to T=25, fading them in and out.

  


  The version that was working (3.4) was one that came with an ImageMagick installation. The version I updated it to was 4.2.3. I tried it on various other builds I had lying around and it only works with 3.4.

  


  It seems unlikely that this is a regression so I haven't submitted a bug report. I figure it's more likely that I'm not doing something correctly and 3.4 is more lenient on its interpretation of my command.

  


  Whatever, I prefer to be working with a current build, so I invite comments on what the reasons might be.

  


  Console dump of 3.4 run

  


  ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 7.2.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:01:48.67, start: 0.000000, bitrate: 1693 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1562 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 (h264) -> overlay:main (graph 0)
  overlay (graph 0) -> Stream #0:0 (libx264)
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 000001f0d4a0e6a0] using SAR=1/1
[libx264 @ 000001f0d4a0e6a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000001f0d4a0e6a0] profile High, level 4.0
[libx264 @ 000001f0d4a0e6a0] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'Output-34.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
    Metadata:
      encoder         : Lavc57.107.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 aac
frame= 3260 fps= 25 q=-1.0 Lsize=   21461kB time=00:01:48.56 bitrate=1619.3kbits/s speed=0.828x
video:19713kB audio:1634kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.534457%
[libx264 @ 000001f0d4a0e6a0] frame I:14    Avg QP:17.68  size:208205
[libx264 @ 000001f0d4a0e6a0] frame P:844   Avg QP:21.55  size: 16867
[libx264 @ 000001f0d4a0e6a0] frame B:2402  Avg QP:28.40  size:  1263
[libx264 @ 000001f0d4a0e6a0] consecutive B-frames:  0.7%  2.9%  0.4% 96.0%
[libx264 @ 000001f0d4a0e6a0] mb I  I16..4: 14.0% 39.6% 46.4%
[libx264 @ 000001f0d4a0e6a0] mb P  I16..4:  0.4%  0.7%  0.2%  P16..4: 20.2%  9.1%  4.6%  0.0%  0.0%    skip:64.8%
[libx264 @ 000001f0d4a0e6a0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 12.4%  0.4%  0.1%  direct: 0.1%  skip:87.1%  L0:42.9% L1:55.2% BI: 1.9%
[libx264 @ 000001f0d4a0e6a0] 8x8 transform intra:45.2% inter:68.3%
[libx264 @ 000001f0d4a0e6a0] coded y,uvDC,uvAC intra: 64.4% 81.6% 45.1% inter: 2.9% 4.2% 0.1%
[libx264 @ 000001f0d4a0e6a0] i16 v,h,dc,p: 32% 26%  6% 37%
[libx264 @ 000001f0d4a0e6a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 20% 15%  5%  6%  7%  7%  7%  8%
[libx264 @ 000001f0d4a0e6a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 28%  8%  4%  6%  6%  6%  5%  5%
[libx264 @ 000001f0d4a0e6a0] i8c dc,h,v,p: 37% 25% 28% 10%
[libx264 @ 000001f0d4a0e6a0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000001f0d4a0e6a0] ref P L0: 70.4% 15.3% 10.8%  3.5%
[libx264 @ 000001f0d4a0e6a0] ref B L0: 93.1%  6.0%  0.9%
[libx264 @ 000001f0d4a0e6a0] ref B L1: 97.8%  2.2%
[libx264 @ 000001f0d4a0e6a0] kb/s:1486.03
[aac @ 000001f0d4a10a20] Qavg: 1586.609


  


  And 4.2.3

  


  ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:01:48.67, start: 0.000000, bitrate: 1693 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1562 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 (h264) -> overlay:main (graph 0)
  overlay (graph 0) -> Stream #0:0 (libx264)
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 000001e7b4531d40] using SAR=1/1
[libx264 @ 000001e7b4531d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000001e7b4531d40] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 000001e7b4531d40] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'Output-423.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.54.100 aac
frame= 3260 fps= 28 q=-1.0 Lsize=   21425kB time=00:01:48.56 bitrate=1616.7kbits/s speed=0.917x
video:19686kB audio:1625kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.535352%
[libx264 @ 000001e7b4531d40] frame I:14    Avg QP:17.68  size:208355
[libx264 @ 000001e7b4531d40] frame P:844   Avg QP:21.54  size: 16838
[libx264 @ 000001e7b4531d40] frame B:2402  Avg QP:28.43  size:  1261
[libx264 @ 000001e7b4531d40] consecutive B-frames:  0.7%  2.9%  0.4% 96.0%
[libx264 @ 000001e7b4531d40] mb I  I16..4: 13.9% 39.7% 46.4%
[libx264 @ 000001e7b4531d40] mb P  I16..4:  0.4%  0.7%  0.2%  P16..4: 20.2%  9.1%  4.6%  0.0%  0.0%    skip:64.8%
[libx264 @ 000001e7b4531d40] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 12.4%  0.4%  0.1%  direct: 0.1%  skip:87.1%  L0:42.9% L1:55.2% BI: 1.9%
[libx264 @ 000001e7b4531d40] 8x8 transform intra:45.3% inter:68.3%
[libx264 @ 000001e7b4531d40] coded y,uvDC,uvAC intra: 65.2% 82.4% 45.8% inter: 2.9% 4.2% 0.1%
[libx264 @ 000001e7b4531d40] i16 v,h,dc,p: 32% 24%  6% 38%
[libx264 @ 000001e7b4531d40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 19% 14%  5%  6%  7%  7%  7%  8%
[libx264 @ 000001e7b4531d40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 28%  8%  4%  6%  6%  6%  5%  5%
[libx264 @ 000001e7b4531d40] i8c dc,h,v,p: 37% 24% 28% 11%
[libx264 @ 000001e7b4531d40] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000001e7b4531d40] ref P L0: 70.4% 15.3% 10.8%  3.5%
[libx264 @ 000001e7b4531d40] ref B L0: 93.1%  6.0%  0.9%
[libx264 @ 000001e7b4531d40] ref B L1: 97.8%  2.2%
[libx264 @ 000001e7b4531d40] kb/s:1483.98
[aac @ 000001e7b47fa800] Qavg: 1462.566


  


• Find a great Google Tag Manager alternative in Matomo Tag Manager

  29 avril 2020, par Joselyn Khor — Analytics Tips, Development, Marketing, Plugins
  If you’re looking for a tag management system that rivals Google’s, then Matomo Tag Manager is a great Google Tag Manager alternative that takes your tracking to the next level.

  What’s a tag manager ?

  If you’re not familiar with Google Tag Manager or Matomo Tag Manager – they’re both free tag management systems that let you manage all your website code snippets (tags) in one place. 

  Tags are typically JavaScript code or HTML that lets you integrate various features into your site in just a few clicks. For example : analytics codes, conversion tracking codes, exit popups and surveys, remarketing codes, social widgets, affiliates, and ads. With a tag manager, you get to easily look into and manage these different tracking codes.

  Why use a tag manager ?

  Tag management systems are game changers because they let you track important data more effectively by easily adding code snippets (tags) to your website. 

  By not needing to hard code each individual code you also save time. Rather than waiting for someone to make tag changes and to deploy your website, you can make the changes yourself without needing the technical expertise of a developer.

  Why is Matomo Tag Manager a great Google Tag Manager alternative ?

   Matomo Tag Manager is a great Google Tag Manager alternative. Not only does it let you manage all your tracking and marketing tags in one place, it also offers less complexity and more flexibility. 

  By tagging your website and using Matomo Tag Manager alongside Matomo Analytics, you can collect much more data than you’d be able to otherwise. 

  A bonus to using Matomo is the privacy and data ownership aspect. With Matomo you also get the added peace of mind that comes with 100% data ownership and privacy protection. You will never be left wondering what’s happening to your data. Rest assured knowing you’re doing the best to protect user privacy, while getting useful insights to improve your website. 

  And since Matomo Tag Manager is the one of the best alternatives to Google Tag Manager, you’ll gain more than you lose by having full confidence that your data is yours to own.

  

  Three key benefits of using Matomo Tag Manager :

  • Empowers you to deploy and manage your own tags
    This takes the hassle out of needing a web developer to hard code and edit every tag on your website. Now you can deploy tracking code on chosen pages and track various data yourself. 

  • Open up endless possibilities on data tracking
    Dig a lot deeper to track analytics, conversions, and more. Now you can implement advanced tracking solutions without needing to pay an external source. 

  • Save time and create your own impact
    With limited resources you certainly don’t want to be wasting any time having to go back and forth with an external party over what tags to add or take away. An over-dependence on web developers or agencies carrying out tag management for you, stalls growth and experimentation opportunities. With a tag management system you have the convenience of inserting your own tags and getting to a desired outcome faster. You won’t have to forgo tracking opportunities because now it’s in your hands.

  Next step : free tag manager training

• when i record video with javacv it comes "java.lang.NoClassDefFoundError : org.bytedeco.javacpp.avutil"

  9 avril 2020, par Pradeep Simba

  I make a video recorder android app with javacv.
But, when i run this app this error occurs "java.lang.NoClassDefFoundError : org.bytedeco.javacpp.avutil".

  



  How can I solve this error ?

  



  gradle.build file

  



    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 {

implementation group: 'org.bytedeco', name: 'javacv', version: '1.1'
implementation group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-arm'
implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-arm'
implementation group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-x86'
implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-x86'

}


  



  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

  



      E/AndroidRuntime: FATAL EXCEPTION: main&#xA;    Process: com.example.usb, PID: 660&#xA;    java.lang.NoClassDefFoundError: org.bytedeco.javacpp.avutil&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:590)&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:530)&#xA;                      at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694)&#xA;                      at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)&#xA;                      at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34)&#xA;                      at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75)&#xA;                      at android.app.Activity.performCreate(Activity.java:5304)&#xA;                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)&#xA;                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)&#xA;                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331)&#xA;                      at android.app.ActivityThread.access$1000(ActivityThread.java:143)&#xA;                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)&#xA;                      at android.os.Handler.dispatchMessage(Handler.java:102)&#xA;                      at android.os.Looper.loop(Looper.java:136)&#xA;                      at android.app.ActivityThread.main(ActivityThread.java:5291)&#xA;                      at java.lang.reflect.Method.invokeNative(Native Method)&#xA;                      at java.lang.reflect.Method.invoke(Method.java:515)&#xA;                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)&#xA;                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)&#xA;                      at dalvik.system.NativeStart.main(Native Method)&#xA;                   Caused by: java.lang.ClassNotFoundException: org.bytedeco.javacpp.avutil&#xA;                      at java.lang.Class.classForName(Native Method)&#xA;                      at java.lang.Class.forName(Class.java:251)&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:585)&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:530)&#xA0;&#xA;                      at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694)&#xA0;&#xA;                      at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)&#xA0;&#xA;                      at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34)&#xA0;&#xA;                      at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75)&#xA0;&#xA;                      at android.app.Activity.performCreate(Activity.java:5304)&#xA0;&#xA;                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)&#xA0;&#xA;                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)&#xA0;&#xA;                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331)&#xA0;&#xA;                      at android.app.ActivityThread.access$1000(ActivityThread.java:143)&#xA0;&#xA;                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)&#xA0;&#xA;                      at android.os.Handler.dispatchMessage(Handler.java:102)&#xA0;&#xA;                      at android.os.Looper.loop(Looper.java:136)&#xA0;&#xA;                      at android.app.ActivityThread.main(ActivityThread.java:5291)&#xA0;&#xA;                      at java.lang.reflect.Method.invokeNative(Native Method)&#xA0;&#xA;                      at java.lang.reflect.Method.invoke(Method.java:515)&#xA0;&#xA;                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)&#xA0;&#xA;                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)&#xA0;&#xA;                      at dalvik.system.NativeStart.main(Native Method)&#xA0;&#xA;                   Caused by: java.lang.NoClassDefFoundError: org/bytedeco/javacpp/avutil&#xA;                      at java.lang.Class.classForName(Native Method)&#xA0;&#xA;                      at java.lang.Class.forName(Class.java:251)&#xA0;&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:585)&#xA0;&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:530)&#xA0;&#xA;                      at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694)&#xA0;&#xA;                      at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)&#xA0;&#xA;                      at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34)&#xA0;&#xA;                      at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75)&#xA0;&#xA;                      at android.app.Activity.performCreate(Activity.java:5304)&#xA0;&#xA;                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)&#xA0;&#xA;                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)&#xA0;&#xA;                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331)&#xA0;&#xA;                      at android.app.ActivityThread.access$1000(ActivityThread.java:143)&#xA0;&#xA;                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)&#xA0;&#xA;                      at android.os.Handler.dispatchMessage(Handler.java:102)&#xA0;&#xA;                      at android.os.Looper.loop(Looper.java:136)&#xA0;&#xA;                      at android.app.ActivityThread.main(ActivityThread.java:5291)&#xA0;&#xA;                      at java.lang.reflect.Method.invokeNative(Native Method)&#xA0;&#xA;                      at java.lang.reflect.Method.invoke(Method.java:515)&#xA0;&#xA;                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)&#xA0;&#xA;                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)&#xA0;&#xA;                      at dalvik.system.NativeStart.main(Native Method)&#xA0;&#xA;                   Caused by: java.lang.ClassNotFoundException: Didn&#x27;t find class "org.bytedeco.javacpp.avutil" on path: DexPathList[[zip file "/data/app/com.fs.fs-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.fs.fs-2, /vendor/lib, /system/lib, /data/datalib]]&#xA;                      at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)&#xA;                      at java.lang.ClassLoader.loadClass(ClassLoader.java:497)&#xA;                      at java.lang.ClassLoader.loadClass(ClassLoader.java:457)&#xA;                      at java.lang.Class.classForName(Native Method)&#xA0;&#xA;                      at java.lang.Class.forName(Class.java:251)&#xA0;&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:585)&#xA0;&#xA;                      at org.bytedeco.javacpp.Loader.load(Loader.java:530)&#xA0;&#xA;                      at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694)&#xA0;&#xA;                      at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)&#xA0;&#xA;                      at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34)&#xA0;&#xA;                      at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75)&#xA0;&#xA;                      at android.app.Activity.performCreate(Activity.java:5304)&#xA0;&#xA;                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)&#xA0;&#xA;                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)&#xA0;&#xA;                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331)&#xA0;&#xA;                      at android.app.ActivityThread.access$1000(ActivityThread.java:143)&#xA0;&#xA;                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)&#xA0;&#xA;                      at android.os.Handler.dispatchMessage(Handler.java:102)&#xA0;&#xA;                      at android.os.Looper.loop(Looper.java:136)&#xA0;&#xA;                      at android.app.ActivityThread.main(ActivityThread.java:5291)&#xA0;&#xA;                      at java.lang.reflect.Method.invokeNative(Native Method)&#xA0;&#xA;                      at java.lang.reflect.Method.invoke(Method.java:515)&#xA0;&#xA;                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)&#xA0;&#xA;                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)&#xA0;&#xA;                      at dalvik.system.NativeStart.main(Native Method)&#xA0;&#xA;</init></clinit></init></clinit></init></clinit></init></clinit>

  



  How can i solve this error ?

  



  Why error occurs ?