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• FFmpeg rtp streaming opus file problems

  22 avril 2017, par Yuriy Aizenberg

  i have the next situation.

  1. Have file on remote VPS server.
  2. I want that this file (opus codec) can be accessible through RTP on my android phone.

  3. I tried ffmpeg with next command :

     ffmpeg -ar 44800 -i bon_jovi_loverboy.opus -acodec libopus -ac 1 -ab 96k -vn -f rtp rtp://127.0.0.1:5004 -loglevel 56

  But got next error :

  bon_jovi_loverboy.opus: Invalid data found when processing input

  Full log :

  root@cs82932 :/home/rstream/rtstream/src# ffmpeg -ar 44800 -i bon_jovi_loverboy.opus -acodec libopus -ac 1 -ab 96k -vn -f rtp rtp ://127.0.0.1:5004 -loglevel 56
  ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1 16.04.4) 20160609
  configuration : —prefix=/usr —extra-version=0ubuntu0.16.04.1 —build-suffix=-ffmpeg —toolchain=hardened —libdir=/usr/lib/x86_64-linux-gnu —incdir=/usr/include/x86_64-linux-gnu —cc=cc —cxx=g++ —enable-gpl —enable-shared —disable-stripping —disable-decoder=libopenjpeg —disable-decoder=libschroedinger —enable-avresample —enable-avisynth —enable-gnutls —enable-ladspa —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libcdio —enable-libflite —enable-libfontconfig —enable-libfreetype —enable-libfribidi —enable-libgme —enable-libgsm —enable-libmodplug —enable-libmp3lame —enable-libopenjpeg —enable-libopus —enable-libpulse —enable-librtmp —enable-libschroedinger —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libssh —enable-libtheora —enable-libtwolame —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx265 —enable-libxvid —enable-libzvbi —enable-openal —enable-opengl —enable-x11grab —enable-libdc1394 —enable-libiec61883 —enable-libzmq —enable-frei0r —enable-libx264 —enable-libopencv
  libavutil 54. 31.100 / 54. 31.100
  libavcodec 56. 60.100 / 56. 60.100
  libavformat 56. 40.101 / 56. 40.101
  libavdevice 56. 4.100 / 56. 4.100
  libavfilter 5. 40.101 / 5. 40.101
  libavresample 2. 1. 0 / 2. 1. 0
  libswscale 3. 1.101 / 3. 1.101
  libswresample 1. 2.101 / 1. 2.101
  libpostproc 53. 3.100 / 53. 3.100
  Splitting the commandline.
  Reading option ’-ar’ ... matched as option ’ar’ (set audio sampling rate (in Hz)) with argument ’44800’.

  Reading option ’-i’ ... matched as input url with argument ’bon_jovi_loverboy.opus’.

  Reading option ’-acodec’ ... matched as option ’acodec’ (force audio codec (’copy’ to copy stream)) with argument ’libopus’.

  Reading option ’-ac’ ... matched as option ’ac’ (set number of audio channels) with argument ’1’.

  Reading option ’-ab’ ... matched as option ’ab’ (audio bitrate (please use -b:a)) with argument ’96k’.

  Reading option ’-vn’ ... matched as option ’vn’ (disable video) with argument ’1’.

  Reading option ’-f’ ... matched as option ’f’ (force format) with argument ’rtp’.

  Reading option ’rtp ://127.0.0.1:5004’ ... matched as output url.

  Reading option ’-loglevel’ ... matched as option ’loglevel’ (set logging level) with argument ’56’.

  Finished splitting the commandline.
  Parsing a group of options : global .
  Applying option loglevel (set logging level) with argument 56.

  Successfully parsed a group of options.

  Parsing a group of options : input url bon_jovi_loverboy.opus.
  Applying option ar (set audio sampling rate (in Hz)) with argument 44800.
  Successfully parsed a group of options.
  Opening an input file : bon_jovi_loverboy.opus.

  [AVIOContext @ 0x965e60] Statistics : 36389 bytes read, 0 seeks
  bon_jovi_loverboy.opus : Invalid data found when processing input

  What wrong ? Thanks

  UPD

  I update ffmpeg and streaming looks successfully.

      ffmpeg -stream_loop -1 -i 4a6u7-ptl2w.opus -acodec libopus -ac 1 -ab 
  
             96k -vn -f rtp rtp://95.213.195.192:5004/f.opus
  
  ffmpeg version 3.2.4-1~16.04.york1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.1 (Ubuntu 5.4.1-5ubuntu2~16.04.york1) 20170210
  
    configuration: --prefix=/usr --extra-version='1~16.04.york1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Input #0, ogg, from '4a6u7-ptl2w.opus':
  
    Duration: 00:02:34.21, start: 0.000000, bitrate: 69 kb/s
  
      Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
  
      Metadata:
  
        ENCODER         : Lavc57.77.100 libopus
  
  Output #0, rtp, to 'rtp://95.213.195.192:5004/f.opus':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Audio: opus (libopus), 48000 Hz, mono, flt, 96 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 libopus
  
  SDP:
  
  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=No Name
  
  c=IN IP4 95.213.195.192
  
  t=0 0
  
  a=tool:libavformat 57.56.101
  
  m=audio 5004 RTP/AVP 97
  
  b=AS:96
  
  a=rtpmap:97 opus/48000/2
  
  
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (opus (native) -> opus (libopus))
  
  Press [q] to stop, [?] for help
  
  size=   44893kB time=00:52:18.12 bitrate= 117.2kbits/s speed=56.5x

  But when i try to connect by rtp from local PC (VLC Player) i get the exception :

           core error: socket bind error: Cannot assign requested address
  
           core error: open of `rtp://95.213.195.192:5004/f.opus' failed

  When i try ffplay on remote pc (same where ffmpeg) :

      ffplay rtp://95.213.195.192:5004/f.opus
  
  
  
  ffplay version 3.2.4-1~16.04.york1 Copyright (c) 2003-2017 the FFmpeg developers
  
    built with gcc 5.4.1 (Ubuntu 5.4.1-5ubuntu2~16.04.york1) 20170210
  
    configuration: --prefix=/usr --extra-version='1~16.04.york1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Segmentation fault

  Can you help me ? Thanks

  95.213.195.192 - IP of my remote server with file

• bash script to install / update ffmpeg static builds

  1er mars 2017, par Joakim

  Hi I’m trying to make my first "real" bash script to do some real work than can be executed both manually and through cron jobs.

  The script should download and install the ffmpeg-static-build from https://johnvansickle.com/ffmpeg

  Here is what I’ve got so far :

  #!/bin/bash
  
  # Still to come, see if the script runs with root privileges else exit
  
  #Download FFMPEG static daily build and it's md5
  
  cd ~
  
  wget https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz | tar -xf
  
  #wget https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5
  
  curl -L https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5 | tar -xf | tee -a https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz | cut -d\  -f1 | md5sum > md5sum.txt
  
  
  
  
  
  #Chech the md5 is currect
  
  #md5sum -c MD5SUMS
  
  file1="md5sum.txt"
  
  file2="ffmpeg-git-64bit-static.tar.xz.md5"
  
  
  
  if ! cmp --silent "$file1" "$file2"; then
  
      echo "md5sum doesn't match...\n exit" >&2
  
      exit 1
  
  fi
  
  
  
  
  
  #tar -xf ffmpeg-*.tar.xz
  
  cp ffmpeg-*-static/ff* /usr/bin/
  
  cp ffmpeg-*-static/ff* /usr/local/bin/
  
  cp ffmpeg-*-static/qt-faststart /usr/bin/
  
  cp ffmpeg-*-static/qt-faststart /usr/local/bin/
  
  # Consider change second location to use ln -s
  
  # Remove downloads and do some clean up
  
  
  
  rm -fr ffmpeg-*
  
  
  
  #EOF

  As you can see in the script i would like to add the md5sum check but it fails (got the md5sum check part from Compare md5 sums in bash script)

  If i remove the md5sum part the script is working, but right now the script fails at the | tar -xf | part with this code

  2017-02-28 00:10:24 (617 KB/s) - ‘ffmpeg-git-64bit-static.tar.xz’ saved [17564756/17564756]
  
  
  
  tar: option requires an argument -- 'f'
  
  Try 'tar --help' or 'tar --usage' for more information.
  
  tee: 'https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz': No such file or directory
  
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
  
                                   Dload  Upload   Total   Spent    Left  Speed
  
  100    65  100    65    0     0     87      0 --:--:-- --:--:-- --:--:--    87
  
  (23) Failed writing body
  
  md5sum doesn't match...
  
   exit

  As this is my first, I would appreciate any "I’m 4 years old" advices and why

  update

  Have made some changes to the script based on the suggestions in this thread, but my problem is I have no output what so ever at this state :( So I think it’s time to ask for the next clue

  #!/bin/bash
  
  
  
  # version 0.3z
  
  
  
  ## Download FFMPEG static daily build and it's md5
  
  ## 
  
  ## To make this script working you might need to change the below values
  
  ## based on whether you are using a 32bit or 64 bit OS
  
  ## to obtain the right links you have to have a look @ https://johnvansickle.com/ffmpeg/
  
  ## and then change those below
  
  ## 
  
  ## If you are running on a shared server or dowsn't have root priviliges you might need to uncomment
  
  ## point 5.
  
  
  
  
  
  # a "~" means running users home folder :) and should be different from destination dir
  
  download_dir=~
  
  
  
  # as this can change if the ffmpeg is to be stored on ex. shared server
  
  dest_dir=/usr/bin/
  
  
  
  # The version it equal the filename from above link
  
  version=ffmpeg-git-64bit-static.tar.xz
  
  
  
  ## Do not change anything below here!!
  
  source_url=https://johnvansickle.com/ffmpeg/builds/${version}
  
  md5_url=https://johnvansickle.com/ffmpeg/builds/${version}.md5
  
  
  
  # Still to come, see if the script runs with write privileges else exit
  
  
  
  # 1. Can we enter download directory else exit
  
  cd ${download_dir} ||
  
  
  
          printf "%s\n" "You can't enter this folder.\nPlease chage download_dir in this script..." >&2
  
          exit 1
  
  
  
  # 2. Check the md5 is correct or have changed from last check
  
  ## instead of downloading ffmpeg-git-64bit-static.tar.xz every time,
  
  ## regardless if it is new or not, I recommend only downloading it
  
  ## if the md5 does not match. Would save John some bandwidth at least
  
  ## thx for the idea to @LordNeckbeard
  
  
  
  
  
  
  
  ## So somehow i'll guess some sed or grep only first part is nessesary :(
  
  ## This is getting more advance than expected for a first time script :/
  
  
  
  if ! diff <(md5sum ${version}) <(curl -s ${md5_url})
  
  
  
      then
  
          printf "%s\n" "md5sum doesn't match...\n
  
                          Downloading new version" >&2
  
          rm -f ${version} >&2
  
          curl ${source_url} -o ${download_dir}/${version} >&2
  
          #exit 2
  
  
  
      elif
  
          diff <(md5sum ${version}) <(curl -s ${md5_url})
  
          printf "%s\n" "Nothing new to download" >&2
  
        exit 3
  
  fi
  
  
  
  # 3. untar
  
  tar -xf ffmpeg-git-*-static.tar.xz
  
  
  
  # 4. Move builds to destination directories
  
  
  
  mv ${download_dir}/ffmpeg-*-static/ff* ${dest_dir}/
  
  mv ${download_dir}/ffmpeg-*-static/qt-faststart ${dest_dir}/
  
  
  
  # 5. Make soft links to static builds
  
  ln -sfn ${dest_dir}/qt-faststart /usr/local/bin/qt-faststart
  
  ln -sfn ${dest_dir}/ffmpeg /usr/local/bin/ffmpeg
  
  ln -sfn ${dest_dir}/ffmpeg-10bit /usr/local/bin/ffmpeg-10bit
  
  ln -sfn ${dest_dir}/ffprobe /usr/local/bin/ffprobe
  
  ln -sfn ${dest_dir}/ffserver /usr/local/bin/ffserver
  
  
  
  # Remove unzipped folder to do some clean up
  
  
  
  rm -fr ffmpeg-git-*-static/
  
  
  
  #EOF

  note : do to some more in depth answering of why not compile from source :
  1. This precompiled is usable on all Linux variations, despite distro and version
  2. It usable on shared hosting servers with ssh access

  UPDATE 2

      #!/bin/bash
  
  
  
  # version 0.4z
  
  
  
  ## Download FFMPEG static daily build and it's md5
  
  ## 
  
  ## To make this script working you might need to change the below values
  
  ## based on whether you are using a 32bit or 64 bit OS
  
  ## to obtain the right links you have to have a look @ https://johnvansickle.com/ffmpeg/
  
  ## and then change those below
  
  ## 
  
  ## Finished and working script should be distributed under GPLv3: free as in freedom
  
  ## 
  
  ## If you are running on a shared server or dowsn't have root priviliges you might need to uncomment
  
  ## point 5.
  
  
  
  
  
  # a "~" means running users home folder :) and should be different from destination dir
  
  download_dir=~
  
  
  
  # as this can change if the ffmpeg is to be stored on ex. shared server
  
  dest_dir=/usr/bin/
  
  
  
  # The version it equal the filename from above link
  
  version=ffmpeg-git-64bit-static.tar.xz
  
  
  
  ## Do not change anything below here!!
  
  source_url=https://johnvansickle.com/ffmpeg/builds/${version}
  
  md5="curl -s https://johnvansickle.com/ffmpeg/builds/${version}.md5"
  
  
  
  # Still to come, see if the script runs with write privileges else exit
  
  
  
  # 1. Can we enter download directory else exit
  
  cd ${download_dir} || 
  
          printf "%s\n" "You can't enter this folder.\nPlease chage download_dir in this script..." >&2
  
          exit 1
  
  
  
  # 2. Check the md5 is correct or have changed from last check
  
  ## instead of downloading ffmpeg-git-64bit-static.tar.xz every time,
  
  ## regardless if it is new or not, I recommend only downloading it
  
  ## if the md5 does not match. Would save John some bandwidth at least
  
  ## thx for the idea to @LordNeckbeard
  
  
  
  ## This is getting more advance than expected for a first time script :/
  
  
  
  if diff <(md5sum ${version}) <(${md5})
  
  
  
      then
  
          printf "%s\n" "No new version availeble" >&2
  
          exit 1
  
  
  
  elif ! diff <(md5sum ${version}) <(${md5})
  
      then
  
          rm -f ${version}
  
          curl ${source_url} > ${version}
  
          exit 0
  
  
  
          #only proceed if downloaded version match it's md5
  
          if ! diff <(md5sum ${version}) <(${md5})
  
              then
  
              rm -f ${version}
  
              printf "%s\n" "Downloaded version is damaged, try later\ndamaged version have been deleted" >&2
  
              exit 1
  
          fi
  
  
  
              # 3. untar
  
              tar -xf ffmpeg-git-*-static.tar.xz
  
  
  
              # 4. Move builds to destination directories
  
              mv ${download_dir}/ffmpeg-*-static/ff* ${dest_dir}/
  
              mv ${download_dir}/ffmpeg-*-static/qt-faststart ${dest_dir}/
  
  
  
              # 5. Make soft links to static builds
  
              ln -sfn ${dest_dir}/qt-faststart /usr/local/bin/qt-faststart
  
              ln -sfn ${dest_dir}/ffmpeg /usr/local/bin/ffmpeg
  
              ln -sfn ${dest_dir}/ffmpeg-10bit /usr/local/bin/ffmpeg-10bit
  
              ln -sfn ${dest_dir}/ffprobe /usr/local/bin/ffprobe
  
              ln -sfn ${dest_dir}/ffserver /usr/local/bin/ffserver
  
  
  
              # Remove unzipped folder to do some clean up
  
              rm -fr ffmpeg-git-*-static/
  
              printf "%s\n" "Going to install new version" >&2
  
              exit 1
  
  fi
  
  #EOF

  But still having some issues :(

  1. Running this script returns : a blanc shell, but I’ve expected one of the printf statements
  2. When I’m trying to narrow down the problem and going back to basic and trying to run the script with only the "if" part it fails with 44 : Syntax error : "(" unexpected

  3. running the very same "if" part typed directly into the shell/terminal itself it’s all happy !!
     if diff <(md5sum ffmpeg-git-64bit-static.tar.xz) <(curl -s "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5"); then printf "%s\n" "No new version availeble" >&2; elif ! diff <(md5sum ffmpeg-git-64bit-static.tar.xz) <(curl -s "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5"); then rm -f ffmpeg-git-64bit-static.tar.xz; curl https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz > ffmpeg-git-64bit-static.tar.xz; printf "%s\n" "Going to install new version" >&2; fi

  4. I’m confused

• Media type mismatch Error in ffmpeg-android while Concating videos

  21 mars 2017, par Karandeep Atwal

  I concat different mp4 videos with different properties like aspect ratio, SAR value, frame size using this command in ffmpeg-android-

   final String joinVideo = "-i "+Vid1+" -i "+Vid2+" -i "+Vid3+" -i "+Vid4+" -filter_complex [0]setdar=16/9[a];[1]setdar=16/9[b];[2]setdar=16/9[c];[3]setdar=16/9[d];[a][b][c][d]concat=n=4:v=1:a=1 "+Outputfile;

  My logcat shows-

  03-21 13:06:05.537 26112-26311/com.karandeepEnact I/System.out: --onStart-->
  
  03-21 13:06:05.545 26112-26312/com.karandeepEnact D/FFmpeg: Running publishing updates method
  
  03-21 13:06:05.576 26112-26112/com.karandeepEnact I/System.out: --onProgress-->ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
  03-21 13:06:05.580 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  built with gcc 4.8 (GCC)
  
  03-21 13:06:05.580 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  03-21 13:06:05.620 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libavutil      55. 17.103 / 55. 17.103
  
  03-21 13:06:05.621 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libavcodec     57. 24.102 / 57. 24.102
  
  03-21 13:06:05.621 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libavformat    57. 25.100 / 57. 25.100
  
  03-21 13:06:05.621 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libavdevice    57.  0.101 / 57.  0.101
  
  03-21 13:06:05.621 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libavfilter     6. 31.100 /  6. 31.100
  
  03-21 13:06:05.621 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libswscale      4.  0.100 /  4.  0.100
  
  03-21 13:06:05.621 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libswresample   2.  0.101 /  2.  0.101
  
  03-21 13:06:05.621 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  libpostproc    54.  0.100 / 54.  0.100
  
  03-21 13:06:05.653 26112-26112/com.karandeepEnact I/System.out: --onProgress-->Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid.mp4':
  
  03-21 13:06:05.653 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Metadata:
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    major_brand     : isom
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    minor_version   : 512
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    compatible_brands: isomiso2avc1mp41
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    title           : 1282287935171187
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    encoder         : Lavf56.40.101
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Duration: 00:12:11.52, start: 0.169000, bitrate: 292 kb/s
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 400x400, 268 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
  
  03-21 13:06:05.654 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Metadata:
  
  03-21 13:06:05.655 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      handler_name    : VideoHandler
  
  03-21 13:06:05.655 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #0:1(und): Audio: aac (HE-AACv2) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 19 kb/s (default)
  
  03-21 13:06:05.676 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Metadata:
  
  03-21 13:06:05.679 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      handler_name    : SoundHandler
  
  03-21 13:06:05.679 26112-26112/com.karandeepEnact I/System.out: --onProgress-->[mov,mp4,m4a,3gp,3g2,mj2 @ 0xad6b9600] sample aspect ratio already set to 1:1, ignoring 'pasp' atom (65536:65536)
  
  03-21 13:06:05.788 26112-26112/com.karandeepEnact I/System.out: --onProgress-->Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid1.mp4':
  
  03-21 13:06:05.789 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Metadata:
  
  03-21 13:06:05.789 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    major_brand     : mp42
  
  03-21 13:06:05.789 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    minor_version   : 0
  
  03-21 13:06:05.789 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    compatible_brands: isommp42
  
  03-21 13:06:05.790 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    creation_time   : 2017-03-20 09:36:26
  
  03-21 13:06:05.790 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    com.android.version: 7.0
  
  03-21 13:06:05.790 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Duration: 00:00:09.47, start: 0.000000, bitrate: 6138 kb/s
  
  03-21 13:06:05.815 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #1:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 720x480, 6004 kb/s, SAR 1:1 DAR 3:2, 29.99 fps, 30 tbr, 90k tbn, 180k tbc (default)
  
  03-21 13:06:05.815 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Metadata:
  
  03-21 13:06:05.816 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      rotate          : 90
  
  03-21 13:06:05.816 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      creation_time   : 2017-03-20 09:36:26
  
  03-21 13:06:05.816 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      handler_name    : VideoHandle
  
  03-21 13:06:05.816 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Side data:
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      displaymatrix: rotation of -90.00 degrees
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Metadata:
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      creation_time   : 2017-03-20 09:36:26
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      handler_name    : SoundHandle
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid2.mp4':
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Metadata:
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    major_brand     : mp42
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    minor_version   : 1
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    compatible_brands: mp41mp42isom
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    creation_time   : 2017-02-28 04:56:18
  
  03-21 13:06:05.817 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Duration: 00:00:30.87, start: 0.000000, bitrate: 568 kb/s
  
  03-21 13:06:05.832 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 400x400, 482 kb/s, 25 fps, 25 tbr, 600 tbn, 1200 tbc (default)
  
  03-21 13:06:05.832 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Metadata:
  
  03-21 13:06:05.832 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      creation_time   : 2017-02-28 04:56:18
  
  03-21 13:06:05.832 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      handler_name    : Core Media Video
  
  03-21 13:06:05.832 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #2:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 81 kb/s (default)
  
  03-21 13:06:05.832 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Metadata:
  
  03-21 13:06:05.833 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      creation_time   : 2017-02-28 04:56:18
  
  03-21 13:06:05.833 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      handler_name    : Core Media Audio
  
  03-21 13:06:05.849 26112-26112/com.karandeepEnact I/System.out: --onProgress-->Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid3.mp4':
  
  03-21 13:06:05.868 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Metadata:
  
  03-21 13:06:05.869 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    major_brand     : mp42
  
  03-21 13:06:05.869 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    minor_version   : 0
  
  03-21 13:06:05.869 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    compatible_brands: mp42isom
  
  03-21 13:06:05.869 26112-26112/com.karandeepEnact I/System.out: --onProgress-->  Duration: 00:00:31.40, start: 0.000000, bitrate: 1771 kb/s
  
  03-21 13:06:05.869 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #3:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 640x368, 1644 kb/s, 30.04 fps, 30.04 tbr, 30041 tbn, 60082 tbc (default)
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Metadata:
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      rotate          : 90
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Side data:
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->      displaymatrix: rotation of -90.00 degrees
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->    Stream #3:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->[Parsed_setdar_1 @ 0xad6aa1c0] Media type mismatch between the 'Parsed_setdar_1' filter output pad 0 (video) and the 'Parsed_concat_4' filter input pad 1 (audio)
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->[AVFilterGraph @ 0xad697180] Cannot create the link setdar:0 -> concat:1
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->Error initializing complex filters.
  
  03-21 13:06:05.870 26112-26112/com.karandeepEnact I/System.out: --onProgress-->Invalid argument
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out: --onFailure-->ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   built with gcc 4.8 (GCC)
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libavutil      55. 17.103 / 55. 17.103
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libavcodec     57. 24.102 / 57. 24.102
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libavformat    57. 25.100 / 57. 25.100
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libavdevice    57.  0.101 / 57.  0.101
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libavfilter     6. 31.100 /  6. 31.100
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libswscale      4.  0.100 /  4.  0.100
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libswresample   2.  0.101 /  2.  0.101
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   libpostproc    54.  0.100 / 54.  0.100
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid.mp4':
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   Metadata:
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     major_brand     : isom
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     minor_version   : 512
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     compatible_brands: isomiso2avc1mp41
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     title           : 1282287935171187
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     encoder         : Lavf56.40.101
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:   Duration: 00:12:11.52, start: 0.169000, bitrate: 292 kb/s
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 400x400, 268 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     Metadata:
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:       handler_name    : VideoHandler
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     Stream #0:1(und): Audio: aac (HE-AACv2) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 19 kb/s (default)
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:     Metadata:
  
  03-21 13:06:05.871 26112-26112/com.karandeepEnact I/System.out:       handler_name    : SoundHandler
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out: [mov,mp4,m4a,3gp,3g2,mj2 @ 0xad6b9600] sample aspect ratio already set to 1:1, ignoring 'pasp' atom (65536:65536)
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out: Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid1.mp4':
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:   Metadata:
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     major_brand     : mp42
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     minor_version   : 0
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     compatible_brands: isommp42
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     creation_time   : 2017-03-20 09:36:26
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     com.android.version: 7.0
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:   Duration: 00:00:09.47, start: 0.000000, bitrate: 6138 kb/s
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     Stream #1:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 720x480, 6004 kb/s, SAR 1:1 DAR 3:2, 29.99 fps, 30 tbr, 90k tbn, 180k tbc (default)
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     Metadata:
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:       rotate          : 90
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:       creation_time   : 2017-03-20 09:36:26
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:       handler_name    : VideoHandle
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     Side data:
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:       displaymatrix: rotation of -90.00 degrees
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     Metadata:
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:       creation_time   : 2017-03-20 09:36:26
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:       handler_name    : SoundHandle
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out: Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid2.mp4':
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:   Metadata:
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     major_brand     : mp42
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     minor_version   : 1
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     compatible_brands: mp41mp42isom
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:     creation_time   : 2017-02-28 04:56:18
  
  03-21 13:06:05.872 26112-26112/com.karandeepEnact I/System.out:   Duration: 00:00:30.87, start: 0.000000, bitrate: 568 kb/s
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 400x400, 482 kb/s, 25 fps, 25 tbr, 600 tbn, 1200 tbc (default)
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Metadata:
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:       creation_time   : 2017-02-28 04:56:18
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:       handler_name    : Core Media Video
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Stream #2:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 81 kb/s (default)
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Metadata:
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:       creation_time   : 2017-02-28 04:56:18
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:       handler_name    : Core Media Audio
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out: Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/vid3.mp4':
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:   Metadata:
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     major_brand     : mp42
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     minor_version   : 0
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     compatible_brands: mp42isom
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:   Duration: 00:00:31.40, start: 0.000000, bitrate: 1771 kb/s
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Stream #3:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 640x368, 1644 kb/s, 30.04 fps, 30.04 tbr, 30041 tbn, 60082 tbc (default)
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Metadata:
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:       rotate          : 90
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Side data:
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:       displaymatrix: rotation of -90.00 degrees
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out:     Stream #3:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out: [Parsed_setdar_1 @ 0xad6aa1c0] Media type mismatch between the 'Parsed_setdar_1' filter output pad 0 (video) and the 'Parsed_concat_4' filter input pad 1 (audio)
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out: [AVFilterGraph @ 0xad697180] Cannot create the link setdar:0 -> concat:1
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out: Error initializing complex filters.
  
  03-21 13:06:05.873 26112-26112/com.karandeepEnact I/System.out: Invalid argument
  
  03-21 13:06:05.874 26112-26112/com.karandeepEnact I/System.out: --onFinish-->
  
  03-21 13:08:12.360 26112-26120/com.karandeepEnact I/art: Debugger is no longer active
  
  03-21 13:08:12.360 26112-26120/com.karandeepEnact I/art: Starting a blocking GC Instrumentation