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• What is data anonymization in web analytics ?

  11 février 2020, par Joselyn Khor — Analytics Tips, Privacy
  Collecting information via web analytics platforms is needed to help a website grow and improve. When doing so, it’s best to strike a balance between getting valuable insights, and keeping the trust of your users by protecting their privacy.

  This means not collecting or processing any personally identifiable information (PII). But what if your organisation requires you to collect PII ?

  That’s where data anonymization comes in.

  

  What is data anonymization ?

  Data anonymization makes identifiable information unidentifiable. This is done through data processing techniques which remove or modify PII data. So data becomes anonymous and can’t be linked to any individual.

  In the context of web analytics, data anonymization is handy because you can collect useful data while protecting the privacy of website visitors.

  Why is data anonymization important ?

  Through modern threats of identity theft, credit card fraud and the like, data anonymization is a way to protect the identity and privacy of individuals. As well as protect private and sensitive information of organisations. 

  Data anonymization lets you follow the many laws around the world which protect user privacy. These laws provide safeguards around collecting personal data or personally identifiable information (PII), so data anonymization is a good solution to ensure you’re not processing such sensitive information.

  In some cases, implementing data anonymization techniques means you can avoid having to show your users a consent screen. Which means you may not need to ask for consent in order to track data. This is a bonus as consent screens can annoy and stop people from engaging with your site.

  GDPR and data anonymization

  

  The GDPR is a law in the EU that limits the collection and processing of personal data. The aim is to give people more control over their online personal information. Which is why website owners need to follow certain rules to become GDPR compliant and protect user privacy. According to the GDPR, you can be fined up to 4% of your yearly revenue for data breaches or non-compliance. 

  In the case of web analytics, tools can be easily made compliant by following a number of steps. 

  This is why anonymizing data is a big deal.

  Anonymized data isn’t personal data according to the GDPR : 

  “The principles of data protection should therefore not apply to anonymous information, namely information which does not relate to an identified or identifiable natural person or to personal data rendered anonymous in such a manner that the data subject is not or no longer identifiable.”

  This means, you still get the best of both worlds. By anonymizing data, you’re still able to collect useful information like visitor behavioural data.

  US privacy laws and data anonymization

  In the US, there isn’t one single law that governs the protection of personal data, called personally identifiable information (PII). There are hundreds of federal and state laws that protect the personal data of US residents. As well as, industry-specific statutes related to data privacy, like the California Consumer Privacy Act (CCPA) and the Health Insurance Portability and Accountability Act (HIPAA).

  Website owners in the US need to know exactly what laws govern their area of business in order to follow them.

  A general guideline is to protect user privacy regardless of whether you are or aren’t allowed to collect PII. This means anonymizing identifiable information so your website users aren’t put at risk.

  Data anonymization techniques in Matomo Analytics

  If you carry these out, you won’t need to ask your website visitors for tracking consent since anonymized data is no longer considered personal data under the GDPR.

  • Anonymize previously tracked raw data – like visitors/visits
  • Anonymize Visitor IP addresses
  • Anonymize geo-location information (country, region, city)
  • Pseudonymize User ID ( if you don’t want this data to land on your Matomo server, the solution is simply to not set the User ID. Then Matomo will use the normal anonymized IDs)
  • Data can also be anonymized before it’s even sent to Matomo
  • Learn how to further configure privacy settings in a web analytics tool like Matomo
  • 11 ways Matomo Analytics helps you to protect your visitors privacy

  The techniques listed above make it easy for you when using a tool like Matomo, as they are automatically anonymized.

  Tools like Google Analytics on the other hand don’t provide some of the privacy options and leave it up to you to take on the burden of implementation without providing steps.

  Data anonymization tools

  If you’re a website owner who wants to grow your business or learn more about your website visitors, privacy-friendly tools like Matomo Analytics are a great option. By following the easy steps to be GDPR compliant, you can anonymize all data that could put your visitors at risk.

• Pass camera input to ffmpeg

  30 mai 2017, par Sachin Sonone

  I am trying to develop an delphi app which will show a preview of the camera in the delphi form and then send the frames of video as images to the ffmpeg in the stdin of ffmpeg. ffmpeg then broadcast the video to wowza server over rtmp. but fmpeg gives an error ’pipe:0 Bad file descriptor’

      FFMPEG command:
  
      ffmpeg -f image2pipe -i pipe:0  -c:v libx264 -y -report -f flv wowza_url

  I followed this https://msdn.microsoft.com/en-us/library/ms682499(VS.85).aspx article to build the parent app which will open ffmpeg as a child and use FFmpeg’s stdin to pass input

     // Create a pipe for the child process's STDOUT.
  
  Createpipe(STDOut_ReadPipe, STDOut_WritePipe, @Security,0);
  
  
  
    // Ensure the read handle to the pipe for STDOUT is not inherited.
  
  SetHandleInformation(STDOut_ReadPipe,HANDLE_FLAG_INHERIT,0);
  
  
  
  // Create a pipe for the child process's STDIN.
  
  
  
  if (  CreatePipe(STDIn_ReadPipe , STDIn_WritePipe, @Security, 0) = true) then
  
  
  
  
  
  // Ensure the write handle to the pipe for STDIN is not inherited.
  
  
  
  SetHandleInformation(STDIn_WritePipe, HANDLE_FLAG_INHERIT, 0)  ;

  This the code to start ffmpeg process

  FillChar(StartupInfo,Sizeof(StartupInfo),0);
  
  StartupInfo.cb := Sizeof(StartupInfo);
  
  StartupInfo.dwFlags := STARTF_USESTDHANDLES;
  
  
  
  
  
  StartupInfo.wShowWindow := 1;
  
  S := args;
  
  UniqueString(S);
  
  
  
  StartupInfo.hStdError := STDOut_WritePipe;
  
  StartupInfo.hStdOutput := STDOut_WritePipe;
  
  StartupInfo.hStdInput := STDIn_ReadPipe;

  but as soon as program start ffmpeg exits with the error.

  This is the full console log of the ffmpeg

  ffmpeg started on 2017-05-30 at 18:45:36
  
  Report written to "ffmpeg-20170530-184536.log"
  
  Command line:
  
  "ffmpeg.exe" -f image2pipe -i pipe:0 -report -movflags +faststart -tune 
  
  zerolatency -an -pix_fmt yuv420p -preset ultrafast -vcodec libx264 -b:v 250k 
  
  -y -f flv test.flv
  
  ffmpeg version N-85750-ga75ef15 Copyright (c) 2000-2017 the FFmpeg 
  
  developers
  
   built with gcc 6.3.0 (GCC)
  
   configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid 
  
  --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-
  
  avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls 
  
  --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-
  
   libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-
  
    libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb 
  
    --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --
  
   enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --
  
    enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab 
  
   --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-
  
       libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-
  
     libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 61.100 / 55. 61.100
  
    libavcodec     57. 93.100 / 57. 93.100
  
    libavformat    57. 72.101 / 57. 72.101
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 88.100 /  6. 88.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
    Splitting the commandline.
  
     Reading option '-f' ... matched as option 'f' (force format) with 
  
      argument 'image2pipe'.
  
     Reading option '-i' ... matched as input url with argument 'pipe:0'.
  
    Reading option '-report' ... matched as option 'report' (generate a 
  
    report) with argument '1'.
  
    Reading option '-movflags' ... matched as AVOption 'movflags' with 
  
    argument '+faststart'.
  
    Reading option '-tune' ... matched as AVOption 'tune' with argument 
  
    'zerolatency'.
  
     Reading option '-an' ... matched as option 'an' (disable audio) with 
  
     argument '1'.
  
     Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel 
  
     format) 
  
    with argument 'yuv420p'.
  
   Reading option '-preset' ... matched as AVOption 'preset' with argument 
  
   'ultrafast'.
  
   Reading option '-vcodec' ... matched as option 'vcodec' (force video codec 
  
  ('copy' to copy stream)) with argument 'libx264'.
  
    Reading option '-b:v' ... matched as option 'b' (video bitrate (please use -
  
   b:v)) with argument '250k'.
  
    Reading option '-y' ... matched as option 'y' (overwrite output files) 
  
   with 
  
   argument '1'.
  
   Reading option '-f' ... matched as option 'f' (force format) with argument 
  
  'flv'.
  
  Reading option 'test.flv' ... matched as output url.
  
   Finished splitting the commandline.
  
   Parsing a group of options: global .
  
    Applying option report (generate a report) with argument 1.
  
   Applying option y (overwrite output files) with argument 1.
  
   Successfully parsed a group of options.
  
   Parsing a group of options: input url pipe:0.
  
   Applying option f (force format) with argument image2pipe.
  
    Successfully parsed a group of options.
  
   Opening an input file: pipe:0.
  
   [pipe @ 003bdea0] Setting default whitelist 'crypto'
  
   [AVIOContext @ 03115e60] Statistics: 0 bytes read, 0 seeks
  
   pipe:0: Bad file descriptor'

• | NGINX | FFMPEG not creating DASH manifests or chunks in the designated DIR |

  7 avril 2020, par Mathew Knight

  Hopefully someone can help here, I have a setup that takes two input RTMP streams from two separate machines into my server. From here I am trying to serve some MPEG DASH manifests and chunks to an experimental spatial audio/360 web (.js) player.

  



  My issue is that while i can see the FFMPEG processes running and creating the Chunks the files themselves are not appearing in the specified folder and so the media player will not read the content.

  



  Is there something obvious that i am not doing that is preventing these files being written ?

  



  Any help with this would be amazing !!!

  



  Here is my config :

  



  #user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
    worker_connections 768;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    # server_tokens off;

    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    ##
    # SSL Settings
    ##

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
    ssl_prefer_server_ciphers on;

    ##
    # Logging Settings
    ##

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;


    ##
    # Virtual Host Configs
    ##

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;

}

rtmp {
        server {
            listen 1935;
            chunk_size 4096;

            application live {
            live on;
            record off;
            interleave off;
            wait_key on;
            meta on;
            wait_video off;
            idle_streams off;
            sync 300ms;
            session_relay on;
            #allow publish 127.0.0.1;
            #allow publish 192.168.2.0/24;
            allow publish all;
            #deny publish all;
            allow play all;    

         dash on;
            dash_nested on;
            dash_path /tmp/dash;
            dash_fragment 3;
            dash_playlist_length 120;
            dash_cleanup on;

            #dash_clock_compensation http_head;
            #dash_clock_helper_uri https://localhost/time;

    #dash_variant _low   bandwidth="500000"  width="640"  height="360";
            #dash_variant _med  bandwidth="1500000" width="1280"  height="720";
            #dash_variant _high bandwidth="5000000" width="1920" height="1080" max;

            # EDIT THESE SO THE LIVESTREAM_KEY IS REPLACED BY YOUR PERSONAL KEY THAT YOU CAN LOOK UP ON THE SITE OF THE PLATFORM
            # push rtmp://live-ams.twitch.tv/app/LIVESTREAM_KEY;
            # push rtmp://a.rtmp.youtube.com/live2/LIVESTREAM_KEY;
            # push rtmp://ingest-ams.mixer.com:1935/beam/LIVESTREAM_KEY;

         exec_push ffmpeg -re -an -i 'rtmp://localhost:1935/live/stream' -c:v libx264 -preset veryfast -s 1920x1080 -bufsize 15000k -b:v 15000k -keyint_min 150 -g 150 -tile-columns 4 -frame-parallel 1 -an -f dash -init_seg_name 'init-stream$RepresentationID$_video.webm' -media_seg_name 'chunk-stream$RepresentationID$_video-$Number%05d$.webm' 'http://localhost:1935/dash/video.mpd' 2>>/var/log/nginx/ffmpegvideo.log;




            }



    application dash {
        #TRANSCODED VIDEO/AUDIO FROM FFMPEG COMES HERE?????
        live on;
        meta copy;

        record all;
        record_path /rec;
        }

        }


    server {
            listen 1936;
            chunk_size 4096;

            application live {
            live on;
            record off;
            interleave off;
            wait_key on;
            meta on;
            wait_video off;
            idle_streams off;
            sync 300ms;
            session_relay on;
            #allow publish 127.0.0.1;
            #allow publish 192.168.2.0/24;
            allow publish all;
            #deny publish all;
            allow play all;    


            # EDIT THESE SO THE LIVESTREAM_KEY IS REPLACED BY YOUR PERSONAL KEY THAT YOU CAN LOOK UP ON THE SITE OF THE PLATFORM
            # push rtmp://live-ams.twitch.tv/app/LIVESTREAM_KEY;
            # push rtmp://a.rtmp.youtube.com/live2/LIVESTREAM_KEY;
            # push rtmp://ingest-ams.mixer.com:1935/beam/LIVESTREAM_KEY;

    exec_push ffmpeg -re -i 'rtmp://localhost:1936/live/stream' -filter 'channelmap=0|1|2|3|4|5|6|7:' -c:a libopus -b:a 512k -vn -f dash -init_seg_name 'init-stream$RepresentationID$_audio_01-08ch.webm' -media_seg_name 'chunk-stream$RepresentationID$_audio_01-08ch-$Number%05d$.webm' 'http://localhost:1936/dash/audio_01-08ch.mpd' -filter 'channelmap=8|9|10|11|12|13|14|15:' -c:a libopus -b:a 512k -vn -f dash -init_seg_name 'init-stream$RepresentationID$_audio_09-16ch.webm' -media_seg_name 'chunk-stream$RepresentationID$_audio_09-16ch-$Number%05d$.webm' 'http://localhost:1936/dash/audio_09-16ch.mpd' 2>>/var/log/nginx/ffmpegaudio.log;
            }





    application dash {
        #TRANSCODED AUDIO FROM FFMPEG COMES HERE?????
        live on;
        meta copy;
        }


}
}


  



  and here is the output from my FFMPEG logs :

  



  AUDIO :

  



  ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --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-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --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-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  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
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[aac @ 0x55bfeaaafc60] Channel layout 'stereo' with 2 channels does not match specified number of channels 16: ignoring specified channel layout
Guessed Channel Layout for Input Stream #0.0 : hexadecagonal
Input #0, flv, from 'rtmp://localhost:1936/live/stream':
  Metadata:
    Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
    displayWidth    : 0
    displayHeight   : 0
    fps             : 0
    profile         : 
    level           : 
  Duration: 00:00:00.00, start: 0.042000, bitrate: N/A
    Stream #0:0: Audio: aac (LC), 48000 Hz, hexadecagonal, fltp, 512 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> opus (libopus))
  Stream #0:0 -> #1:0 (aac (native) -> opus (libopus))
Press [q] to stop, [?] for help
[dash @ 0x55bfeaab43e0] Opening 'http://localhost:1936/dash/init-stream_audio_01-08ch.webm' for writing
Output #0, dash, to 'http://localhost:1936/dash/audio_01-08ch.mpd':
  Metadata:
    Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
    displayWidth    : 0
    displayHeight   : 0
    fps             : 0
    profile         : 
    level           : 
    encoder         : Lavf57.83.100
    Stream #0:0: Audio: opus (libopus), 48000 Hz, 7.1, flt, 512 kb/s
    Metadata:
      encoder         : Lavc57.107.100 libopus
[dash @ 0x55bfeaab43e0] Cannot use rename on non file protocol, this may lead to races and temporary partial files
[dash @ 0x55bfeaaecb00] Opening 'http://localhost:1936/dash/init-stream_audio_09-16ch.webm' for writing
Output #1, dash, to 'http://localhost:1936/dash/audio_09-16ch.mpd':
  Metadata:
    Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
    displayWidth    : 0
    displayHeight   : 0
    fps             : 0
    profile         : 
    level           : 
    encoder         : Lavf57.83.100
    Stream #1:0: Audio: opus (libopus), 48000 Hz, 7.1, flt, 512 kb/s
    Metadata:
      encoder         : Lavc57.107.100 libopus
size=N/A time=00:00:00.49 bitrate=N/A speed=0.986x    
size=N/A time=00:00:01.01 bitrate=N/A speed=1.01x    
size=N/A time=00:00:01.49 bitrate=N/A speed=0.993x    
size=N/A time=00:00:02.01 bitrate=N/A speed=   1x    
size=N/A time=00:00:02.49 bitrate=N/A speed=0.995x    
size=N/A time=00:00:03.01 bitrate=N/A speed=   1x    
size=N/A time=00:00:03.53 bitrate=N/A speed=   1x    
size=N/A time=00:00:04.01 bitrate=N/A speed=0.998x    
size=N/A time=00:00:04.53 bitrate=N/A speed=   1x    
[dash @ 0x55bfeaab43e0] Opening 'http://localhost:1936/dash/chunk-stream_audio_01-08ch-%05d.webm' for writing
[dash @ 0x55bfeaaecb00] Opening 'http://localhost:1936/dash/chunk-stream_audio_09-16ch-%05d.webm' for writing
size=N/A time=00:00:05.01 bitrate=N/A speed=0.997x    
size=N/A time=00:00:05.53 bitrate=N/A speed=   1x    
size=N/A time=00:00:06.03 bitrate=N/A speed=0.999x    
size=N/A time=00:00:06.55 bitrate=N/A speed=   1x    
size=N/A time=00:00:07.05 bitrate=N/A speed=0.999x    
size=N/A time=00:00:07.55 bitrate=N/A speed=0.999x    
size=N/A time=00:00:08.07 bitrate=N/A speed=   1x    
size=N/A time=00:00:08.57 bitrate=N/A speed=   1x    
size=N/A time=00:00:09.09 bitrate=N/A speed=   1x    
size=N/A time=00:00:09.59 bitrate=N/A speed=   1x    
[dash @ 0x55bfeaab43e0] Opening 'http://localhost:1936/dash/chunk-stream_audio_01-08ch-%05d.webm' for writing
[dash @ 0x55bfeaaecb00] Opening 'http://localhost:1936/dash/chunk-stream_audio_09-16ch-%05d.webm' for writing
size=N/A time=00:00:10.09 bitrate=N/A speed=0.999x    
size=N/A time=00:00:10.61 bitrate=N/A speed=   1x    
size=N/A time=00:00:11.09 bitrate=N/A speed=0.999x    
size=N/A time=00:00:11.61 bitrate=N/A speed=   1x    
size=N/A time=00:00:12.11 bitrate=N/A speed=0.999x    
size=N/A time=00:00:12.63 bitrate=N/A speed=   1x    
size=N/A time=00:00:13.13 bitrate=N/A speed=   1x    
size=N/A time=00:00:13.63 bitrate=N/A speed=0.999x    
size=N/A time=00:00:14.15 bitrate=N/A speed=   1x    
size=N/A time=00:00:14.63 bitrate=N/A speed=0.999x    
[dash @ 0x55bfeaab43e0] Opening 'http://localhost:1936/dash/chunk-stream_audio_01-08ch-%05d.webm' for writing
[dash @ 0x55bfeaaecb00] Opening 'http://localhost:1936/dash/chunk-stream_audio_09-16ch-%05d.webm' for writing
size=N/A time=00:00:15.15 bitrate=N/A speed=   1x    
size=N/A time=00:00:15.67 bitrate=N/A speed=   1x    
size=N/A time=00:00:16.15 bitrate=N/A speed=0.999x    
size=N/A time=00:00:16.67 bitrate=N/A speed=   1x    
size=N/A time=00:00:17.15 bitrate=N/A speed=0.999x    
size=N/A time=00:00:17.67 bitrate=N/A speed=   1x    
size=N/A time=00:00:18.17 bitrate=N/A speed=   1x    
size=N/A time=00:00:18.67 bitrate=N/A speed=0.999x    
size=N/A time=00:00:19.19 bitrate=N/A speed=   1x    
size=N/A time=00:00:19.69 bitrate=N/A speed=   1x    
[dash @ 0x55bfeaab43e0] Opening 'http://localhost:1936/dash/chunk-stream_audio_01-08ch-%05d.webm' for writing
[dash @ 0x55bfeaaecb00] Opening 'http://localhost:1936/dash/chunk-stream_audio_09-16ch-%05d.webm' for writing



  



  VIDEO :

  



  ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --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-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --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-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  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
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, flv, from 'rtmp://localhost:1935/live/stream':
  Metadata:
    Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
    displayWidth    : 3840
    displayHeight   : 1920
    fps             : 30
    profile         : 
    level           : 
  Duration: 00:00:00.00, start: 0.033000, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p(tv, bt470bg/bt709/bt709, progressive), 3840x1920 [SAR 1:1 DAR 2:1], 15360 kb/s, 30 fps, 30 tbr, 1k tbn, 60 tbc
    Stream #0:1: Audio: aac (LC), 48000 Hz, 7.1, fltp, 327 kb/s
Codec AVOption tile-columns (Number of tile columns to use, log2) specified for output file #0 (http://localhost:1935/dash/video.mpd) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Codec AVOption frame-parallel (Enable frame parallel decodability features) specified for output file #0 (http://localhost:1935/dash/video.mpd) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x55e24ea47f40] VBV maxrate unspecified, assuming CBR
[libx264 @ 0x55e24ea47f40] using SAR=9/8
[libx264 @ 0x55e24ea47f40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x55e24ea47f40] profile High, level 4.0
[libx264 @ 0x55e24ea47f40] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 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=1 keyint=150 keyint_min=76 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=cbr mbtree=1 bitrate=15000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=15000 vbv_bufsize=15000 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/init-stream_video.webm' for writing
Output #0, dash, to 'http://localhost:1935/dash/video.mpd':
  Metadata:
    Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
    displayWidth    : 3840
    displayHeight   : 1920
    fps             : 30
    profile         : 
    level           : 
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (libx264), yuv420p, 1920x1080 [SAR 9:8 DAR 2:1], q=-1--1, 15000 kb/s, 30 fps, 15360 tbn, 30 tbc
    Metadata:
      encoder         : Lavc57.107.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/15000000 buffer size: 15000000 vbv_delay: -1
frame=   11 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed=   0x    
[dash @ 0x55e24ea4b640] Cannot use rename on non file protocol, this may lead to races and temporary partial files
frame=   26 fps= 26 q=19.0 size=N/A time=00:00:00.10 bitrate=N/A speed=0.0997x    
frame=   42 fps= 28 q=17.0 size=N/A time=00:00:00.63 bitrate=N/A speed=0.421x    
frame=   57 fps= 28 q=14.0 size=N/A time=00:00:01.13 bitrate=N/A speed=0.565x    
frame=   72 fps= 29 q=15.0 size=N/A time=00:00:01.63 bitrate=N/A speed=0.65x    
frame=   87 fps= 29 q=14.0 size=N/A time=00:00:02.13 bitrate=N/A speed=0.706x    
frame=  102 fps= 29 q=16.0 size=N/A time=00:00:02.63 bitrate=N/A speed=0.746x    
frame=  118 fps= 29 q=16.0 size=N/A time=00:00:03.16 bitrate=N/A speed=0.785x    
frame=  133 fps= 29 q=17.0 size=N/A time=00:00:03.66 bitrate=N/A speed=0.807x    
frame=  148 fps= 29 q=15.0 size=N/A time=00:00:04.16 bitrate=N/A speed=0.826x    
frame=  163 fps= 29 q=18.0 size=N/A time=00:00:04.66 bitrate=N/A speed=0.841x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing
frame=  178 fps= 29 q=17.0 size=N/A time=00:00:05.16 bitrate=N/A speed=0.854x    
frame=  193 fps= 29 q=18.0 size=N/A time=00:00:05.66 bitrate=N/A speed=0.864x    
frame=  208 fps= 29 q=15.0 size=N/A time=00:00:06.16 bitrate=N/A speed=0.873x    
frame=  224 fps= 30 q=15.0 size=N/A time=00:00:06.70 bitrate=N/A speed=0.885x    
frame=  239 fps= 30 q=16.0 size=N/A time=00:00:07.20 bitrate=N/A speed=0.892x    
frame=  254 fps= 30 q=15.0 size=N/A time=00:00:07.70 bitrate=N/A speed=0.898x    
frame=  269 fps= 30 q=17.0 size=N/A time=00:00:08.20 bitrate=N/A speed=0.903x    
frame=  284 fps= 30 q=16.0 size=N/A time=00:00:08.70 bitrate=N/A speed=0.908x    
frame=  299 fps= 30 q=16.0 size=N/A time=00:00:09.20 bitrate=N/A speed=0.912x    
frame=  314 fps= 30 q=18.0 size=N/A time=00:00:09.70 bitrate=N/A speed=0.916x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing
frame=  330 fps= 30 q=17.0 size=N/A time=00:00:10.23 bitrate=N/A speed=0.922x    
frame=  345 fps= 30 q=17.0 size=N/A time=00:00:10.73 bitrate=N/A speed=0.925x    
frame=  360 fps= 30 q=15.0 size=N/A time=00:00:11.23 bitrate=N/A speed=0.928x    
frame=  375 fps= 30 q=15.0 size=N/A time=00:00:11.73 bitrate=N/A speed=0.931x    
frame=  390 fps= 30 q=16.0 size=N/A time=00:00:12.23 bitrate=N/A speed=0.933x    
frame=  405 fps= 30 q=17.0 size=N/A time=00:00:12.73 bitrate=N/A speed=0.935x    
frame=  420 fps= 30 q=14.0 size=N/A time=00:00:13.23 bitrate=N/A speed=0.937x    
frame=  435 fps= 30 q=16.0 size=N/A time=00:00:13.73 bitrate=N/A speed=0.94x    
frame=  450 fps= 30 q=16.0 size=N/A time=00:00:14.23 bitrate=N/A speed=0.941x    
frame=  465 fps= 30 q=18.0 size=N/A time=00:00:14.73 bitrate=N/A speed=0.943x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing
frame=  481 fps= 30 q=16.0 size=N/A time=00:00:15.26 bitrate=N/A speed=0.946x    
frame=  496 fps= 30 q=17.0 size=N/A time=00:00:15.76 bitrate=N/A speed=0.947x    
frame=  511 fps= 30 q=16.0 size=N/A time=00:00:16.26 bitrate=N/A speed=0.949x    
frame=  526 fps= 30 q=16.0 size=N/A time=00:00:16.76 bitrate=N/A speed=0.95x    
frame=  541 fps= 30 q=16.0 size=N/A time=00:00:17.26 bitrate=N/A speed=0.951x    
frame=  557 fps= 30 q=16.0 size=N/A time=00:00:17.80 bitrate=N/A speed=0.953x    
frame=  572 fps= 30 q=15.0 size=N/A time=00:00:18.30 bitrate=N/A speed=0.954x    
frame=  587 fps= 30 q=16.0 size=N/A time=00:00:18.80 bitrate=N/A speed=0.955x    
frame=  602 fps= 30 q=16.0 size=N/A time=00:00:19.30 bitrate=N/A speed=0.956x    
frame=  618 fps= 30 q=18.0 size=N/A time=00:00:19.83 bitrate=N/A speed=0.958x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing
frame=  633 fps= 30 q=17.0 size=N/A time=00:00:20.33 bitrate=N/A speed=0.959x    
frame=  648 fps= 30 q=16.0 size=N/A time=00:00:20.83 bitrate=N/A speed=0.96x    
frame=  663 fps= 30 q=16.0 size=N/A time=00:00:21.33 bitrate=N/A speed=0.961x    
frame=  678 fps= 30 q=16.0 size=N/A time=00:00:21.83 bitrate=N/A speed=0.961x    
frame=  693 fps= 30 q=16.0 size=N/A time=00:00:22.33 bitrate=N/A speed=0.962x    
frame=  708 fps= 30 q=16.0 size=N/A time=00:00:22.83 bitrate=N/A speed=0.962x    
frame=  723 fps= 30 q=17.0 size=N/A time=00:00:23.33 bitrate=N/A speed=0.963x    
frame=  739 fps= 30 q=17.0 size=N/A time=00:00:23.86 bitrate=N/A speed=0.965x    
frame=  754 fps= 30 q=16.0 size=N/A time=00:00:24.36 bitrate=N/A speed=0.965x    
frame=  769 fps= 30 q=18.0 size=N/A time=00:00:24.86 bitrate=N/A speed=0.966x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing
frame=  784 fps= 30 q=15.0 size=N/A time=00:00:25.36 bitrate=N/A speed=0.966x    
frame=  799 fps= 30 q=15.0 size=N/A time=00:00:25.86 bitrate=N/A speed=0.967x    
frame=  814 fps= 30 q=15.0 size=N/A time=00:00:26.36 bitrate=N/A speed=0.967x    
frame=  829 fps= 30 q=16.0 size=N/A time=00:00:26.86 bitrate=N/A speed=0.968x    
frame=  844 fps= 30 q=15.0 size=N/A time=00:00:27.36 bitrate=N/A speed=0.968x    
frame=  860 fps= 30 q=15.0 size=N/A time=00:00:27.90 bitrate=N/A speed=0.97x    
frame=  875 fps= 30 q=15.0 size=N/A time=00:00:28.40 bitrate=N/A speed=0.97x    
frame=  890 fps= 30 q=15.0 size=N/A time=00:00:28.90 bitrate=N/A speed=0.971x    
frame=  905 fps= 30 q=16.0 size=N/A time=00:00:29.40 bitrate=N/A speed=0.971x    
frame=  920 fps= 30 q=18.0 size=N/A time=00:00:29.90 bitrate=N/A speed=0.971x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing
frame=  935 fps= 30 q=16.0 size=N/A time=00:00:30.40 bitrate=N/A speed=0.971x    
frame=  950 fps= 30 q=16.0 size=N/A time=00:00:30.90 bitrate=N/A speed=0.972x    
frame=  966 fps= 30 q=15.0 size=N/A time=00:00:31.43 bitrate=N/A speed=0.973x    
frame=  981 fps= 30 q=15.0 size=N/A time=00:00:31.93 bitrate=N/A speed=0.973x    
frame=  996 fps= 30 q=16.0 size=N/A time=00:00:32.43 bitrate=N/A speed=0.974x    
frame= 1011 fps= 30 q=15.0 size=N/A time=00:00:32.93 bitrate=N/A speed=0.974x    
frame= 1026 fps= 30 q=16.0 size=N/A time=00:00:33.43 bitrate=N/A speed=0.974x    
frame= 1041 fps= 30 q=16.0 size=N/A time=00:00:33.93 bitrate=N/A speed=0.974x    
frame= 1057 fps= 30 q=16.0 size=N/A time=00:00:34.46 bitrate=N/A speed=0.975x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing
frame= 1072 fps= 30 q=18.0 size=N/A time=00:00:34.96 bitrate=N/A speed=0.976x    
frame= 1087 fps= 30 q=18.0 size=N/A time=00:00:35.46 bitrate=N/A speed=0.976x    
frame= 1102 fps= 30 q=15.0 size=N/A time=00:00:35.96 bitrate=N/A speed=0.976x    
frame= 1117 fps= 30 q=15.0 size=N/A time=00:00:36.46 bitrate=N/A speed=0.976x    
frame= 1132 fps= 30 q=16.0 size=N/A time=00:00:36.96 bitrate=N/A speed=0.976x    
frame= 1148 fps= 30 q=16.0 size=N/A time=00:00:37.50 bitrate=N/A speed=0.977x    
frame= 1163 fps= 30 q=17.0 size=N/A time=00:00:38.00 bitrate=N/A speed=0.978x    
frame= 1178 fps= 30 q=15.0 size=N/A time=00:00:38.50 bitrate=N/A speed=0.978x    
frame= 1193 fps= 30 q=15.0 size=N/A time=00:00:39.00 bitrate=N/A speed=0.978x    
frame= 1208 fps= 30 q=18.0 size=N/A time=00:00:39.50 bitrate=N/A speed=0.978x    
[dash @ 0x55e24ea4b640] Opening 'http://localhost:1935/dash/chunk-stream_video-%05d.webm' for writing