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• Why DASH video fragments are not reproducible nor readable with ffmpeg ?

  21 mai 2020, par salgarji

  I'm streaming live video using DASH through FFmpeg. Everything's OK, fragments are generated, and the mpd file, but I wanted to have reproducible independent fragments. Video players won't open those fragments. I guess it's because they are mpd file dependant. My question would be : can those fragments be generated in a way that they are reproducible ? I don't know if it has something to do to the frames I P B or just the way dash cuts video information, in a way that it only saves 'timeline' on the mpd...

  



  My purpose is not only being able to reproduce them sepparately, but I need to insert information in a metadata tag of the video, and ffmpeg won't let me read those live streaming generated fragments.

  



  FFmpeg input information command will behave like this :

  



  input :

  



  ffmpeg -i /path/video0-0-1.mp4


  



  output :

  



  ffmpeg version N-97777-g3b5a36c56d Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 11.0.3 (clang-1103.0.32.59)
  configuration: --enable-gpl --enable-libx264
  libavutil      56. 45.100 / 56. 45.100
  libavcodec     58. 84.100 / 58. 84.100
  libavformat    58. 43.100 / 58. 43.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 81.100 /  7. 81.100
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb324009400] could not find corresponding track id 1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb324009400] could not find corresponding trex (id 1)
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb324009400] could not find corresponding track id 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb324009400] trun track id unknown, no tfhd was found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb324009400] error reading header
/path/video0-0-1.mp4: Invalid data found when processing input


  



  I execute this FFmpeg code using fluent-ffmpeg over JS to generate the fragments :

  



  var ffmpeg = require('fluent-ffmpeg');

var grabacion = new ffmpeg();

grabacion.addInput('0')
.inputOptions(['-y -nostdin', '-f avfoundation', '-video_size 1280x720', '-pix_fmt nv12', '-framerate 30'])
.outputOptions(['-vcodec libx264', '-keyint_min 0', '-g 100', '-map 0:v', '-b:v 1000k', '-f dash',
 '-use_template 1', '-use_timeline 0', '-init_seg_name video0-$RepresentationID$-$Number$.mp4',
 '-media_seg_name video0-$RepresentationID$-$Number$.mp4', '-remove_at_exit 0', '-window_size 20', '-seg_duration 4'])
.output('/path/path/path/video.mpd')
.run();


  



  So, the final purpose would be to be able to insert a tag like this :

  



  ffmpeg -i video0-0-0.mp4 -movflags use_metadata_tags -metadata sample_tag=whateveryouwanttoadd video0-0-0-tagged.mp4


  



  Is there any way to do it ? Thank you in advance !

  


• Matomo maker InnoCraft named 2023 Hi-Tech Awards finalist

  20 avril 2023, par Erin — Press Releases

  WELLINGTON, N.Z., April 20, 2023 – InnoCraft, the makers of world-leading open-source web analytics platform Matomo, has been named an ASX Hi-Tech Emerging Company of the Year finalist in the 2023 Hi-Tech Awards. 



  Matomo founder Matthieu Aubry says, “At Matomo, we believe in empowering individuals and organizations to make informed decisions about their digital presence. By providing an open-source website analytics platform, we have created a more transparent and trustworthy digital ecosystem. We are proud to be recognised as a finalist for the Hi-Tech Awards, and we will continue to work towards a more open and ethical digital landscape, and grow the business in New Zealand and worldwide.”



  About Matomo

  Matomo, launched in 2007 as an open-source, privacy-friendly Google Analytics alternative, is trusted by over 1.5 million websites in 220 countries and has been translated in over 50 languages. Matomo tracks and analyses online visits and traffic to give users a deeper understanding of their website visitors to drive conversions and revenue ; while keeping businesses compliant with privacy laws worldwide, such as the EU’s General Data Protection Regulation (GDPR) and The California Consumer Privacy Act (CCPA).

  Aubry says Matomo is performing extremely well internationally as consumers and organizations look for privacy-focused analytics solutions, with several European countries already ruling the use of Google Analytics illegal due to data transfers to the US. In addition, Matomo’s user increase was recognized earlier this year with W3Tech’s award for the best web analytics software in its Web Technologies of the Year 2022 – with previous winners including Google Analytics and Facebook Pixel.



  A record number of companies entered the 2023 Hi-Tech Awards, with entries coming in from across the country and from all areas of the Hi-Tech sector. This depth is reflected in the line-up of finalists this year, according to David Downs, Chair of the Hi-Tech Trust, who says the standard of entries continue to grow every year.

”

  The hi-tech sector continues to flourish and it’s fantastic to see the success that so many of our companies enjoy on the international stage. This sector continues to prove its resilience and is at the forefront of our export economy in turbulent times,” says Downs.



  The Hi-Tech Awards Gala Dinner will take place on Friday, the 23rd of June, in Christchurch. 


   

  &lt;script type=&quot;text/javascript&quot;&gt;<br />
console.log('script started!!!!');<br />
   var _paq = _paq || [];<br />
   _paq.push(['AbTesting::create', {<br />
       name: 'LanceTesting', // you can also use '18' (ID of the experiment) to hide the name<br />
       percentage: 100,<br />
       includedTargets: [{&quot;attribute&quot;:&quot;url&quot;,&quot;inverted&quot;:&quot;0&quot;,&quot;type&quot;:&quot;equals_simple&quot;,&quot;value&quot;:&quot;https:\/\/matomo.org\/blog\/2023\/01\/matomo-privacy-friendly-web-analytics-software-named-best-of-the-year-2022\/&quot;}],<br />
       excludedTargets: [],<br />
       variations: [<br />
           {<br />
               name: 'original',<br />
               activate: function (event) {<br />
                   // usually nothing needs to be done here<br />
                   console.log('group1');<br />
               }<br />
           },<br />
           {<br />
               name: 'Variation1', // you can also use '45' (ID of the variation) to hide the name<br />
               percentage: 90,<br />
               activate: function(event) {<br />
                   console.log('group2');<br />
                   event.redirect('https://matomo.org/blog/2023/08/matomo-named-2023-hi-tech-awards-finalist/');<br />
               }<br />
           }            <br />
       ],<br />
       trigger: function () {<br />
           return true; // here you can further customize which of your visitors will participate in this experiment<br />
       }<br />
   }]);<br />
&lt;/script&gt;

• How to "stream" images to ffmpeg to construct a video in .NET 6

  13 septembre 2021, par alkasel

  I'm using FFMPEG command line tool to create a video. As of now I retrive images from memory, but I'd like to avoid writing them to memory in first place and feed FFMPEG directly from memory.

  


  I tried accord-framework.net and it works very well, but now I've switched to .NET 6 and it is not supported (the functionality I used is based on AForge.Video.FFMPEG, an archived project not supporting recent frameworks).

  


  Now as I understand it is possible to have FFMPEG to work on streams instead of images saved on disk. In this post there is a very nice example of doing it in Python.

  


  However I don't know how to do this on .NET 6 using System.Diagnostics.Process : From this post I undestand that I could have FFMPEG take images from standard input using the syntax

  


  -i -


  


  The problem is that I cannot write on standard input before the System.IO.Process (cmd.exe ... \C ffmpeg.exe .... ) has started (I get System.InvalidOperationException : "StandardIn has not been redirected"). However, as soon as such process start, since it find standard input empty, it ends immediately, so I cannot make it in time to fill standard input.

  


  My code looks like this :

  


          MemoryStream memStream = new MemoryStream();

        // Data acquisition
        [...]
        bitmap.Save(memStream, System.Drawing.Imaging.ImageFormat.Bmp);
        [...]

        string ffmpegArgument = "/C ffmpeg.exe -y -i - -c:v libx264 -crf 12 -pix_fmt yuv420p -c:a libvo_aacenc -b:a 128k [...];

        Process cmd = new Process();
        cmd.StartInfo.FileName = "cmd.exe";
        cmd.StartInfo.Arguments = ffmpegArgument;
        cmd.StartInfo.UseShellExecute = false;
        cmd.StartInfo.RedirectStandardInput = true;
        cmd.Start();
        cmd.StandardInput.Write(memStream);


  


  Thanks to everyone who will answer.