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• ffmpeg : overlay video on top of a cropped video, map the overlay audio, cut the base video to the overlays length

  14 mars 2023, par roku

  I'm trying to overlay a video on top of a base video which is cropped to a shorts video format (standing phone). The overlayed video should be centered on top of the base layer. The base video's length should be reduced to the overlay's length. And I want to save only the overlay's audio.

  


  I've tried a bunch of stuff without much success. The current state of my ffmpeg command is this :

  


  ffmpeg -i overlay.mp4 -ss 00:00:00 -to <insert base="base"> -i base.mp4 -map 1:v:0 -map 1:a -vf "crop=ih*(9/16):ih" -crf 21 output.mp4&#xA;</insert>

  


  But this only gives me the cropped version of the base video. So my questions are :

  


  

  1. How can I figure out the base video's length ?

  


  2. How can I actually overlay (not map) other video on top of the base video ?

  


  3. How can I map the overlay's audio ? Since -map 1:a the base's audio and -map 0:a says : "Stream map '0:a' matches no streams. To ignore this, add a trailing ' ?' to the map."

  


  


  Any help is appreciated.

  


• Piwik Analytics becomes Matomo to reflect Users’ Privacy Focus

  10 janvier 2018, par Matomo Core Team

  One of the world’s leading analytics software platforms is changing its name. Piwik is the sixth most-used web and mobile analytics computer solution worldwide. It is now changing its name to Matomo.

  The name change comes after 10 years of Piwik building its top analytics software, with great success. It is already used on over one million websites in more than 170 countries. Matomo will build on that success, and focus even more on privacy.

  ‘Privacy has become a huge concern worldwide’, says Matomo’s creator, Matthieu Aubry. ‘Privacy legislation is being developed in Europe, and we will be ahead of the game in being ready for those changes. We’ll grow in line with the law and regulation changes.’

  Matomo will lead the way in openness and transparency for its users. Its new name means honesty in Japanese.
  ‘Matomo will always be free and community-driven, just as Piwik was’, says Matthieu Aubry. ‘We have worked with hundreds of people to create the best open digital analytics solution in the world. We’re committed to giving every user full control of their data.’

  The change of name is appropriate as the Matomo platform moves into a new stage of growth. But for its community, little will obviously change. The same people will still be involved, and users will still get useful data to improve their own website. That data includes who visits their site, what they do there, how long they stay, and what they buy.
  Matomo is an all-in-one analytics solution that gives companies a 360 degree view of their users.

  ‘They can grow their business while still keeping 100% ownership of their data, and being fully compliant with privacy laws’, says Matthieu Aubry. ‘We’re more motivated than ever to building on that, so that Matomo stays ahead of the pack.’

  The platform can be fully customised with hundreds of plug-ins, integrations and configurations.

  Matomo’s updated website and new logo is now available on https://matomo.org.
  For further information, please contact the Matomo Team on hello@matomo.org

  The post Piwik Analytics becomes Matomo to reflect Users’ Privacy Focus appeared first on Analytics Platform - Matomo.

• FFMpeg not merging videos well in Nodejs on same file

  5 mai 2017, par G.Darcan

  I am using MediaStreamRecorder to make a stream, I am getting video blobs from there every 5 seconds and i want to concatenate them in one file on server-side.
  So lets say i have a video named sample_1.mp4 . When i get the next video, i want to save it as sample_2.mp4 , and append it to sample_1.mp4 with ffmpeg, and after that save the output as sample_2.mp4 again.But it only saves first video and the last video parts.Can you help me please ? Thanks.

              var fs = require('fs');
  
              fs.writeFileSync("/sample_2.mp4", message.binaryData );
  
              console.log("The file3 was saved!");
  
              var firstFile = "/sample_1.mp4";
  
              var secondFile = "/sample_2.mp4";
  
              var output = "/sample_2.mp4";
  
              var proc = ffmpeg(firstFile)
  
              .input(secondFile)
  
              .on('end', function() {
  
                  console.log('files3 have been merged succesfully');
  
              })
  
              .on('error', function(err) {
  
                  console.log('an error happened: ' + err.message);
  
              })
  
              .mergeToFile(output, "/tmp");