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• how to convert any audio file to wav on server side with node.js [on hold]

  9 juin 2014, par pufmaigre

  my dear stackoverflow

  I spent hours looking for an efficient and pretty way to transcode audio on server side, and I found a lot of informations... actually too much informations.

  Sox for Node.js looks fine but there are not so much documentation, I was unable to convert a mp3 to wav with it :

  https://www.npmjs.org/package/sox

  Then fluent ffmpeg sounds good but I have the feeling I will loose a lot of time to achieve my goal with it :

  https://github.com/fluent-ffmpeg/node-fluent-ffmpeg

  and then i found some more obscure stuff like those ones :

  https://github.com/andrewrk/node-plan-transcode

  https://github.com/benvanik/node-transcoding

  I’m not sure it’s really the "stackoverflow spirit" but I’m asking you wich way would you choose to achieve my goal because I’m feeling lost in the codec jungle.

  thanks in advance !! love :)

• FFMPEG Wrapping a raw video stream with OGG (or another wrapper)

  9 juillet 2014, par Cykon

  I’m building an application which takes in a rawvideo stream (piped in from an ffmpeg instance), manipulates and reads the raw video data, and pipes the output to another ffmpeg instance for encoding. Everything works great, however I’ve been trying to think of a solution which would allow audio to be sent into my program as well.

  The Ogg container seems to have a great C library, and it appears as if there has been some movement to add support for raw video https://wiki.xiph.org/OggRGB

  My plan was to pipe in a stream formatted for Ogg, use libogg to demux it, after parsing through the video data and manipulating it... use libogg again to encode and pipe out.

  Unfortunately, FFMPEG throws an "Unsupported codec id in stream 0" error when asked to output OGG with rawvideo.

  My test ffmpeg command is as follows :

  ffmpeg.exe -i fs0.mp4 -f ogg -c:v rawvideo -pix_fmt rgb24 -s 192x144 -

  Any solutions, or alternative solutions are welcome. As a side note, my program has the ability to take in multiple videos at once and outputs a combination of the inputs.

• Codeigniter - exec ffmpeg (win 8.1 with xampp)

  31 août 2014, par xelA

  i want to merge some image files (jpeg,png) to a short stop motion video clip.

  The User can upload the images and the webapp will do a short movie... Thats the plan.

  I have tried some variations i found in www -> exec, shell_exec

  The ffmpeg.exe is in my root Folder (xampp/htdocs/xxx/ffmpeg.exe)

  I put a function in my controller to do the clip.

  public function render() {
  
  
  
      // Save the Session ID into the variable sessionId
  
      $sessionId = $this->session->userdata('session_id');
  
      // Path to the Userimage-Folder 
  
      $image_path = "C:\xampp\htdocs\xxx\uploads\$sessionId";
  
  
  
      $command = "C:\xampp\htdocs\xxx\ffmpeg -framerate 1/5 -i".$image_path."/img_%03d.JPG -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4";
  
  
  
      exec($command);
  
  
  
  }

  The images are already in the same format and have a consecutive numbering.

  I’am still a beginner, so please help me.

  regards :)