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• NodeJs : Parsing POST request file upload as stream to ffmpeg

  29 mai 2017, par Christian Abdelmassih

  I’m trying to upload a file by sending a POST request to my NodeJs-server where the server will upon receiving the request (but not necessarily whole file) create a readStream on the incoming file and pass it to fluent-ffmpeg for video-compression and then saving it on the server. The idea is to pass the stream to ffmpeg without waiting for the whole file to be uploaded instead of waiting for the upload to complete and then pass the file since it would take more time and require to store the file temporarily on the server before the compression.

  With the current code ffmpeg gives the error pipe:0: Invalid data found when processing input which I translate to some error with the stream creation. The code is as follows

  module.exports = function(req, res) {
  
    let formidable = require('formidable');
  
    let form = new formidable.IncomingForm();
  
    form.parse(req, (err, fields, files) => {
  
      let readStream = fs.createReadStream(files.uploadedfile.path);
  
      let ffmpeg = require('fluent-ffmpeg')
  
      let ffmpegCmd = ffmpeg(readStream)
  
      ...
  
    });
  
  });

  Am I making some wrong assumption here ?

• Web script can't find installed package/software (CentOS)

  14 janvier 2017, par Ryan Butterworth

  I’m pretty new to using SSH and such to install software. I’m trying to use https://github.com/eyecatchup/php-yt_downloader on my site (http://voddr.com/yt/index.php?id=yrreBFLghMc) but as you can see, it comes back with the error "You must have Ffmpeg installed in order to use this function."

  I have installed ffmpeg, using Nux Desktop (see the guide I followed here : https://www.vultr.com/docs/how-to-install-ffmpeg-on-centos)

  When typing "ffmpeg" into SSH it comes back with this, which must mean it is installed :

  

  Also, I tried the command "which ffmpeg", which returned the path of ffmpeg : "/usr/bin/ffmpeg"

  php-yt_downloader uses which ffmpeg to detect whether it is installed, and if not, it returns the error "You must have Ffmpeg installed in order to use this function." - but if I’m able to use it fine from my SSH window, why can’t the script detect it ?

  All I’m wondering, is there something else I must do when installing software to allow a domain to use it (like install the software in the domain’s path ?), or is this entirely a problem with the php-yt_downloader resource ? I’m using CentOS 7 and Plesk web panel.

• How can I reset the path of FFMPEG in Java ?

  4 avril 2017, par Figgyja

  I accidentally set the path for FFMPEG to a different folder, and I can’t change it back.

  I’m using Processing (the API and its IDE) and the user created Video Export library to capture and write an mp4 video file. The library required FFMPEG, so I downloaded and installed it. After I installed it, I ran the code, and the library called Java to request the path of FFMPEG. I wrongly set the path to a different folder, which I eventually deleted. I knew I set it to the wrong folder, and ran the code again to see if I could trigger the Java prompt again to reset the folder.

  ---

  The console response I received was : (I’m sure most of it doesn’t have to do with the actual issue. However, I wanted to show all of it in case it somehow does.)

  Oct 24, 2016 10:23:25 PM java.util.prefs.WindowsPreferences
  WARNING : Could not open/create prefs root node Software\JavaSoft\Prefs
  at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
  java.io.IOException : Cannot run program
  "C :...\Processing\Octree_Graphics\data\FFMPEG\ff-prompt.bat" :
  CreateProcess error=2, The system cannot find the file specified at
  java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) at
  com.hamoid.VideoExport.startFfmpeg(Unknown Source) at
  com.hamoid.VideoExport.initialize(Unknown Source) at
  com.hamoid.VideoExport.saveFrame(Unknown Source) at
  Octree_Graphics.draw(Octree_Graphics.java:90) at
  processing.core.PApplet.handleDraw(PApplet.java:2399) at
  processing.opengl.PSurfaceJOGL$DrawListener.display(PSurfaceJOGL.java:731)
  at
  jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:692)
  at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:674)
  at
  jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:443)
  at
  jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1293)
  at
  jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1147)
  at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:759) at
  com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:81)
  at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:452)
  at
  com.jogamp.opengl.util.FPSAnimator$MainTask.run(FPSAnimator.java:178)
  at java.util.TimerThread.mainLoop(Timer.java:555) at
  java.util.TimerThread.run(Timer.java:505) Caused by :
  java.io.IOException : CreateProcess error=2, The system cannot find the
  file specified at java.lang.ProcessImpl.create(Native Method) at
  java.lang.ProcessImpl.(ProcessImpl.java:386) at
  java.lang.ProcessImpl.start(ProcessImpl.java:137) at
  java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) ... 17 more
  VideoExport error : Ffmpeg failed. Study
  C :...\Processing\Octree_Graphics\basic.mp4.txt for more details.

  ---

  I need to find a way to reset the path of FFMPEG that Java has. I have tried uninstalling and reinstalling the library, but I haven’t tried Java (I don’t want to mess with anything it has in its current state).

  P.S. The file listed at the end of the console response (basic.mp4.txt) was empty because it had not begun writing to the file yet.