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• how to convert PCM file to MLP file using FFmpeg in windows ?

  21 octobre 2014, par user2877921

  I have tried converting .mp3 file to .pcm file.now i have added a encoder file which converts it into MLP file.i need the command in command prompt to convert pcm file to mlp file.

• Processing3 get "Error=2 No such file or directory" with a file that actually doesn't exist at the first place

  29 octobre 2016, par Tuang Pingfavilunda

  I cannot figure it out what happen to my Processing file. I am trying to use VideoExport library and my Macbook Pro cannot play it, but the Mac-mini is able to do so.

  Before the error happened it is another error=13 permission denied thing, so I messed in the terminal for a while with chmod 777 and finding the file with ls. I don’t know if that may be the reason that caused this happen. FYI, I also installed ffmpeg already.

  And this is the full error :

      java.io.IOException: Cannot run program "/Users/Tuang/Desktop/DMA_WORKS/Work1_Facial Muscles/Cam_Rec/sketch_161027a/sketch_161027a.pde": error=2, No such file or directory
  
      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 Basic.draw(Basic.java:32)
  
      at processing.core.PApplet.handleDraw(PApplet.java:2412)
  
      at processing.awt.PSurfaceAWT$12.callDraw(PSurfaceAWT.java:1540)
  
      at processing.core.PSurfaceNone$AnimationThread.run(PSurfaceNone.java:316)
  
  Caused by: java.io.IOException: error=2, No such file or directory
  
      at java.lang.UNIXProcess.forkAndExec(Native Method)
  
      at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
  
      at java.lang.ProcessImpl.start(ProcessImpl.java:134)
  
      at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
  
      ... 7 more
  
  VideoExport error: Ffmpeg failed. Study /Users/Tuang/Desktop/DMA_WORKS/Work1_Facial_Muscles/Camera_Recorder/Basic/basic.mp4.txt for more details.
  
  Could not run the sketch (Target VM failed to initialize).
  
  For more information, read revisions.txt and Help → Troubleshooting.
  
  </init>

  ---

  1) The java.io.IOException : trying to call "/Work1_Facial Muscles/Cam_Rec/sketch_161027a/sketch_161027a.pde" which doesn’t exist for real. It is gone for a long time but seems like the program stuck here.

  2) "basic" is a file name from the Example of the Library. I just use it to test. Surprisingly, Every files that have been saved and changed the name still get the java.io.IOException’s error of the missing sketch_161027a.pde file.

  ---

  What I have done :
  1 I have already done the Homebrew thing to install ffmpeg.
  2 I deleted everything of Processing and reinstall it again.

  Any suggestion ?

• How to create a named pipe in Windows ?

  10 février 2023, par Che

  Is it possible without much effort (e.g. in command line or powershell), to create a named pipe ?

  


  My goal is to write continously to that pipe from a ffmpeg-process.

  


  Without opening a Pipe at first the following command

  


  ffmpeg -i "path\to\my\File\name of my File" -f webm \\.\pipe\from_ffmpeg


  


  fails to

  


  


  "\.\pipe\from_ffmpeg : No such file or directory"

  


  


  In the big picture, I want to read a Live-Web-Video-Stream to analyze it and take live-actions based on that.
I am working with OpenCV in Java on a Windows machine. At the moment I have different ffmpeg-processes, which record different sectors (i.e. pixels (45, 45, 100, 100) and (200, 200, 100, 100) (x, y, height, width). The results are saved as jpg files in the filesystem and are then opened in a Java Process. This works, but I think I would significantly gain performance by not taking the long way over the files but to directly pipe my input into the Java-Process.

  


  I know there's an option to live-capture videostreams via open-CV but the framework does not support as many formats as ffmpeg does.