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• file already in use FFmpeg

  11 septembre 2018, par boandriy

  I am running a server that stores video files. When the file is uploaded I run the method below to compress it :

  private void compressVideo(String fileName) throws IOException
  
  {
  
       String cmd[] = {"location to my ffmpeg.exe","-y", "-i", 
  
                              "location to my inputfile"+fileName,"-vcodec","libx264","-crf","20",
  
                              "location to my output file"+fileName};
  
              Runtime.getRuntime().exec(cmd);
  
  
  
  }

  It works fine if my output fileName is different from input fileName.

  But when I run the program with the same names, FFmpeg clearly starts the process but it is not ended (after that I can’t open the overwritten file, it tells me that file is in use by FFmpeg).

  There is no error followed in the console.

  I have tried doing the same thing without running the server and it worked.

  As I am the beginner, I would like to know if I made any mistakes ?
  Any ideas how can I solve this problem ?

  Thanks in advance !

• Electron ffmpeg integration

  27 avril 2017, par Raider Dave

  I am in way over my head here. I am normally a coldfusion/javascript/jquery developer but now have taken on a task that assumes I know more than I do.

  I am trying to write an application in electron that will allow me to select a group of video files and convert them to mp4 files while also compressing them. The files are football plays and a normal game consists of about 160 plays and 18gb. We need to compress these down to about 4gb. I have used programs like Prism to do this, but the intended users are not technically savvy nor do they all have windows - some have Macs.

  I have an electron project that I have started and got the first part to work. I can start the app and select the input files. But I have tried all kinds of different solutions found online to call ffmpeg and pass it the parms to convert a file. Is there an easy way to call ffmpeg with parms and then wait for it to finish before continuing ?

  I am on Windows 10 but will also need to run on Apple OS. Please, if you have a simple example of how to do this, I would appreciate it.

  Thanks !
  Dave

• Live streaming from iphone To wowza server

  4 décembre 2013, par user2959377

  I need to develop an iphone app that streams live video to wowza server. For encoding the captured video in H.264 and to compress it i need to use FFmpeg. I am unable to proceed because of limited content on internet explaining compilation of FFmpeg.
  I used https://github.com/lajos/iFrameExtractor to start with compiling of FFmpeg, but i dont understand how to use the generated files in my application. I am using AVFoundation and can successfully generate the video but dont know how to compile the captured video through FFmpeg. Any link that could help in starting with compiling and using ffmpeg in iphone would be of great help.