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• How to concatenate videos using FFMPEG in android using guardian project

  12 juin 2014, par Divya Motiwala

  I am trying to combine two mp4 videos using guardian project as library project in my app. But it does not generate the output at specified location. I went through various solution for it but no success.
  PFB the code :

  File fileTmp = this.getCacheDir(); 
  
  File fileAppRoot = new File(this.getApplicationInfo().dataDir);
  
  
  
  FfmpegController fc;
  
  
  
  fc = new FfmpegController(fileTmp, fileAppRoot);
  
  
  
  
  
  
  
      final Clip out = new Clip(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)+"/Video/compiled.mp4");
  
  
  
      ArrayList<clip> listVideos = new ArrayList<clip>();
  
  
  
      File fileVideoRoot = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)+"/Video");
  
      String[] fileList = fileVideoRoot.list();
  
  
  
      for (String fileVideo : fileList)
  
      {
  
          if (fileVideo.endsWith("mp4"))
  
          {
  
              Clip clip = new Clip();
  
              clip.path = new File(fileVideoRoot,fileVideo).getCanonicalPath();
  
  
  
              fc.getInfo(clip);
  
  
  
              clip.duration = clip.duration-1;
  
              listVideos.add(clip);
  
  
  
  
  
          }
  
      }
  
  
  
  
  
      fc.concatAndTrimFilesMP4Stream(listVideos, out, false, false, new ShellUtils.ShellCallback() {
  
  
  
          @Override
  
          public void shellOut(String shellLine) {
  
  
  
              System.out.println("fc>" + shellLine);
  
          }
  
  
  
          @Override
  
          public void processComplete(int exitValue) {
  
  
  
              if (exitValue &lt; 0)
  
                  System.err.println("concat non-zero exit: " + exitValue);
  
  
  
          }
  
      });
  
  </clip></clip>

  I am getting exception :

  There was a problem rendering the video :
  /mnt/sdcard/Download/Video/compiled.mp4

  Please guide me on how to concatenate videos in android.

• executing batch file when called from java project

  28 décembre 2013, par Mostafa Wasat

  So I'm working on a java project, that at some point I have to execute a batch file (from within the code).

  The batch file runs fine if I run it by double clicking in windows explorer,
  and/or even if I write the command in the command prompt it runs ok.

  However, when i call the file from the java code, the command prompt launches and says that its not a recognized command, program, or batch file.

  the patch file looks something like this :

  ffmpeg -re -i C:/001.mp3 -c:a mp3 -ar 12000 -f mulaw -f rtp rtp://127.0.0.1:1234

  and here's how I call it within the java code :

  Runtime.getRuntime().exec("cmd /c start c:\\encode.bat");

  I might add that the command prompt when run by java it runs as administrator and I have included the ffmpeg path to be run by any user anyway.

  Excuse me if I have missed any important details and would be happy to provide them if anyone needs further details to answer my dilemma.

  why might this be ?

  Edit :
  i have tried the same code on another pc and it works fine, can someone please explain to me why the command doesnt get recognized when the command prompt gets run through java

• FFmpeg output to MacOSX screen ?

  18 août 2014, par Richard Milewski

  How do I route ffmpeg output to the screen on MacOSX ?

  If I type :

  ffmpeg -i input.mp4 -i logo.png -filter_complex overlay  output.mp4

  The output file contains the input file with the logo overlayed on top of it.

  If I type :

  ffplay -i input.mp4 -i logo.png -filter_complex overlay  

  Then it throws the error :

  Argument 'logo.png' provided as input filename, but 'input.mp4' was already specified.

  ...but typing :

  ffplay -filters

  displays a list of filters including :

   T.C overlay          VV->V      Overlay a video source on top of the input.

  Clearly, I’m missing something obvious.

  How do I route ffmpeg output to the screen, and where can I find a list of which filters and options work in ffmpeg but not in ffplay ?