Recherche avancée

Sur d’autres sites (10776)

• Java - Runtime.exec() freezes on execution of ffmpeg Audio-replacing command that works in windows console

  25 mars 2023, par Finn Andre Worm

  I have been building an application to merge together videos based on data I got from the web. I was lucky enough to find this great tool ffmpeg that has saved me a lot of time and effort, but unfortunately I seem to be stuck on the following issue :

  


  Im attempting to execute a command for merging a video with audio (in the future I will also be adding hardcoded .ASS subtitles and .PNG images).
My application dynamically generates me a command based on the files its suppposed to use which works just as intended, as the command that I get works inside of my windows console (cmd).
But when I try to run it through my Java application, the code seems to "freeze" permanently and while the placeholder file gets created on my desktop with the filename and correct file format, it just has the default windows video icon and cant be opened (as it has not finished being created, duh).
Im also using Eclipse, perhaps thats worth noting.

  


  This is the part of the code where it freezes :

  


  protected void runFFMPEG(Multimap args, String outputFile, String fileFormat) throws IOException
{
    try
    {
        Runtime.getRuntime().exec(setCommand(args, outputFile, fileFormat)).waitFor();
    }
    catch (InterruptedException e)
    {
        e.printStackTrace();
    }
}


  


  as previously said, the command itself is generated correctly, but heres the code nonetheless :

  


  private String[] setCommand(Multimap args, String outputFile, String fileFormat)
{
    String[] command = new String[args.size()*2+2];
    command[0] = ffmpegLocation;
    int[] i = new int[1];
    i[0] = 1;
    args.forEach((key, value) -> { 
        command[i[0]++] = key;
        command[i[0]++] = value;
    });
    command[i[0]] = outputFile + fileFormat;
    return command;
}


  


  Note : I used a normal string previously for command, but I saw another thread saying that using an array instead fixxed their issue (which it didnt for me, else i wouldnt be here...).

  


  This is an example command that gets generated :

  


  ffmpeg.exe -ss 00:00:00 -to 00:00:15 -i C :\Users\Test.mp4 -i C :\Users\FINAL.mp3 -map 0 -map 1:a -c:v copy C :/Users/User/TestVideo.mp4

  


  I also have a different command that concats the audio together into one FINAL.mp3 file, so its not like ffmpeg entirely fails to work in my application.
My guess is that it has something to do with the Runtime i get with Runtime.getRunTime(), but I cant seem to find out what the problem is.
Can someone tell me what I did wrong ? Thanks in advance !

  


• lavu/pixfmt : fix redundant comment

  24 mars 2017, par Clément Bœsch

  lavu/pixfmt : fix redundant comment
  Mistake introduced in a1f6b1d9d816ad7e6a8f071b0efa2638bc80e65e.
  

  • [DH] libavutil/pixfmt.h

• lavfi/testsrc : grammar fix in comment after 03e2ec32.

  14 avril 2013, par Clément Bœsch

  lavfi/testsrc : grammar fix in comment after 03e2ec32.