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• Using Xuggler to detect Webcam with Java

  18 octobre 2012, par Oneiros

  I'm trying to use Xuggler library to handle webcam video stream in Java.

  My project contains these files :
  

  • Xuggler Jar (xuggle-xuggler-5.4.jar)
  • SLF4J Jars (required by Xuggler and downloadable here) :
    • jcl-over-slf4j-1.6.4.jar
    • jul-to-slf4j-1.6.4.jar
    • log4j-over-slf4j-1.6.4.jar
    • slf4j-api-1.6.4.jar
    • slf4j-ext-1.6.4.jar
    • slf4j-migrator-1.6.4.jar
    • slf4j-simple-1.6.4.jar
  • DisplayWebcamVideo.java as main class

  I run the main method using "vfwcap" and "0" as arguments.
  Application starts correctly, i can see myself from the webcam but it's just the first frame : the stream freezes and i see this output :

  5022 [Thread-3] ERROR org.ffmpeg - [vfwcap @ 000000000039A320] real-time buffer 75% full! frame dropped!

  5622 [Thread-3] ERROR org.ffmpeg - [vfwcap @ 000000000039A320] real-time buffer 85% full! frame dropped!

  6522 [Thread-3] ERROR org.ffmpeg - [vfwcap @ 000000000039A320] real-time buffer 95% full! frame dropped!

  6822 [Thread-3] ERROR org.ffmpeg - [vfwcap @ 000000000039A320] real-time buffer 101% full! frame dropped!

  6822 [Thread-3] ERROR org.ffmpeg - [vfwcap @ 000000000039A320] real-time buffer 101% full! frame dropped!

  What's the problem here ? :(

• Using FFMPEG in Java (developing on Mac)

  1er mai 2012, par Luuk D. Jansen

  I am trying to evoke FFMPEG directly in my Java code (running under the Playframework !).
  The final product will run on a Linux/Debian distro, but I first need to test on my Mac (I don't know if it works on Debian yet).

  I try to execute the simple code :

  Process pr = Runtime.getRuntime().exec(new String[]{"bash","-c", "ffmpeg"});

  or simpler :

  Process pr = Runtime.getRuntime().exec("ffmpeg")

  or using ProcessBuilder :

  Process pr = new ProcessBuilder("/opt/local/bin/ffmpeg").start();

  What I get is an error code 133, but I cannot find what this means.
  In the terminal the command gives the normal output. I can also replace 'ffmpeg' with e.g. 'ls -la' and get the directory listing. But I don't know what the problem is that ffmpeg does not work.

  Anybody any clues ?
  Thanks !

  UPDATE :
  I looked at the error stream. These are the errors I get. How is it that it works in the terminal, but not in using Java ?

  14:43:19,619 DEBUG ~ FFMPEG: dyld: Library not loaded: /opt/local/lib/libogg.0.dylib
  
  14:43:19,619 DEBUG ~ FFMPEG:   Referenced from: /opt/local/bin/ffmpeg
  
  14:43:19,619 DEBUG ~ FFMPEG:   Reason: Incompatible library version: ffmpeg requires version 9.0.0 or later, but libogg.0.dylib provides version 6.0.0

• how to extract audio from video with xuggler in Java ?

  24 juin 2013, par Syed Sabhi Xaidi

  Actually i am extracting mp3 from flv it makes the mp3 file but with 0kb so please tell me what i do ?

  public class sasas

  public static void main(String[] args) {
  
      IMediaReader reader = ToolFactory.makeReader("D:/frames/mk.flv");
  
  
  
      IMediaWriter writer = ToolFactory.makeWriter("D:/frames/as.mp3",reader);
  
  
  
      int sampleRate = 44100;
  
      int channels = 1;
  
      writer.addAudioStream(0, 0, ICodec.ID.CODEC_ID_MP3, channels, sampleRate);
  
  
  
      while (reader.readPacket() == null);
  
  
  
         }