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Xuggler MediaWriter operation not allowed

I get an exception when I close IMediaWriter, I make a simple transcode. The exception is "java.lang.RuntimeException: error. Operation is not allowed, could not write a trailer for testing .mp3" I get this when I call IMediaWriter.close (), Any ideas why I get this for simple transcoding? Here is a sample code:

IMediaReader reader = null; 
    IMediaWriter writer = null; 
    try { 
        reader = ToolFactory.makeReader("test.wav"); 
        writer = ToolFactory.makeWriter("test.mp3", reader); 
        reader.addListener(writer); 
        while (reader.readPacket() == null) ; 
        reader.close(); 
        writer.close(); 
    } catch (Exception ex) { 
        ex.printStackTrace(); 
    }
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1 answer

This will work because I ran into the same problem. Thank. If you want more clarification, please ask ...

IMediaReader reader = null; 
    IMediaWriter writer = null; 
    try { 
        reader = ToolFactory.makeReader("sijo.mp4"); 
        writer = ToolFactory.makeWriter("Thomas.flv", reader); 
        reader.addListener(writer); 
        while (reader.readPacket() == null) ; 
        //Should IMediaReader automatically call close(), only if ERROR_EOF (End of File) is returned from readPacket().
        reader.setCloseOnEofOnly(false); 
        //If false the media data will be left in the order in which it is presented to the IMediaWriter.
        //If true IMediaWriter will buffer media data in time stamp order, and only write out data when it has at least one same time or later packet from all streams.
        writer.setForceInterleave(false);
        System.out.println("closed...");
    } catch (Exception ex) { 
        ex.printStackTrace(); 
    }
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