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Index › Programming Questions & Help › Programs › Pb displaying in a browser applets using minim
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Pb displaying in a browser applets using minim (Read 1354 times)
sf
Pb displaying in a browser applets using minim
Jul 1st, 2009, 5:20pm  
Hello,

I have a problem with a serie of 8 internet pages,
each including a different signet applet.

Each applet uses Minim Libray for analysing mp3 or mic input.
The weight of each is between 2 and 5.5 mo.

The first time I launch a page, the applet loads, but when I try to open another one, nothing happends. (Fo the moment I just tried on Mac Safari and Firefox).

I assume it is a matter of memory or cache but I don't know what I've done wrong.

I used in my sketch a void stop for closing the player, the library and so but it seems not to be enough.

Has anybody an idea ?

Thanks in advance.
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« Last Edit: Jul 2nd, 2009, 6:27pm by sf »  
 
sf
Re: Pb displaying in a browser applets using minim
Reply #1 - Jul 2nd, 2009, 6:28pm  
Hello,

I get this message error:

Code:
=== Minim Error ===
=== Couldn't load the file 02_deep_roots.mp3

Exception in thread "Animation Thread" java.lang.NullPointerException
	at deep_roots_02.setup(deep_roots_02.java:390)
	at processing.core.PApplet.handleDraw(PApplet.java:1383)
	at processing.core.PApplet.run(PApplet.java:1311)
	at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
	at deep_roots_02.stop(deep_roots_02.java:88)
	at sun.applet.AppletPanel.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
==== JavaSound Minim Error ====
==== Unable to return a SourceDataLine: unsupported format - MPEG2L3 22050.0 Hz, unknown bits per sample, stereo, unknown frame size, 38.28125 frames/second,


Is the issue a matter of frameRate ?
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PhiLho 
Re: Pb displaying in a browser applets using minim
Reply #2 - Jul 2nd, 2009, 10:55pm  
Is the sound playing in the PDE, ie. when not an applet?
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WWW  
sf
Re: Pb displaying in a browser applets using minim
Reply #3 - Jul 3rd, 2009, 3:23am  
The applet works well individualy in running mode.

I conceived a large application as well including the 8 soundtracks and everything seem to be ok, mainly the transition between each part.

The first called internet page displays indeed the applet (I tried one by one, re-launching the browser each time) but the following displays depend on a logic I can't understand for the moment.

Perhaps my applet problem is just the clue of a minor issue in each sketch.

I'm going to have an elaborate look at the paramaters of Minim Library focusing on the sample rate,
nevertheless, if someone could give me a direction, I will be grateful.
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PhiLho 
Re: Pb displaying in a browser applets using minim
Reply #4 - Jul 3rd, 2009, 3:30am  
There might be a problem with running several instances of Minim in the same environment (browser). I fear my knowledge stops there.

You plan to share this application on a site? Because if the application is for your own usage, I don't see why you load the frames as applets.
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WWW  
sf
Re: Pb displaying in a browser applets using minim
Reply #5 - Jul 3rd, 2009, 4:22am  
Thanks PhiLho.

The app will be useful for the artist I collaborate with; for his live concert (so Audio Input) or for exhibition (so load .aiff)
The applet will be goodies I proposed for the mini-website; just for the joy of users.

Indeed, the pb should come from the call of Minim; I tried to disallow the cache, I tried to override the void stop with javascript, without success.

I'm currently changing the logAverages parameters; it seems returning less Java error. I'm crossing fingers :)


That's just my second artwork with Processing. I've probably done a very basic mistake.
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sf
Re: Pb displaying in a browser applets using minim
Reply #6 - Jul 3rd, 2009, 4:43am  
I'm going to post in Sound, Music Libraries category; it should be a better place to expose my problem.
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