Custom DataSource plays in JMStudio, but not in my application

Question

hello everyone. I need someone to help me out who has played around a lot with DataSources.
I have been playing around with custom DataSources for a small while and I have not been able to figure out something and its starting to get frustrating.
First let me tell you what process I exactly follow when I want to create a Custom DataSource (using the "Generating Live Audio/Video Data" datasource code sample as an example - from JMF solutions http://java.sun.com/products/java-media/jmf/2.1.1/solutions/LiveData.html):
1. Suppose the source files (DataSource.java and LiveStream.java) are lying at C:\customds\.
I compile the files like this:
javac -d . DataSource.java LiveStream.java
As a result this directory is formed C:\customds\jmfsample\media\protocol\live which contains all the compiled (interpreted) files.
2. Then I register 'jmfsample' in the Protocol Prefix list and commit the changes using the JMFRegistry GUI.
3. Now if I run JMStudio and enter the URL live: it gives me an error that it can't create a player. I feel this is happening because some classpaths haven't been set correctly. Eventually I figured out that I have to place the \jmfsample\media\protocol\live\ directory inside the <JMF install dir>\lib\. Doing this fixes the problem and now I can go to JMStudio and run the protocol using the 'Open URL'. Giving it 'live://' plays the 'blue screen' like a gem.
4. But here is the catch now. When I create an application which tries to create a player using live:// as a source, it doesn't run and keeps giving me a noPlayerException, or a noDataSourceException (as the case would apply; code given below).
The funny part is that i checked the JMStudio source code for the method that is used to 'Open URL'. I haven't found any siginificant change in the way it opens urls.
I also went a step further and tried to compile and run the JMStudio code myself to trace the code when it is in the process of opening a url. The weird thing is that when I try to do that, giving live:// as a URL gives me the same error that is given by my application. In other words JMStudio when compiled by me gives me same the error of "can't create a player..." when I open the url live://. Has Sun used a JMStudio compiled using a different source file?
Please please anyone tell me what is wrong here.
I have basically tried out these two kinds of things in my code, and both give me a noPlayerException error:
Player guiPlayer = Manager.createRealizedPlayer(new MediaLocator("live://"));and
DataSource ds = Manager.createDataSource("live://");
Player guiPlayer = Manager.createRealizedPlayer(ds);Thanking in anticipation.
regards

Answer 1

Would it be possible for you to expand on your solution a little bit? I'm trying a similar approach, and having a similar problem to yours. From Googling, it appears as if this is a very common problem, and a lot of people give up before they solve it.
I'm trying to use jmf.jag (and optionally add fobs4jmf.jar), not compile it from source. But I am trying to compile my own protocol from source and run it in a debugger. I have all the class files going out to the same output directory, and IntelliJ generally adds them all to the CLASSPATH automatically. But I keep getting NoPlayerException. (If I break down the players construction step-by-step, it seems to fail on "Processor ps = Manager.createProcessor(ds);".)
I'm trying to play a Quicktime movie from memory, and I've confirmed that I'm returning "video.quicktime", that my stream is Seekable and isRandomAccess returns true, my prefix is in the protocol list, and that the package name is correct. I've tried with PLUGIN_PLAYER being true or false, media type being video.quicktime or unknown, and every other permutation I can think of.
Any help would be greatly appreciated.