GSVideo + packaged Jar on Mac: getting GSLibraryPath

achang

GSVideo + packaged Jar on Mac: getting GSLibraryPath

in Contributed Library Questions • 1 year ago

I realize troubleshooting gsvideo+jar-ing appears to have been asked a few times already, but I've tried all the proposed solutions and I still get my peculiar error when running my jar from the command line. (The jar is actually made in Eclipse and I have no problems launching from Eclipse.) I've tried setting GSVideo.localGStreamerPath explicitly in my code, I've tried using the -Djava.library.path=./lib/gstreamer/macosx32 command line argument (both relative and absolute paths), and I've tried copying the gstreamer folder into the same directory as my jar file, and directly into the compressed jar file, etc. -- and nothing seems to work. I hope I'm not missing something obvious. The error is as follows:

GSVideo version: 1.0.0
Exception in thread "Animation Thread" java.lang.StringIndexOutOfBoundsException: String index out of range: -12
at java.lang.String.substring(String.java:1937)
at codeanticode.gsvideo.GSLibraryPath.get(Unknown Source)
at codeanticode.gsvideo.GSVideo.lookForGlobalGStreamer(Unknown Source)
at codeanticode.gsvideo.GSVideo.setMacOSXPath(Unknown Source)
at codeanticode.gsvideo.GSVideo.initImpl(Unknown Source)
at codeanticode.gsvideo.GSVideo.init(Unknown Source)
at codeanticode.gsvideo.GSPlayer.initGStreamer(Unknown Source)
at codeanticode.gsvideo.GSPlayer.<init>(Unknown Source)

Any other insight would be appreciated! Meanwhile I suppose I'm off to investigate Ant/Maven's options for native library management (I eventually have to get this project running on both Mac and Linux...) Thanks in advance.

Replies(3)

andres

Re: GSVideo + packaged Jar on Mac: getting GSLibraryPath

1 year ago

how do you generate the jar you are trying to run from the command line? Using the "export application" option in the PDE? The StringIndexOutOfBoundsException error makes me think that there is some problem with the names in your jar file.

Also, a while ago I posted on my blog some recommendations to solve this kind of problems with GSVideo, maybe this helps.

achang

Re: GSVideo + packaged Jar on Mac: getting GSLibraryPath

1 year ago

Thanks andres... I appreciate that you're still monitoring the forums regularly and providing GSVideo support!

To answer your question, I'm exporting a runnable jar from eclipse.

I did solve my problem though, by

1. including the library from source,

2. including gstreamer-java.jar (it is unnecessary to manually link the native libraries via properties in Eclipse),

3. removing GSVideo.jar from the project build path entirely.

Mac OS still requires GSVideo.localGStreamerPath to be set explicitly (I specify the absolute path using dataPath()), but it works on Linux without setting that.

I reached this by trial and error so I can't really say why it works, though I know it's a java build path problem and not the library's problem. Nonetheless, hopefully it helps someone in the future.

andres

Re: GSVideo + packaged Jar on Mac: getting GSLibraryPath

1 year ago

Thanks for the additional information. Since removing the jars fixes the problem, this gives me some idea of what could be changed to potentially solve these issues with exported apps. Basically, at some point GSVideo calls:

URL url = this.getClass().getResource( "GSLibraryPath.class");

to ge the folder where the gstreamer native libs are located, but maybe this method doesn't work when GSVideo.jar is included in the jar exported from Eclipse (since the jar with the class files is probably the app jar and not GSVideo's jar). I will try to look at this later.