May 19, PM. Abinash said…. I am constantly facing the folowing exception: java. IOException: Could not connect to capture device javax. NoDataSourceException: Error instantiating class: com. DataSource : java. IOException: Could not connect to capture device at javax. NullPointerException at VideoTransmit. July 05, PM. Post a Comment. So I started with Spring documentation. It is straightforward. You can create the structure of your project using " Spring Initializr ".
This is an online tool where you can add all the desired dependencies to your project POM file. Since I am a big fan of Maven, I am generating a maven project. Please refer below screenshot for information I have provided while generating the project. When clicking on "Generate Project", it will download zipped maven project into your computer. For example, one could create a Controller without having to bother with providing an implementation for the methods in Player that a controller does not need.
For example, players can be created to display and integrate live broadcasts and large multimedia streams such as movies or music albums into the Web. Such players, combined with a high-performance media server such as Silicon Graphics Cosmo MediaBase, allow for the dissemination of pay-per-view content on the Web, training videos on corporate intranets, etc.
Note that while the long-term plan for JMF is possibly to provide Java implementations for decoders and lower-level framework components, current Player implementations use native methods for much of the lower-level processing.
For example, Intel uses Microsoft's ActiveMovie while Silicon Graphics uses its own Digital Media libraries to provide the core decoders for movie playback. Though the lower-level native code is non-portable, this tradeoff is made for the sake of speed. A further disadvantage, however, is that native code complicates the debugging of applets and applications that use JMF players, as native method debugging is not yet well supported in most Java development environments.
Other advanced features are provided for in the Player API. Any player may act as a controller for one or more other players.
This synchronization is achieved through the use of TimeBase objects, which function as clocks in JMF. Players can synchronize with one another using methods such as getTimeBase and setTimeBase. This minimizes the impact of varying network performance by providing a buffer out of which the multimedia stream can be played while the network catches up to the player after heavy loading slows it down.
Interfaces also are provided for GainControl and GainChangeListener so that multimedia samples with soundtracks can be better controlled. The API also contains packages to provide for reliable and unreliable, or streaming, media content see the API documentation for java.
JavaSoft currently states that the Media Capture portion of the JMF will be available with a final implementation sometime during the specific quarter is to be determined , while the Media Conference API's final implementation date is still to be determined.
The Player API provides the core functionality that Java needs to be a powerful multimedia processing and display platform. Everyone, from applet programmers with personal Web sites to player implementors at software companies and Web designers at content providers, will benefit in their newfound ability to deliver audio and video functionality in their programs. Future enhancements promise to add Capture and Conferencing tools, bringing Java in line with or possibly ahead of other languages in its multimedia processing and presentation capabilities.
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A videoconferencing project I was working on used JMF to capture video and audio, and transmit it to another endpoint. An issue was that my team didn't want the user of the product to have to install JMF. I thought it might be worthwhile to share our solution to this problem.
It works. It works well. My question to you is: does anyone have a better way to do it? The jmf. The dll s need to go into the win32 folder. You can have your program check to see if they are in the win32 folder. If they are not, you can have it copy them over from some location.
You only need to run this once, the first time the program is ever run, or if the user would like to add new capture devices. Lastly, just make sure the jmf. You're good to go at this point. All the functionality of JMF without actually having to install it. There really isn't a lot of work involved with this, and you can incorporate it into your custom installer quite easily.
Of course youll need to modify it to handle what you. It prob wont compile, but the stuff that is missing should be easy enough to recreate. But thought it might be a good starting point to help people. The detectCaptureDevices function is probably what will help most people. Ill update this class as I go. I don't think there is a better way. Unless the DLLs are explicitly loaded by path name, you would just need to make sure they are in the system path, so if they lived right next to the JVM executables it should also work.
Windows does implicitly include the directory the program was started from in the system path, so that is another potential location.
Installers are a double edged sword, they make it easy to add new functionality and remove it later, but they also make it harder to deploy solutions that use the product. One of the nice things about Java in general is that you don't have to install it for it to work.
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