Re: play media without using the JMF?

Question

Possible? Yes!
Logical? Probably Not!
The JMF implements a number features that video players need and thus reduces the amount of coding required to produce video products.
I have a altered an MPEG-4 codec written in C so that it can be called via JNI (The Java Native Interface) meaning I can decode MPEG-4 content while programming in Java.
If I were to avoid using JMF then I would have to deal with the conversion of the output from YCbCr (Commonly but mistakenly called YUV) to RGB and then put in an object that the Java awt system could present on the screen e.g. BufferedImage etc. Then I would have to deal with the timing etc for framerates and make sure that the data was processed quickly enough to be displayed as desired.
But by using the JMF I can just write a codec plugin and let the JMF handle the rest.
Hope this helps,
Stef

Answer 1

Hi, ii hope i explain this for ya
Jun4Java is an application written in java, it can handle 3d graphics and multimedia. The only way i found out that it was able to play the mpeg-4 movies, flash files, etc was buy actually running the application and trying to open and play the files with it - which it did.
As far as i can understand, jun4java uses the jni to enable it to play these media files, but to better explain it for you i think i'm gona post the readme file you get when you download the app, it explains jun4java, and it's capabilites better than i ever will...
Befoe you read it, the one thing i've noticed is that it seems to use the jni to play the multimedia through quicktime,
Jun for Java
"Jun for Java" is a name of a Java class library which can be
used as a framework to handle 3D graphics and/or multimedia. It
is an open source software, designed and implemented with object
oriented technologies, and of course free of charge.
Jun provides an OpenGL interface as a primitive for 3D graphics
handling. Of course you can do OpenGL programming by using the
OpenGL interface directly, we also provide dozens of advanced
features, large and small, as reusable class libraries,
including "ViewFinder" which shows 3D objects and allows users
to manipulate them, "ViewPort" which visualizes an eye point, a
sight point, far/near clipping planes, etc. of a corresponding
ViewFinder, "Flux" which plays a simple animation, "Grapher"
which shows graph structures (nodes and links) in a 3D space,
and so on.
"Jun for Java" also provides a QuickTime interface as a
primitive for multimedia handling. In addition to playing
movies/sounds or processing images by using the QuickTime
interface directly, there is a movie player, which is just like
a QuickTime Player, and you can extend it to create your own
movie player. You also can embed the movie player to your
application. Some advanced features like specifing a clip,
playing and repeating the clip, and creating a movie file of the
clip are also available.
Since "Jun for Java" provides functions for handling both 3D
graphics and multimedia, it is easy to coordinate them. For
example, you can select a frame of a movie and use it as a
texture of a 3D object without any hard programming. This is
the one of the strongest points of "Jun for Java".
"Jun" was originally developed on VisualWorks (Smalltalk) and
ported to Java as a project for the Information-technology
Promotion Agency, Japan (IPA). "Jun for Java" currently runs
on Windows 98/Me/NT4.0/2000/XP, Linux, and Macintosh OS X.