The installer installed QuickTime’s various pieces in your system, adding a QuickTime group to your Start Menu, a QuickTime icon in your System Tray, various pieces in C:WINDOWSSystem32QuickTime, etc.It puts QTJava.zip in the lib/ext directory of any valid Java installations it finds, adds a systemwide environment variable called QTJAVA with the. Oct 23, 2014.
QuickTime for Java or QTJ is a software library that allows software written in the Java programming language to provide multimedia functionality, by making calls into the native QuickTime library. In practice, it allows Java applications on Mac OS, Mac OS X and Microsoft Windows to support the capture, editing, playback, and export of many different media formats and codecs.
To get QuickTime on a device running Windows 10, you'd have to download the software from the Apple Support website linked above. Simply click on the download button to start the download of the QuickTime installer. Once it has been downloaded, click on QuickTimeInstaller.exe to run it on your system. Many operating systems include Java by default, but if you have not installed Java, you will need to do so. The newest Mac build now has a built in version of Java. It no longer matters what version of Java is on your computer because Datavyu will use the one that it installs. Datavyu supports video playback through Quicktime.
QTJ has been deprecated by Apple.[1]
History[edit]
Owen W. Linzmayer, in Apple Confidential 2.0, traces QuickTime for Java's genesis back to Kaleida Labs, a spin-off company created by Apple Computer and IBM, noting that it and some Unicode text classes were the only Mac software salvaged from the four-year, $150 million disaster.[2] Ported to the Mac OS, it was developed under the code-name 'Biscotti', and first released as a public beta in 1999.[citation needed] Later versions were installed by default with Mac OS and Mac OS X, and were an optional part of the QuickTime install for Windows.
QTJ 6.1[edit]
In 2003, Apple issued a Java 1.4.1 implementation that broke any QTJ applications that tried to run under 1.4.1 on Mac OS X. The underlying problem was Apple's move from Carbon to Cocoa for their AWT implementation, and the removal of a Java-to-native library called 'JDirect' that QTJ relied on. QTJ applications could still run under Java 1.3.1, but apps that did not specify the version of Java they required, or that needed 1.4 features, were rendered unusable.
Later that year, Apple released a new version of QTJ that dealt with the incompatibilities, by offering a compatible but scaled-down version of the GUI classes. This 6.1 version of QTJ also radically changed the API, so that instead of having developers create GUI components and associate
Movie
s or other renderable objects with them, the developers now needed to start with the Movie
and request a suitable component from a factory. The new version also neglected to provide a component to show a visual preview of the input from a capture device, such as a webcam or camcorder.[3]Design[edit]
QTJ lays an object-oriented API on top of the native C-based QuickTime library. It does this by associating common
struct
s and the functions that work with them into classes. For example, the Movie
struct is the basis of the class quicktime.std.movies.Movie
, with functions like NewMovieFromFile
and GetMovieTrackCount
becoming the instance methods fromFile()
and getTrackCount()
respectively. The result is more like a genuine object-oriented API than other C-to-Java adaptations (such as JOGL, which dumps the OpenGL header files into classes with thousands of static methods).[4]The Cocoa-based QTKit is a similar attempt to put an object-oriented layer atop the procedural QuickTime library, using Objective-C.
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Quicktime Download Mac Os X
Apple's use of the top-level package name
quicktime
violates the Java Language's Specification convention that packages use a reverse-domain-name scheme, such as com.apple.quicktime
. However, as Apple owns the 'QuickTime' trademark, there is no realistic chance of a namespace collision, the prevention of which is the purpose of the package naming convention.It is important to remember that QTJ is not a Java implementation of QuickTime, it is a Java wrapper around native QuickTime calls. Qt 5.9 mac download version. For this reason, it can only run on systems that have the QuickTime libraries installed, namely the classic Mac OS (which is no longer supported), Mac OS X, and Windows.
Features[edit]
QTJ offers access to most of the native QuickTime library, including
- Playback
- Editing
- Capture
- Graphic import and export
- Movie import and export
- Sample-level access
As a wrapper around QuickTime, QTJ also inherits support for a vast collection of media formats and codecs, including MPEG-1, MPEG-4, H.264, AAC, Sorenson Video, Flash, 3GPP, WAV, AIFF, and more. Since QuickTime itself can be extended, QTJ can pick up support for formats such as DivX and Ogg Vorbis through the use of third-party QuickTime components.
Code Example[edit]
The following example shows an AWT file-selection dialog and then tries to import and play the selected media file.
Most of the code in this example involves itself with setting up the GUI. The only calls to QTJ are the calls to
OpenMovieFile.asRead()
and Movie.fromFile()
, which create a QuickTime movie from the specified file, and the calls to create an AWT component from the QTFactory
. This example puts the movie into the frame and immediately starts playing it; if a control bar (aka a 'scrubber') were desired, you would create a MovieController
from the Movie
and then create a component from the controller, rather than from the movie.Status and Outlook[edit]
QTJ's acceptance is limited by its nature as a wrapper around Apple's proprietary QuickTime library. Canon mf240 mac driver download. It does not exist for any platform other than Mac and Windows, and cannot until and unless Apple ports QuickTime to another platform, such as Linux.
Currently most of QTJ is broken on recent Windows-running computers. Windows machines that use the no-execute (NX) page-protection security feature of recent CPUs cannot run even the demos without changing the configuration. This can be easily verified by a developer via a test-run of one of the demos coming with QTJ. An 'execution protection violation' is reported and the program is aborted by Windows. This renders QTJ unsuitable for end-user application development due to the necessary complicated configuration of the NX feature.
Following the 2003 release of QTJ 6.1, Apple has made few updates to QTJ, mostly fixing bugs. Notably, QuickTime 7 was the first version of QuickTime not to be accompanied or followed by a QTJ release that wrapped the new native API's. QuickTime 7's new API's, such as those for working with metadata and with frame-reordering codecs, are not available to QTJ programmers. Apple has also not offered new classes to provide the capture preview functionality that was present in versions of QTJ prior to 6.1. Indeed, QTJ is dependent on some native API's that Apple no longer recommends, most notably QuickDraw.
See also[edit]
- Xuggler, Java API for video encoding and decoding that works on Mac, Linux and Windows
External links[edit]
- QuickTime for Java at Apple Developer Connection
References[edit]
- ^QTJava will be depreciated next year.
- ^Owen W. Linzmayer, Apple Confidential 2.0
- ^The Return of the Blue Q
- ^Chris Adamson, QuickTime for Java: A Developer's Notebook
Retrieved from 'https://en.wikipedia.org/w/index.php?title=QuickTime_for_Java&oldid=977020117'
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