What is the IBM Toolkit for MPEG-4?
The IBM Toolkit for MPEG-4 consists of a set of JavaTM classes and APIs with three sample applications: a cross-platform playback application and two tools for generating MPEG-4 content for use with MPEG-4-compliant devices. These applications are as follows:
AVgen: a simple, easy-to-use GUI tool for creating audio/video-only content for ISMA- or 3GPP-compliant devices
XMTBatch: a tool for creating rich MPEG-4 content beyond simple audio and video
M4Play: an MPEG-4 client playback application.
Since the toolkit is Java-based, both the client application and the content creation applications are cross-platform and will run on any platform that supports Java.
The above applications are provided as demonstration of this toolkit. Those who experiment with the three included applications and are interested in creating their own applications can e-mail alphaWorks about licensing.
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How does it work?
AVgen and XmtBatch tools combine independently coded MPEG-4 media objects into an MPEG-4 file.
AVgen can be used to generate audio- and video-only content and optionally hint it for delivery over RTP/RTSP transport for both ISMA- and 3GPP-compliant devices.
XMTBatch provides more comprehensive authoring facilities using MPEG-4 Systems, including graphics, animation, and user interaction.
The XMTBatch tool creates MPEG-4 binary content from the high-level textual descriptions created in the XMT (Extensible MPEG-4 Textual Format in XML) standard. It supports content created in the high-level format XMT-O (based on the SMIL 2.0 syntax and semantics) as well as the low-level XMT-A format (based on the X3D, VRML in XML). The XMTBatch tool also provides transcoding functions for instance transforming from WMF (Windows Meta File) format to MPEG-4.
字串4 M4Play renders MPEG-4 content created by the above tools. The M4Play application can render the following file types:
MP4: ISMA-compliant
MP4: including MPEG-4 Systems
AVI: MPEG-4 Simple Profile video (such as Divx, Xvid) with MP3 audio.
MPEG-4 Simple Profile video (.cmp, .m4v, .263)
AAC Low-Complexity Profile audio (.aac, .adif, .adts)
MP3 MPEG-1 and MPEG-2 Layer 3 audio (.mp3)
A single track from MP4 or AVI can be played by appending a track selection where the track is selected by type, such as audio, video, etc. The track itself, when there is more than one, can be indicated by a numeric index in brackets. For example, myFile.mp4#video(3) will play only the third video track in a complex mp4 file.
Video: #video, #video(1), etc.
Audio: #audio, #audio(1), etc.
Image: #image, #image(1), etc.
Further information is available in the help files and at this Web site, which also includes demonstrations of the Java applet player.
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更多内容请访问IBM官方网站
http://www.alphaworks.ibm.comhttp://www.lmtw.com/tech/tk4mpeg4
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