QuickTime 7 Player: Developers New invention

By: Firoj Khan

QuickTime is Apple's multiplatform, industry-standard, multimedia software architecture that provides tremendous development advantages on Mac OS X. QuickTime is a multimedia framework developed by Apple Computer, capable of handling various formats of digital video, media clips, sound, text, animation, music, and several types of interactive panoramic images.

Developers can now take advantage of QT Kit—the modernized object-oriented programming interface—to easily create QuickTime-savvy Cocoa-based Mac OS X applications. QuickTime enables you to manipulate, enhance, and store video, sound, animation, graphics, text, music, and even 360-degree virtual reality. And since QuickTime also provides file format converters for more than 250 common image, video, and audio file formats, you can support and convert new file formats within your application quickly and easily.

A QuickTime file (*.mov) functions as a multimedia container file that contains one or more tracks, each of which store a particular type of data, such as audio, video, effects, or text (for subtitles, for example). Each track in turn contains track media, either the digitally-encoded media stream (using a specific codec such as Cinepak, Sorenson codec, MP3, JPEG, DivX, or PNG) or a data reference to the media stored in another file or elsewhere on a network. It also has an "edit list" that indicates what parts of the media to use.

The ability to contain abstract data references for the media data, and the separation of the media data from the media offsets and the track edit lists means that QuickTime is particularly suited for editing, as it is capable of importing and editing in place (without data copying) other formats such as AIFF, DV, MP3, MPEG-1, and AVI.

Internally, QuickTime files maintain this format as a tree-structure of "atoms", each of which uses a 4-byte OSType identifier to determine its structure. An atom can be a parent to other atoms or it can contain data, but it cannot do both.

If you are running QuickTime 7 on Mac OS X v.10.4 with a video card capable of Core Image processing, the A/V Controls window will also display sliders that allow you to adjust video Brightness, Color, Contrast, and Tint.

Stream your live and on-demand media in real time to the desktop or mobile phone with this industrial-strength, standards-based server. Deliver everything from QuickTime movies to H.264 standards-based video to an internet radio station. QuickTime 7.1.3 is an important release that delivers numerous bug fixes and addresses critical security issues.

QuickTime 7 Player features a new window called A/V Controls that allows you to control aspects of the audio and video being played—from the Window menu, choose Show A/V Controls. With these controls, you can easily adjust the sound balance and volume, and make changes to the bass and treble response.

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