QuickTime is a multimedia framework developed by Apple Computer Inc. That consists of a QuickTime player, the QuickTime framework which provides a common set of APIs for encoding and decoding audio and video and the QuickTime movie file format .MOV, the MP4 multimedia container is also based on QuickTime technology. The latest version of QuickTime is QuickTime 7, which brought about an H.264 encoder (baseline profile, 1 B-frame support) and decoder which supports Baseline, Extended and most of the main profile but not High Profile features. QuickTime 7 also brought multi-channel audio support for the MOV container.
The QT (short for QuickTime) video (and audio) container format is like AVI or ASF, because it doesn't define the actual compression technology the video has to use, but just defines the video structure instead.
Despite this, term QuickTime is normally used to refer to Apple's own video encoding technology that used to produce pretty bad video quality - something that could be compared to RealVideo format.
In 2002, Apple has started using MPEG-4 video encoding on its QT streams, producing much better, if not excellent, and video quality. Reason for this has been the huge demand from Hollywood to come up with an universal standard - such as MPEG-4 - that would produce good quality video for broadband use.
QuickTime is one of the oldest containers still in use. QuickTime is used by Apple's QuickTime encoding and playback software. It uses an extension of .mov andit's also very closely related to the MP4 container, which was originally based on this container. Video streams found in QuickTime containers are generally MPEG-4 AVC, with audio typically being AAC.
MP4 was based on Apples MOV (QuickTime) container, which they were already using for MPEG-4 content. Rather than using a different type of file for elementary (separate video and audio) streams, MOV and MP4 use the same container regardless of how many or what type of streams are stored in it. Apple's iTunes online music store made audio only MP4 files a common site for consumers. Although not all portable media players can read them, Apple's M4A extension (for audio only MP4 files) has become synonymous with audio.
Additional QuickTime Resources:
QuickTime Broadcaster - with QuickTime Broadcaster, anyone can produce a live broadcast event and anyone with an Internet connection can “virtually” attend. The combination of QuickTime Broadcaster, QuickTime Streaming Server, and QuickTime provides an end-to-end MPEG-4-based Internet broadcasting system, allowing you to reach not only the large and growing QuickTime Player base, but also any ISO-compliant MPEG-4 player.
HTTP Live Streaming - QuickTime X takes Internet video streaming to new levels with support for HTTP live streaming. Unlike other streaming technologies, HTTP live streaming uses the HTTP protocol - the same network technology that powers the web. That means QuickTime X streams audio and video from almost any web server instead of requiring special streaming servers, and it works reliably with common firewall and wireless router settings. HTTP live streaming is designed for mobility and can dynamically adjust movie playback quality to match the available speed of wired or wireless networks, perfect whether the video is watched on a computer or a mobile device like iPhone, iPad, or iPod touch.
QuickTime Streaming Server - Whether you want to add streaming media to your website or deliver distance learning, Mac OS X Server has all of the tools you need. With QuickTime Streaming Server, providing streaming services has never been easier.
Using the RTP/RTSP open standard, QuickTime Streaming Server lets you deliver live or prerecorded content in real time over the Internet. With Instant-On, your content begins to play as soon its link is clicked; there's no waiting for the file to download. QuickTime Streaming Server ships with Mac OS X Server
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