QuickTime does more than just act as the multimedia participant that permit you watch those video clips on the Internet your co - workers are always forwarding to you . When you launch a video New World chat using iChat AV , edit video recording clips in iMovie or encode audio files in iTunes , you ’re trust on the QuickTime computer architecture built into Mac OS X. So it ’s important to look back the new features in QuickTime 7 , the updated program that ship with Tiger .
Perhaps the big forward motion in QuickTime 7 is the gain of the H.264 video codec ( compressor / decompressor ) . Similar to how the AAC audio codec in iTunes creates well - sounding euphony than the MP3 codec at the same file size , H.264 bid very high - quality video at much lower bitrates than other codecs . With H.264 — part of the MPEG-4 standard — you get the same quality as MPEG-2 TV at one - third or one - one-half the data point rate . What ’s more , you’re able to create full - solving HD video at rough the same data rate as today ’s received videodisc ( 8Mbps ) .
H.264 is also a scalable codec , meaning it works equally well for message for cell phones and high - definition video , and everything in between . ( You ’ll also observe the tycoon of H.264 in Tiger ’s updated variant of iChat , which produce estimable TV and allow for multi - person chat . )
The QuickTime 7 Player also add some nice features . Full - concealment ascendence let you fiddle , pause , stop , fast - forward , or rewind a movie , as well as adjust volume and bush through a movie — all while remain in full - CRT screen style ; antecedently , you had to switch out of full - cover mode to make any readjustment .
QuickTime 7 also feature resilient windowpane resizing , which go on playback smooth and continuous when you conform the player ’s window — it actually stretch out or compresses in front of your oculus rather than jump from one sizing to the other . This addition , along with many other QuickTime 7 improvements , comes courtesy of Apple ’s new Core Video engineering science , which allows for computer hardware - accelerated TV processing .
Finally , a new A / V Controls window ( prove on the right hand ) offers Jog Shuttle controls , for determining how quickly you jump forrard or back through a movie ’s build , and a new Playback Speed slider to slow up down playback to one - half pep pill or quicken the pace by up to three times .
whole Modern to QuickTime is the power to quick capture and partake motion-picture show from an iSight or other FireWire - based camera . The Share command in the File menu bid several default sizes for compressing your movie to sequester to east - mail messages or post to your .Mac Web site .
And while the DVD Player in Panther added multi - channel audio output for watching videodisk , QuickTime 7 is the first version to offer surround - sound through the QuickTime Player itself . That means any app built on QuickTime can take advantage of QuickTime ’s surround - sound capacity . ( As with past versions of QuickTime , to upgrade to the pro adaptation , you ’ll need to pay $ 30 . )
