[Tig] encoding for quicktime/web

[Adrian Thomas]

On Feb 2, 2007, at 17:58, Bob Friesenhahn wrote:

>
> Note that "Quicktime" is not MPEG4.  MPEG4 is a compression method  
> used by some variants of "Quicktime" as well as an international  
> standard video stream for other uses as well.  "Quicktime" is just  
> a container format.

Not true. MPEG4 is a container format just like QuickTime (and  
actually based upon QuickTime structures). MPEG4, like QuickTime,  
supports many different CODECs for audio, video and other content (as  
we know, QT supports sprites, Flash, timecode, text and God-knows  
what else). You can make a QuickTime movie using several audio and  
video CODECs that MPEG4 also supports - such as H.264 video and AAC  
audio. Just to put the tin lid on it all, QuickTime supports the  
creation and playback of MPEG4 containers (in various profiles) too.

Incidentally, Rob, you should NOT need any additional QT CODEC to  
have QT 7 decode H.264 video tracks, so I'm not sure what you made  
there with VisualHub (which is a great little app if making podcasts  
is your thing).

--
Adrian Thomas
AUTOMATIC TELEVISION
LONDON UK WC2N 4DU
www.autotv.co.uk
+44 (0) 20 7240 2073
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