FAQ
Q what is QT4Delphi?
A it is a porting of the Apple QuickTime C headers and utility code to Delphi / Object Pascal, plus a set of VCL controls to make the use of QuickTime in a Delphi application easy to people who don't know or don't want to mess with the QuickTime API. The core (headers and utility code) is now opensource and has been donated to the Delphi-JEDI organization. The QT4Delphi controls are commercial, but can be used for free in freeware applications
Q what is QT-JEDI?
A see the QT-JEDI website
Q I get the message File not found: 'DesignIntf.dcu'
A follow the instructions at this page, they say it works for Delphi6 and have tried it myself succesfully with Delphi7 (where you have to comment out one more codeblock compared to the Delphi6 solution described at that page)
Q what about the QTVRControlX ActiveX control?
A see the QTVRControlX FAQ
Q isn't there any more of FAQ?
A see the JEDI-QT FAQ