TQuickTimeMovie is the QuickTime movie file abstraction. A QuickTime movie contains one or more sequences (audio or video) and information about the movie.
NOTE
Currently, when you stream a movie, only the name is streamed. Also, at this time you can only append frames to the end of a QuickTime movie, you cannot insert or remove frames. If you stop appending, the key sequence resets.
Key frames and key sequences
A key frame defines the starting point for part of a temporally compressed sequence.
Subsequent difference frames depend on the previous key frame--they contain only the image information for the parts of the frame that differ from the key frame.
A key sequence is a key frame followed by a series of difference frames.