Hello.
I am looking for description about tapt atom, which has introduced
with QuickTime 7.1.
Do you have any pointer to documentations?
//
My app which uses Sequence Grabber, now create DV movie file with
tapt atom in video track.
DV movie recorded under QT7.0.x did not create tapt atom.
Now under QT7.1.2, tapt atom comes out.
This seems to have a few effect, but it's big issue to my quicktime
code.
* DV movie is shown in correct aspect ratio, 4:3 (640x480, DV-NTSC).
* DV track is shown with clean aperture applied (not 720x480, but
704x480)
* DV movie matrix now uses movie sizes as aspect ratio applied
(640x480, not 720x480).
* DV track clipping (crgn atom) uses sizes as aspect ratio applied
(640x480, not 720x480).
I guess my code should be change as :
* First of all, check if tapt atom is exist or not
* if it ISNOT, simply uses trackWidth and trackHeight.
* If it IS, convert calc basis of track width and height, with
clean aperture and aspect ratio applied
This method seems to be not smart way... There should be some good
API...
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