How come when you have a DVD-VOB, the black bars change size inbetween scenes? Like for "The Simpsons", there might be 4 pixels of black bar on the right side of the screen. However, fast forwarding to another scene might give you 6 pixels and yet another 2.
Why? Shoddy work when transferring to DVD? I can't imagine them airing TV episodes with fluctuating black bars.
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No, it was the other way around...
As much as engineers tried (in those days) to calibrate their systems, there was no way to always, consistently give an in-focus, rectilinear (not curvature-distorted), wall-to-wall/edge-to-edge signal to the tube. Good thing about tubes was that it was EASY to adjust the overall deflection voltage to adjust the screen size and position (as witnessed on menu settings of modern PC CRT monitors). So---just hide the mistakes.
Now, the "mistakes" are much, much less. But they're there. You just found one.
Originally Posted by Cornucopia
Originally Posted by gadgetguy
PS: The problem is similar to editing on GOP edges in MPeg2. Composite PAL video must be match edited to a eight field sequence (4 Frames). NTSC has a 4 field sequence (2 Frames). Get that wrong and the picture jumps in H position at the edit.