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Old 23rd September 2012, 11:58   #13  |  Link
martin53
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Join Date: Mar 2007
Posts: 407
Quote:
Originally Posted by Chikuzen View Post
Do you have any inconvenience in Reform?
Yes, like I mentioned in the thread starting post.
This script also crashes at my site in AvsPmod and VirtualDubPortable:
Code:
ColorBars()
Skew(last, ltopx=3, ltopy=3, lbotx=3, lboty=477, rtopx=637, rtopy=3, rbotx=637, rboty=407)
#Scriptclip("Skew(last, ltopx=3, ltopy=3, lbotx=3, lboty=477, rtopx=637, rtopy=3, rbotx=637, rboty=407)")
At the moment, it crashes right at the start. But there were times when it started playing successfully, crashing only after some dozen frames.

If it works as presented, move the comment marker one line up and try again.

Also less convenient with skew:
- All coordinates must be inside the frame range, and even some pixels away from the corners. So a frame that is to be 'almost not' transformed must still be padded somehow, and the padding color will leak into the result, I suspect. Quadrilateral allows skew, deskew and more in one function.
- Quadrilateral's interpolation looks better to me. With skew I remember seeing stairsteps.
- Quadrilateral's transformation allows real projective mapping , while the reform documentation says 'meant for minor distortions'.
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