Century Optics 16:9 Converter Lens on Askew

[t_2]

The Problem: We are making a DV film and we use a 16:9 converter so that we save our resolution. Recently we spent an entire day preparing for a one hour shooting session.

This was footage for a special effect and involved conditions which would be hard to repeat. The camera was suspended from a boom and rotated constantly around the actors being filmed. The problem, looking in the small LCD neither the cameraman nor I noticed that the converter lens was on askew by about 20 or 30 degrees until rather late into the filming.

The Solution: Any Ideas??? The distortion introduced here makes you think that the world isn't flat, but it's somehow more complex than simply rotating the video again. I have seen some amazing things done with General Convolution. Could this be a solution??

Thanks,

t_2

[sh0dan]

Do you have a sample frame?

[Mug Funky]

hmm. this is like the Copycat agoraphobia scene, yeah?

this MAY be fixable by skewing rather than rotating, but generalconvolution wouldn't work unless you had a matrix the height of the frame and the width of your skew (or at least a perfect fraction of it). and then it would blur your image quite a bit...

i'm not sure if there's any kid of warping tools for avisynth, but there's a tool for shifting lines. unfortunately this is by whole pixels so the effect would be rough (to say nothing about the 576 operations needed to do 1 frame).

i think you'll need after effects on this one...

[t_2]

@Sh0dan: I have one but how can I put it here?

[sh0dan]

If it is possible to you to put it on a webpage, you can link to it from here. Otherwise PM me.

[t_2]

Here is a link to a frame:

http://www.communio.hu/stella/teodorkepe01.jpg

Of course things look more distorted in video where everything is in moton. I used Smart Deinterlace on it and bicubicly resized from 720x576 to 832x468.