sample light ray effect

djcc wrote on 1/15/2004, 9:29 AM
I uploaded a VF file of a few of my favorite light ray effects. Granted, not as impressive as the star wars effect by Al, but I thought he started a good idea, and thought I would throw something out there as well.

Interesting note: While constructing this quick VF, I unintentionally created a neat wobble effect. It was nothing I tried to do, it just happened. I was able to recreate the effect and can explain it if anyone is curious, unless, you figure it out on your own.

=Don=

Comments

djcc wrote on 1/15/2004, 2:34 PM
Hmmm... I guess I was the only one confused by the "wobble" effect....
mmreed wrote on 1/15/2004, 4:04 PM
very nice effect.

allyn wrote on 1/15/2004, 4:47 PM
thanks for posting this. i'm a newbie movie studio user and i keep being amazed by what it can do!
dfstrasser wrote on 1/15/2004, 5:58 PM
Where can this be seen? Sorry, I'm new here.

Thanks,
Ex-Studio User
djcc wrote on 1/15/2004, 6:31 PM
Chienworks has a nice site, primarily for vegas users, but also has some MS stuff as well:

http://www.vegasusers.com/vegshare

So, Can anyone explain how the wobble/bouncing effect is even possible? It occurs within a single video event (although, I duplicated the effect twice, back-2-back).....
Chienworks wrote on 1/15/2004, 8:19 PM
I'm not sure if i know exactly what you're referring to as the wobble, but there are times when the text is rotating where the light rays will fluctuate (in particular, 0:03 -- 0:08). This looks like it's due to the fact that video is made up of an orthogonal grid of pixels. When a line rotates on this grid it ends up "stairstepping" while the angle changes. This means that the edge of the line varies and the thickness will also modulate through different amounts of pixels. The light rays effect is very sensitive to both the edge shape and the line width. Since these items vary in a repeating pattern while the text rotates, the light rays will follow this pattern. The difference is that the effect shows a much more magnified variation than the text does. If you were to turn off the light rays effect you probably wouldn't notice the wobble at all.
djcc wrote on 1/15/2004, 8:59 PM
It has nothing to do with the light rays. I uploaded a second version to vegasusers.com... all light rays have been eliminated. This version has only 2 video events, but both are identical (only used 2 to extend the length).

I think doing this must be some kind of loophole in the software..... Look carefully at the variables on the pan screen.... the angle of rotation is 90 degrees, but the crop box is NOT rotated 90 degrees at all!
Chienworks wrote on 1/16/2004, 5:28 AM
I see that now. That is very bizarre. I hope some of the programmers take a look at this one.

http://www.vegasusers.com/vegshare/textdisp?djcc-wobble
djcc wrote on 1/16/2004, 5:37 AM
I'm not sure I want the programmers to fix it!! :o)

I made it happen by rotating the crop box 90 degrees then zooming in the crop box to a single point on the "begin" tab. The "end" fo the pan/crop tab was left at a full size, non-zoomed frame.

Returning to the "Begin" tab, If you then grab a corner of the crop box, and drag it through the center of the frame, the crop box will begin to enlarge (zoom out)... depending on how you move through the center, you can get different results, including thing like flipping the image upside down, mirror, etc. In one of those attempts, quite by accident, I ended up getting a crop box that looked to be perfectly normal... the "F" was right-side up, everything looked normal. Except for one small detail - I had NOT rotated the crop box back to 0 degrees!! The result is this wierd bounce effect. It took me awhile to recreate it, but I was able to do it after screwing around... I think I did it by dragging through the center, possibly in a diagonal direction.... if that makes sense....

=Don=
mmreed wrote on 1/16/2004, 6:37 AM
yeah - thats a glitch... it should not behave that way... it does need fixed because it impacts the intended use of that feature.

Anyone from Sony reading this thread? can you comment on if this has been added to the bug fix list so we know to stop bugging <grin> you.


Chienworks wrote on 1/16/2004, 8:40 AM
Yes, it should be fixed so that people can generate the correct effect if they want to. The "wobble" could still be produced (though not as easily) if the Pan/Crop function worked correctly.
djcc wrote on 1/16/2004, 9:47 AM
I'm confused - other than this side effect, how is it that the pan/crop function is not working correctly?? Other than this anomoly, I have never had the pan/crop function produce anything other than the exact effect I anticipated.
Chienworks wrote on 1/16/2004, 10:33 AM
Did you expect to get the wobble from what you did? No? Then it didn't work correctly. It should have zoomed while rotating 90° since this is what you set up with the Pan/Crop parameters. What if someone else wants to zoom while rotating 90° but can't because they get the wobble instead? Any other behavior is a bug that should be fixed.
djcc wrote on 1/16/2004, 12:11 PM
Actually, rotating 90 degrees while zooming worked just fine..... the first VF I uploaded shows that..... The wobble effect was NOT an attempt to zoom and rotate - quite the contrary. I had made a copy of that first event which does rotate 90 degrees and zooms from 0 to full frame. I was going to remove the rotation and zoom completely from the pan/crop "begin" tab to match the "end" tab. I would have then had the event merely fade the light ray effect from where it ended in the prior event to zero (which, in my first upload, it does just after the "wobble" effect.

It was while trying drag the crop to full frame that I created the end "wobble" result by accident.... I had not noticed until later that the rotation angle still read 90 deg, and the size still reads 0 x 0, even though the cropping frame clearly shows a full frame image without rotation.

Clearly its a loophole somewhere, but I would imagine it is one very few people would ever come across.... I had difficulty initially just trying to recreate it.
SonySCS wrote on 1/16/2004, 2:50 PM
I'm having trouble recreating -- I'm probably not understanding or missing something. This is what I did

In text media Pan/Crop effects I opened properties
Set angle = 90 and set size = 0x0
Use this to Begin
Go to End and set Pan/Crop to default.

I get large text twisting in and getting smaller until it is normal.

Thanks,

Suzan

ADinelt wrote on 1/16/2004, 5:05 PM
That was pretty neat, but I have one question.

How do you get the effect of zooming in and out in one clip? I thought you could set a Starting position for the Pan/Crop then an End position and SB would fill in the gaps. According to what I read in the manual, if you wanted to accomplish a zoom in then a zoom out, you had to split the frame and apply two different Pan/Crop effects. Or is this part of the loop-hole?

I really do like the effect though.

Thanks...
Al
JReed wrote on 1/17/2004, 4:14 AM
The wobble effect may be due to the software reading bezier keyframes as opposed to linear keyframes...I'm not sure what the default keyframe setting is...sometimes the software, when faced with multiple moves and sizing parameters, will "shortcut" itself to achieve the end result in the most expedient manner... sometimes this creates undesirable effects like bouncing and wobbles.
djcc wrote on 1/19/2004, 9:38 AM
Suzan -

I rotated the text 90 degrees by dragging the crop frame. I then reduced the crop frame to a single point (ie size 0x0), also by dragging the crop frame. Then, grab what is now a single point crop frame, and drag it to the upper left.... the crop frame will increase in size, but the properties of 0x0 and 90 degrees will NOT change.... If all this is done on the "begin" tab, and the "end" tab is set to default, the wobble effect is created.

I should add that I have been able to generate additional, unexpected, results through the manipulation of the crop frame while the properties remain unchanged, but the common denominator seems to be reducing the size to 0x0 and having some rotation. The rotation value also seems to have an effect... 90 degrees works as I demonstrated, but other angles have produced different results.

=Don=
SonySCS wrote on 1/20/2004, 1:41 PM
Got it. Thanks.
Suzan
djcc wrote on 1/20/2004, 4:04 PM
No problem Suzan... did I win this week's prize of a free copy of Vegas? LOL!

=Don=