Shake smoothCam causes image to jump to the top left.

Question

Shake smoothCam causes image to jump to the top left.

I'm still trying to perfect this clip. I used the smoothcam node and used all of the advice that you guys have given me but I can't figure out how to fix this problem.....

http://idisk.mac.com/imacdoyou86/Public/smoothcam.png

What variables do you think I should be using for the translation smooth and rotation smooth? I think I might be doing something wrong because halfway into the clip the whole frame moves to the top left.

Here is a description of the clip - I'm walking into this room holding my camera and I pivot around to show the door I came out of. The floor in the room was hardwood so it was difficult to steady the camera as I was walking. So if you can imagine yourself walking and the camera is shaking up and down a lot. I don't use my zoom at all.

17" MacBook Pro, Mac OS X (10.4.7), 1GB of RAM

Posted on Aug 30, 2006 12:01 PM

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Answer 1

Dec 23, 2010 12:43 PM in response to Jeremy R. Williams

Does it move there to keep the content in the same place?

Patrick

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Answer 2

Dec 23, 2010 12:43 PM in response to Patrick Sheffield

Not the entire movie. It only happens to a couple of frames. I tied using the scaling node but it makes things too big. Can I try anything else?

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Answer 3

Dec 23, 2010 12:43 PM in response to Jeremy R. Williams

Yes, BUT, does it move there to keep the content in place - in other words, does it need to displace that frame that much to counter the camera shake?

Patrick

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Answer 4

Dec 23, 2010 12:43 PM in response to Patrick Sheffield

I guess so but if I watch the original movie in quicktime it doesnt appear to have THAT bad of a shake

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Answer 5

Dec 23, 2010 12:43 PM in response to Jeremy R. Williams

can you post the the clip before and after?

Patrick

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Answer 6

Dec 23, 2010 12:44 PM in response to Patrick Sheffield

Try this:

The clipMode parameter provides different ways you can treat the size of the output frame in order to include or exclude this black region. After you’ve analyzed the input image and picked the settings necessary to smooth or lock your shot, you can choose one of three clipMode parameters.

union

This option expands the rendered frame to include the full area within which the input image is transformed. If you scrub through the SmoothCam’s output with this option turned on, the image appears to float about within a black frame larger than itself. The frame size of the output image is larger than that of the input image.

intersection

This option contracts the rendered frame to exclude any black area. The result is a stable output image that fills the frame, but with a frame size that’s smaller than the input image.

in

This option maintains the frame size of the input image as that of the output image. The result is a moving black area that encroaches around the edges of the output image.

CaptM

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Answer 7

Dec 23, 2010 12:44 PM in response to Captain Mench

Can I use a scaling node with the intersection parameter to fix the size?

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Answer 8

Dec 23, 2010 12:44 PM in response to Jeremy R. Williams

Yes... but I actually like doing it with the IN mode. Then using a Move2D node to make small adjustments. But your way will work too.

CaptM

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Answer 9

Dec 23, 2010 12:44 PM in response to Captain Mench

I used the Move 2D node like you recommended but if I make an adjustment at one part in my movie it ruins another part. Is there anyway I can tell shake to only correct a certain part? Perhaps a keyframe?

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Answer 10

Dec 23, 2010 12:44 PM in response to Jeremy R. Williams

Yes -- keyframes.

I must say at THIS point... you need to take a look at the manual. There is LOTS of stuff in there.

But - turn the keyframes on by turning on the KEY on the leftish side of the viewer window. Any change you make on any frame will be recorded as a keyframe.

CaptM

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Answer 11

Dec 23, 2010 12:45 PM in response to Captain Mench

haha I have to admit I do feel like I'm taking advantage of the discussion boards. I think I learn better when I watch your movies Captain Mench!

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Answer 12

Dec 23, 2010 12:45 PM in response to Jeremy R. Williams

True true... It was easier 6 years ago when the only people on here were the ones learning the program for the first time themselves!!

However -- the key to successful manual management is knowing the right terms... and by stating KEYFRAMES you gave yourself away!!

hahaha!!

(but it IS a HUGE key over there!!)

CaptM

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