Jitter when stablizing from edit desk

[Ido]

hello, new to the community, im a new smoke editor, working on a 6.5 HD version on tezro
i am getting a wierd jitter when stablizing shots from the edit desk, when using any other function then shift function, all the fit to screen options like letterbox crop edges, and fill produce an odd jitter, whenever a motion is present making the shot unusable, allthough it does stablize the shot.

i tried using avrage and jitter on the frames, however allthough avrage does smooth out the overall motion the jitter remains
and jitter eliminates the jitter but the stablizing effect decreses.

any thoughts?

thanks in advance

[John Montgomery]

What’s strange is that shift works but the others don’t. Using fill could exaggerate any motion effects, since the image is essentially being resized. But I’m not sure why this would happen with letterbox.

Have you tried stabilizing in the DVE module? you can stabilize and then connect a global to it to increase the size — essentially filling up the frame.

Just a suggestion in trying to narrow down your problems

[Ido]

well i talked to the good folks at discreet and they agreed that this is caused by the fact those 3 feature use some sort of fit to frame method while shift just moves the image around. however im still waiting on a soild answer, tommarow i hope

i will try connecting the global in DVE
also as far as stablizing within DVE.
I have an hd shot that i need to stablize, to eliminate any motion from the shot i need to use the inverse rotation and inverse scale?
is that correct
the shot is moving in the Z axis while there is also shaking on the X&Y axis
so it should require both trackers correct?

thanks in advance

[Eduardo San Jose]

If you want to stabilize a shot, track 2 points, go shift of both shots and apply them negate. If you have a good track… you will fix it.

Cheers

[Eduardo San Jose]

I forgot to say size on and rotation on. Also you can do it in animation, pos, size and rotation.

[Andy Milkis]

Is this clip field based or frame based (interlaced or progressive)? If the clip is field based, or interlaced, make sure that the clip is flagged F1. You might be having a metadata conflict with scan mode. For example, you may have a progressive scan clip, but when you brought it in from tape, you had FIELD 1 selected. With this, you have a progressive clip, but smoke thinks it is interlaced. If this is the case, when you enter the stabilizer, it defaults to field based tracking and rendering. This could mean that artifacts are added when processing, since it is processing on fields.

I have also seen situations where mis tagged clips are interpreted by smoke as having the wrong field dominance, which could also introduce jitter.

HTH,

-Andy

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