Help with stabilizing a clip where it moves from one point to another.

[keanu_6740]

I've been trying to figure out how to track/stabilize this clip but I've been finding it difficult as the clip first starts off focusing on the air vent of this Lamborghini Aventador but then moves down to the emblem on the rear wheel.

Here is the link to the clip:
Clip 

So my question is, how can I track/stabilize this clip, locking on to both points?

Thank you in advance 🙂

[Rick Gerard]

The white car has very little detail. You'll have to pick things like the air vent and track that in Mocha AE until some other object with significant detail comes into the shot. Then, you need to add a second track. Mocha is a planar tracker, so the objects you track need to be co-plainer (on the same plane). The tire would be a fairly good choice. 

To give you a detailed answer, we need to know what you will do with the tracking information. If you want to put a logo or something similar on the Car Door, then you only need to track the part of the shot that shows the surface you want to modify. If that part of the car will not track, you need to find another part on the same plane that will. 

That is going to be a very difficult shot to track because it was not shot with tracking in mind.

[keanu_6740]

Hey Rick, thank you for your response 🙂

I'm going to create a speed-ramp car edit with this clip being used in the video. I always track/stabilize my clips to ensure my speed ramps are smooth and focused on an object. 

I have seen many car edits with a very similar camera shot, and the editors always make the clips similar to the one above super smooth and locked on. Would maybe the use of a Null Object help?

I've attached 3 files from some edits to show you what I mean from above.

And in terms of finding an object to track, even with very little detail, I usually just track the camera, pick some points and then create a solid and camera, in which I'll pre-compose the solid, create a shape, and then use that as a tracking point for me to use. But thank you for the Mocha AE method.

[Rick Gerard · Accepted solution]

I would start by Pre-composing the trimmed shot in the timeline, moving all attributes to the new comp, and trimming the comp. Then, I would switch to the Motion Tracking workspace and apply Warp Stabilize. Change the settings by turning on Preserve Scale, Advanced/Detailed Analysis, and Advanced/Rolling Shutter Ripple/Enhanced Reduction. 

That should give you about as smooth a shot as you can get with minimal cropping..

The gif looks jumpy because it is only 8 fps.

Then, create a new composition longer than the clip, drag your Warp Stabilized comp into the new comp, and apply Time Remapping to create your speed changes.  Just applying time remapping Time Remapping to a Warp Stabilzed clip will not work.

If Warp Stabilizer takes a long time to run or your computer just barely meets the minimum system requirements, I recommend that you use the Composition-Pre-render menu to pre-render the Warp Stabilized shot before you try time remapping. The Rendered comp will not loose any quality if you use this workflow.

[keanu_6740]

I just used you method and wow, looks 10x better than the orignal clip!

Thank you very much Rick for your help, very much appreciated 🙂