Stabilizer and 3d tracking not cooperating?

Question

Hi everyone, first post here.I have this issue that's driving me mad and i don't know how to fix this or why it shows up, i'll try and explain (also, i'm italian so sorry in advance for any language barrier related problems): I have a clip in Premiere Pro, i need to stabilize and ad 3d tracking for some text.No issues about stabilizing in premiere pro, same for 3d tracking in After Effects, everything works smooth without a problem.The issue pops up when i try to stabilize in PP, then right click on the clip and select "replace with After Effect composition". As soon as AE launches a red banner appears in both PP and AE which says "3d camera tracker analysis does not work with collapse transformations" or "stabilizer analysis does not work with collapse transformations" (here's the italian version if the translation isn't correct and you want to give it a try "analisi tracciatore non funziona con comprimi trasformazioni", "analisi stabilizzazione e alterazione non funziona con comprimi trasformazioni" )How do i fix this? Why does this banner show up? Thanks to whoever can help me! i'm using the latest versions of both software

Rick Gerard · Answer

When you motion stabilize in Premiere Pro then create a comp from the selected footage the comp that is created pre-composes the original footage and turns on collapse transformations. You either need to remove the stabilization in Premiere Pro and do all the work in After Effects or dive into the nested comp and do the camera tracking in After Effects.

When you do camera tracking you will always get better results if you use the original footage. Warp Stabilizing footage distorts geometry. It has to. There is no way around that. This reduces the accuracy of Camera Tracking.

The proper workflow:

Set in and out points for the footage so you don't waste time Camera Tracking frames that don't need to be processed
If you need to mask parts of the footage to improve motion tracking or increase the contrast of the footage to get better results duplicate the footage, add your masks and effects, pre-compose, then run the camera tracker and:
1. Verify the accuracy of the track by checking the Effects Control Panel settings and trying various options to get the smallest error
2. Set an origin and ground plane
3. Create a camera and Solid using the same points and make it a guide layer
4. Set a layer marker on the frame where the Solid and Camera was added
5. Verify the accuracy of the track - adding a grid to the reference solid often helps
6. Add all other solids or text layers you need to the shot and verify their accuracy (I never use nulls because you can't see them when you preview and it's impossible to tell if they are accurate
Turn off the Pre-composed copy of the footage if you added it
Use Shift + Parent to attach any other graphics or text layers to the reference tracking solids you added
Add any lights and shadow catchers you need to the scene
Pre-compose all 3D layers, lights, and the camera so the composite is complete
Run Warp Stabilizer on the Pre-comp so the distortion and stabilization is applied to the entire composite

This is the only way to get a believable composite on footage that needs to be warp stabilized. Any other workflow will cause the added 3D elements to drift on top of the footage.

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