MOCHA AE - Does it do image stabilization?

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—Quote (Originally by J-P)—
Consider it considered :wink:

Here are the steps to use the tracking data (transform data) for stabilisation with rotation and scale:

  1. Export as After Effects Transform Data
  2. Paste onto the required layer in After Effects
  3. Delete the position key frames
  4. Select the rotation channel and click Animation | Add Expression. In the expression box type the formula:

Code:

rotation*-1

  1. Select the scale channel and click Animation | Add Expression. In the expression box, type in the formula:

Code:

x = 10000/scale[0];
y = 10000/scale[1];
[ x, y ];

Hope this helps,

J-P
—End Quote—
Hey J-P, I followed this with a shot of a city, the scene panned across the hole city, what I did to track it was put the tracker on one of the buildings, then when it was about to go out of frame switch it to another building. When I get into AE and do the above the scene stabilizes but theres alot of black at the edges (normally i’d just crop) but then it continues to leave the frame completely as it pans.

Could you explain further what to do after this for a shot like this? Also, is there a way to keep the edges without cropping?

here’s the clip:

http://dl.dropbox.com/u/4289924/files/videoplayback.mp4

—Quote (Originally by J-P)—
Consider it considered :wink:
Here are the steps to use the tracking data (transform data) for stabilisation with rotation and scale:

  1. Export as After Effects Transform Data
  2. Paste onto the required layer in After Effects
  3. Delete the position key frames
  4. Select the rotation channel and click Animation | Add Expression. In the expression box type the formula:
    Code:

rotation*-1

  1. Select the scale channel and click Animation | Add Expression. In the expression box, type in the formula:
    Code:

x = 10000/scale[0];
y = 10000/scale[1];
[ x, y ];

Hope this helps,
J-P
—End Quote—
Hey J-P, I followed this with a shot of a city, the scene panned across the hole city, what I did to track it was put the tracker on one of the buildings, then when it was about to go out of frame switch it to another building. When I get into AE and do the above the scene stabilizes but theres alot of black at the edges (normally i’d just crop) but then it continues to leave the frame completely as it pans.
Could you explain further what to do after this for a shot like this? Also, is there a way to keep the edges without cropping?
here’s the clip:
http://dl.dropbox.com/u/4289924/files/videoplayback.mp4

Thanks for post. It’s really informative stuff.I really like to read.Hope to learn a lot and have a nice experience here! my best regards guys!

Thanks for post. It?s really informative stuff.I really like to read.Hope to learn a lot and have a nice experience here! my best regards guys!

The main issue here is you are tracking a long pan, so the tracker is going to follow along and then try to invert that movement when you stabilise.
To avoid this you have 2 options:

  1. Apply the stabilisation as normal to the footage but then parent it to a null that has the tracking data applied to it so the stabilisation inverts. You can then smooth the keyframe data on the null to remove the small bumps.
  2. Try the full version of mocha V2 and use the stabilise module to only stabilise subtle motion across a number of frames rather than locking the whole shot.

The main issue here is you are tracking a long pan, so the tracker is going to follow along and then try to invert that movement when you stabilise.

To avoid this you have 2 options:

  1. Apply the stabilisation as normal to the footage but then parent it to a null that has the tracking data applied to it so the stabilisation inverts. You can then smooth the keyframe data on the null to remove the small bumps.
  2. Try the full version of mocha V2 and use the stabilise module to only stabilise subtle motion across a number of frames rather than locking the whole shot.