-
After Effects + Mocha – face replacement problem
Hello,
I’m doing a face replacement task in After Effects CS5.5 and Mocha plugin. I’m following thetutorial by Lesterbanks:
https://lesterbanks.com/2011/06/face-replacement-using-after-effects-mocha/I’m trying to replace the face of the guy from the movie with my own face.
I have the layers as in the tutorial: bg (the movie with the guy) face (vid with my own face)and track which is copied info (mapped face) from Mocha plugin.
I do all the steps as in the tutorial but in the end my face does not follow the face of the guy
(his face moves a bit and there is a slight zoom following – my face should also grow bigger as
the zoom takes place, but it stays the same size as in the beginning).
Here are screens how does it look on my PC:
https://img829.imageshack.us/img829/9991/66090705.jpg
https://img525.imageshack.us/img525/8934/58871993.jpg
So, as you see on the second screen, the face doesn’t follow the actor in the correct way.
I think I did everything the same as in the tutorial, so I have no idea why this is not working.
I need help in detecting what went wrong here.
Thank you very much in advance.
-
6 Replies
-
It seems that you did not tick the scale parameter in the mocha track. I don’t see any keyframes in your AE comp.
-
It is not the problem with the scale parameter – I ticked it and pasted the whole tracking data from Mocha for both the guy’s face and my face.
I pasted them again to make sure and it still doesn’t work.
-
You may need to delete the anchor point keyframes.
If you want o get in touch with mocha product support specialists, log your case here: https://www.imagineersystems.com/contact_form
Best,
RossRoss Shain
Imagineer Systems
http://www.imagineersystems.com -
Thanks for the contact.
Could it be the case that the when 2 videos have different dimensions/resolution/fps they don’t work properly together?
-
Ok, I located the source of the problem – I had to time stretch the layer with the pasted mapped data from Mocha.
The face didn’t follow the actor fast enough (it was lagging behind), so I changed the ‘stretch’ parameter from 100% to around 40% and it matched the movement appropriately.Although, I don’t have the idea why I had to change the stretch – the tutorial didn’t mention it. Could the fps be the source of this? (the movies both have 25 fps, but the mapping in Mocha was done in 10fps)
-
Yes – this is the issue. mocha and AE project frame rate and image dimensions “always” have to match to insure the data lines up properly.
Best,
RossRoss Shain
Imagineer Systems
http://www.imagineersystems.com
Reply to this Discussion! Login or Sign Up