Animated Overlay Slides Around

Bloodsong13T wrote on 10/30/2016, 8:02 AM

heyas, guys!

 

   i'm trying to insert something into a moving shot (ie: put my logo on a sign, put a moon in a pool of water), and no matter how carefully i keyframe the sucker, it 'drifts' or 'slides around' and looks totally fake.  i drove myself nuts one day actually keyframing every single frame of the shot, to get the overlay placed exactly, and it still looked horrible.

   i was using Vegas 10 Platinum (i have been for a few years, but i'm still an amateur), and i tried image stabilization on the base video clips, but... though the background motion was smoother, i couldn't get the overlay to stop 'slipping.'   now i have the 14pro trial (and image stabilization is an extra not included in the trial, apparently?).  or do i need motion-tracking instead?? gah!

 

   is there a secret trick to making something like this work?  right now, i'm blending two shots, and one needs to be pan/cropped to fit with the other, and i'm still running into the jinking and sliding around effect.  i have 'quantize to frames' turned on.  should it be turned off?  or something else, like... i dunno; the framerates of the clips are different?  offset??  or something to do with interlacing or resampling?

any ideas?  thanks a bunch!

 

Comments

set wrote on 10/30/2016, 9:11 AM

You need motion tracking application in order to match an image into the moving shot. Vegas Pro Suite include Boris Continuum Unit - Match Move, but I personally haven't tried this - so I'm unable to comment this one - but you can work inside the same application.

The alternative you can try is HitFilm 4 Express. Editor specialized for Visual FX, so they have tracking ability.

Here's one example I did:

(Result from following the FutureLearn Visual Effects for Guerrilla Filmmakers Free Online Course)

Last changed by set on 10/30/2016, 9:13 AM, changed a total of 1 times.

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Bloodsong13T wrote on 11/7/2016, 7:42 AM

heyas, thanks!

   actually, i ended up fixing it...  when i played it back at 15% speed, i noticed that the base clip was moving for 3-5 frames, and then stopping for one frame.  (probably because the original film was 29.whatever fps and the clip/video was 30 fps...)

   so i sorta brute-forced it.  for the added clip, i created keyframes before and after the frozen frame, then set the first keyframe to hold.  (oh, i also think it helped that i exported the added clips in slow motion, instead of time-stretching them right in vegas; so it had more frames to work with.)

   not a real optimal solution, but for my quick and cheap hobbyist work... at least it solved my problem!

thanks for the links, too!