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Activity Forums Adobe After Effects roto help

  • Posted by Thom Obarski on January 8, 2008 at 10:35 pm

    Hey, long time fan of the site, first time poster.

    I’ve got this clip that has a tremendous boom shadow in it (appears 5 times over the course of 45 seconds) which of course is a transition shot between one setup and another so theres nothing to cut away to and picture’s locked.

    I’ve got it into AE and is all masked out, plus the last 3 shadows are already roto’d out (psd airbrushed still frame, motion tracked quick whip to null under mask) but the last 2 i can’t get a good track, or i can but there’s just too much movement and rotation in the shot (handheld of course) to get a still to stick.

    For these other 2 sections i’ve tried using the clone stamp inside of AE; but because of the incredibly shaky nature of the shot, it only works for a frame or 2 before one camera runs off one way and the other the other.

    My question i guess then is there any other workarounds for background replacement that i’m either doing wrong or have just neglected all together?

    Thanks in andvance,
    ~Thom

    Thom Obarski replied 18 years, 4 months ago 2 Members · 5 Replies
  • 5 Replies
  • Joel Jackson

    January 9, 2008 at 2:46 am

    can you post a QT file so I can take a look?

    Joel Jackson
    http://www.creativebloc.com/port.html

  • Thom Obarski

    January 9, 2008 at 3:10 am

    sure, it’s going to have to convert over-night so i’ll put up a b4 and after of what i have so far in the morning.

    Update: I was able to fill in 1 of the 2 remaining sections by using Andrew’s Multi-track matte Null as described in his set extension tutorial combined with multiple psd airbrushed stills changing the angle when the boom would be hidden by an actor’s arm. However the last section the boom never dips out even a little bit, so I’m going to try applying the multi-tracker to my single shot when i get back in in the morning and keeping my fingers crossed.

    Also a HUGE thank you to Andrew, your products and tutorials have saved my ass more than once, a thousand thanks!
    ~Thom

  • Thom Obarski

    January 9, 2008 at 5:54 pm

    Ok here’s what i got,

    The Before: Before

    And the After: After

    As you can see most of it i’ve gotten pretty well, just that last bit, maybe it’s because the steadicam is moving; and while i have a good track the scale isn’t catching as well. In fact now that I’m writting this I’m thinking I’m gonna try tracking with a scale point closer to the ground.

    Thanks!

  • Joel Jackson

    January 9, 2008 at 6:30 pm

    It’s so short that I’d clone tool roto each frame individually by setting the tool to a single frame duration and advance a frame at a time painting each frame in succession. With a good feather on the clone tool to minimize the shifting pixels on the edge it should work great. some frames you will be able to span with a single clone pass while other need individual attention. You have plenty of “leaf shadow and open ground” to sample from to cover the boom shadow

    A little more time consuming than a track but not more than you have already spent right?

    Does this help? More importantly does it make sense?

    peace,

    Joel Jackson
    http://www.creativebloc.com/port.html

  • Thom Obarski

    January 9, 2008 at 8:23 pm

    yeah it makes sense, and it’s a great idea if it weren’t for the steadicam constantly roving, my open ground and leaf cover is almost always at a different angle or depth than what i need, starting the new workflow like that is gonna be like finding a needle in a haystack, oh well three cheers for getting paid a day rate! lol

    On a side note, i know it’s hard to tell with this compression, but how do the other 4 look to you? Not too obvious?

    Thanks.

    ~T

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