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Rotobrush Equivalent

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Ryan CastleRotobrush Equivalent
by on Oct 25, 2011 at 10:59:59 am

I know that rotobrush is the best tool for rotobrush, but my computer is an older one, and is not compatable with CS5. There is a program called Fluid Mask that does is, but that only works with still images. Is there a program, in or out of After Effects, that works with a video file, and automatically make adjustments by itself, like rotobrush?

Thank you.


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Roland R. KahlenbergRe: Rotobrush Equivalent
by on Oct 25, 2011 at 2:16:37 pm

I don't think so. Ages ago, Premiere could export a file format known as the Filmstrip format. You could then use Photoshop to open up the file and use Photoshop's Magic Wand but you wouldn't have the tweaks available in Rotobrush.

I suggest that you not feed stills, one at a time, into Fluid Mask as this will inevitably lead to 'boiling edges' - where the edges of a matte differ greatly, from frame to frame.

Perhaps, you can post your footage into your COW post so that we can have a look at it, and then to allow us to provide viable suggestions.

HTH
RoRK

Intensive AE & Mocha Training in Singapore and Malaysia
Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer


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Todd KoprivaRe: Rotobrush Equivalent
by on Oct 25, 2011 at 3:25:02 pm

As Roland suggested, the primary problem with using techniques that work on single frames is that the mattes differ from frame to frame in a way that causes the edges to be very obvious. That's the real innovation in Roto Brush: It maintains "temporal coherence"---meaning that the matte in one frame depends on the matte in the next and previous frames, so there isn't the "boiling" that Roland mentioned.

If you're doing any professional work, you really need to have a 64-bit computer. The time that you'll save because of improved performance and new features (not just in After Effects, but in many programs) will pay for a 64-bit computer very fast.

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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
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Roland R. KahlenbergRe: Rotobrush Equivalent
by on Oct 25, 2011 at 5:45:11 pm

Good post Todd. I was envisioning the original poster jumping in on individual frames to manually clean up a few frames after an instance in auto mode. This will almost always result in boiling.

There is also the issue of chattering, where the edges flutter in a consistent yet incorrect manner relative to the intended edge. Although this is prevalent in noisy source footage used for keying, a 'poor' keying algorithm, especially one not suited for temporal keying may exhibit such artefacts.

FWIW, if you have CS4, then Mocha was a bundled software. There are lots to like with Mocha for similarly challenging jobs. Perhaps a video of your footage will allow us to provide you with better assistance.

HTH
RoRK

Intensive AE & Mocha Training in Singapore and Malaysia
Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer


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Ryan CastleRe: Rotobrush Equivalent
by on Oct 25, 2011 at 8:18:42 pm

I want to capture the eagle statue panning down in this movie, just up to 0:00:14







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Todd KoprivaRe: Rotobrush Equivalent
by on Oct 25, 2011 at 8:27:36 pm

That is a remarkably easy rotoscoping job. You don't need Roto Brush or anything like it at all. The subject isn't changing shape at all---just moving in a straight line. Just draw a mask around it and animate the position of the matte. The animation of the position is probably best accomplished by tracking.

Here's a video that shows the gist, and your job is even easier, since you probably don't need to animate the shape of the mask:
http://tv.adobe.com/watch/learn-by-video/adobe-after-effects-cs5-motion-tra...

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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
---------------------------------------------------------------------------------------------------------


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Ryan CastleRe: otobrush Equivalent
by on Oct 25, 2011 at 8:32:56 pm

Can this method be used for someone waving their hand?


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Todd KoprivaRe: otobrush Equivalent
by on Oct 25, 2011 at 8:39:20 pm

Yes, conventional rotoscoping (animating masks frame by frame) can be used for someone waving their hand. It gets really tedious, but it's the way that such things have been done for decades.


---------------------------------------------------------------------------------------------------------
Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
---------------------------------------------------------------------------------------------------------


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Roland R. KahlenbergRe: Rotobrush Equivalent
by on Oct 26, 2011 at 2:55:21 am

MochaAE/MochaPro will do this quickly; the rotoscoping as well as the tracking, both at one go too!

I believe that Adobe has an existing upgrade promotion for CS5.5. Even if you do not have a 64-bit machine, CS5.5 comes with CS4, which is 32-bit. And CS4 comes with MochaAE which will safe you lots of time as well as your butt on rotoscoping or tracking jobs.

HTH
RoRK

Intensive AE & Mocha Training in Singapore and Malaysia
Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer


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