-
Need to create a matte out of footage w no alpha
A soda bottle spins around from full frame and the camera zooms out until the bottle is in the center of the frame. Problem is they didn’t provide a matte. The bottle is just on a black background. But of course since the soft drink itself is of a darker color this poses and interesting issue as well. I’m using AE CS3, what would be the most efficient way to create a matte for this? The footage is only 5 seconds long; can I create a batch in PS that will select the black area, create a alpha channel, close the current frame, open up the subsequent one and repeat the process until all the frames have an alpha? If there is a faster more intuitive way to go about doing this, I’d really like to here it. Hope this all makes sense, Thank you.
-
3 Replies
-
Can you pull a luma key from it?
You could try Auto Trace.
You could try the 30 day trial of CS5 and try the Rotobrush on it. (Read up on it first [link])
You could resort to traditional rotoscoping. Lots of tips and tricks here [link].– The Great Szalam
(The ‘Great’ stands for ‘Not So Great, in fact, Extremely Humble’)No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.
-
If it’s on a black background you could try using a Difference Matte. Just throw a Black Solid under the footage layer and use that as the Difference Layer.
It’ll need some fine tuning, sure, but it’s a start.
-
I appreciate all of the input. I opted to just go ahead and roto everything by hand. The shape of the bottle was consistant throughout so it wasn’t very difficult to do. I just hate when clients make my job more difficult than it should be. But oh well that’s what we over here call…”pain in the butt fee”…and it was just a 5 second tag so it wasn’t too much of a pain. The client didn’t have access to the matte and this particular client was so non-technical they didnt’ even no what a matte was or what I could possibly be talking about so I didn’t even bother to pursue the issue. Pretty much your typical client. Anyway, thank you all for your help.
Reply to this Discussion! Login or Sign Up