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Compositing stock footage

Posted: Sun, 31st Oct 2010, 8:54am

Post 1 of 7

FXhomer57724

Force: 1000 | Joined: 28th Jun 2009 | Posts: 62

VisionLab User

Gold Member

Hi,
I got a few little problems here! I filmed a video outside in the daylight and used VisionLab to turn it into a night video! I used a stock footage of fire and resized it a little and there is like a white screen around the fire and you can see it in the video after it is rendered. How do you get rid of this problem?? Also, on the stock footage, lets say you put it in your video and go to vision lab and click on that affect where you can hit the drop down box for composite and click screen, I think it is right above it there is a color you can change and says Object Color, what is this and how to use it? Thanks for anyone and everyone that answers! Thanks!
Posted: Sun, 31st Oct 2010, 11:01am

Post 2 of 7

rogolo

Force: 5436 | Joined: 29th May 2005 | Posts: 1513

VisionLab User VideoWrap User PhotoKey 4 User MacOS User

Gold Member

I would try a few different blend modes (the dropdown menu you described) - most likely one of 'em will properly key your shot. If not, you may want to try adding a combination of a Value Key and Gaussian Blur (under Key, not Grade) to get rid of edges. To make your explosion 'fit in' with your footage, you can also try to add Light Spill and some smoke stock footage.

As for the blend modes, you can read up a bit on them here.
Posted: Sun, 31st Oct 2010, 12:11pm

Post 3 of 7

Joshua Davies

Force: 25400 | Joined: 21st Mar 2001 | Posts: 3029

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXpreset Maker Windows User MacOS User

FXhome Team Member

It might just be that the background of the stock isn't quite black, so its showing up. I would try altering the brightness and contrast of the stock clip itself. smile
Posted: Sun, 31st Oct 2010, 4:13pm

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Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Object Color is where you can change the color of the object on the timeline. Each layer has a certain color by default, but if you want to change the color, for organizational purposes or whatever, you can do so here.
Posted: Sun, 31st Oct 2010, 10:28pm

Post 5 of 7

FXhomer57724

Force: 1000 | Joined: 28th Jun 2009 | Posts: 62

VisionLab User

Gold Member

rogolo wrote:

I would try a few different blend modes (the dropdown menu you described) - most likely one of 'em will properly key your shot. If not, you may want to try adding a combination of a Value Key and Gaussian Blur (under Key, not Grade) to get rid of edges. To make your explosion 'fit in' with your footage, you can also try to add Light Spill and some smoke stock footage.

As for the blend modes, you can read up a bit on them here.
One of the little problems is, that these are the FXHome Stock clips: Special effects and Gore, but the gore has a white screen where th blood splatter is shot against, Had the same problem whit that clip also. So got any other advice on this? Thanks
Posted: Sun, 31st Oct 2010, 10:30pm

Post 6 of 7

FXhomer57724

Force: 1000 | Joined: 28th Jun 2009 | Posts: 62

VisionLab User

Gold Member

Axeman wrote:

Object Color is where you can change the color of the object on the timeline. Each layer has a certain color by default, but if you want to change the color, for organizational purposes or whatever, you can do so here.
Axeman, I sort of get what you are saying. The default on the screen is a blue and I change the colors to see what would happen and I could never tell any difference? Can you explain in a little more detail or somewhere I can read more about it? Thanks!
Posted: Sun, 31st Oct 2010, 10:52pm

Post 7 of 7

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

If the clip has a white background to begin with, change the Composite mode to "Multiply" to remove the background.

As far as the Object color, it only affects the color of the object displayed on the timeline. Perhaps, for example, you are working on a sequence involving three lightsabers of different colors, with multiple layers of effects for each one, and you want to be able to quickly tell which layer is which on the timeline. You could use the Object Color to make all of the layers used in the blue lightsaber display on the timeline in blue, make all the purple lightsaber layers purple, and the layers for the red lightsaber show up as red. It will have no effect at all on the effects themselves, as the display on the canvas, it only affects the timeline.

All video objects will display as blue by default. Try clicking the bar of color next to the "Color" label for one of these layers, and you will get a color picker window. At the bottom of the window is a selection of swatches; click on the bright green one. Once you click OK, look at the layer in the timeline, and you will see that the title bar as well as the bar representing the duration of the effect are now green. That's pretty much all the control does.