One of the additions to After Effects CS5 is their Roto Brush. This tool can be considered their quick shortcut to the tedious process of rotoscoping. How many times you want to extract something or someone in our video, mixing images from various videos. The Roto Brush provides a fast with very impressive results to achieve this goal!
After Effects CS5 includes Mocha, which is a far more ambitious follow-up, but the basic cuts and isolation of specific regulation of the objects that you will like the Roto Brush tool. Select the video, which is a good candidate for you. Choose something that you want to isolate the object of this exercise, and we will do something, something to distinguish it from the rest of the video processing. You can change the colors or apply a color effect, changing the tone, but choose something that is easy to work and influence, which is easy to distinguish.
There are many ways you can put Roto Brush tool to work for you, but we want this operation to show how it works in order to better understand the possibilities. Once the composition has created a short video, one of the comfortable isolation of the candidate, to copy the video, so you can apply this new effect of a single copy. Think of this as the effect of the mask, a smarter mobile, depending on the area selected mask.
Double-click to bring your copy in the window layer, which is where you apply the brush effect. Looking at your Tools menu in the right side, just left of the Puppet Pin tool, you will see the Roto Brush. It is easy to use and you basically just paint the inside of the object you want to isolate. In my case, I wear a black hat, I will paint the inside of the hat to "choose" it.
As you begin to apply with a brush, you will notice that the mouse pointer diagonally to adjust its size by making the brush size to large and small by choosing your destination. When choosing your theme, highlighted with a pink color scheme that shows what will be included. Like many other similar tools, ie the ratio of pixels used to make your choice, you can expand and improve its selection. If you have a domain you want to delete the selection, hold down the "alt" will move to a "subtractive" mode which allows you to highlight what you want to delete.
Once you are satisfied with the outline of your brush in the mask, the opinion of the "freeze" on the calendar in the layers panel. This will capture the selection. Also note the number of images selected in the timeline. You can drag this selection to the right or left to increase the presence of time your mask.
With the tent and the time you want to go back to your compose window and apply our selection to illustrate how something can be treated just the part that you have captured with your exercise Roto Brush. Remember that began with a copy of our original video and one for the application of this effect. In my case, I have isolated my black hat, and return in the composition, the effect applied to fill the "effects produce" turn the red hat. Applied to fill, now my black hat turned red with the length of time window was frozen "in the layers panel. Make sure the layer is applied and a Roto brush to apply this effect to Again, it is at the top of the copied layer. You want this to stand out. does not apply to the area selected for its Roto-brush, but appears only if the above the double layer.
Like all effects, which require more than understanding the impact Roto definitely requires some practice. By selecting "the most likely candidate" with a beautiful color and light is easy to distinguish the definition of the model will be of great help. In practice, this is a small tool, the new CS5 can go a long way to the flexibility of mixing and, in particular by applying a special treatment in some parts of the video.
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