2012年11月3日星期六

after effects technique use Solid Layers

after effects technique use Solid Layers

after effects technique use Solid Layers
Solids are just right for this purpose, and for lots of other uses in After Effects. This video shows you how to create solid-color layers and walks you through some
Layers in the Layer, Composition, and Timeline panels
After you add a layer to a composition, you can reposition the layer in the Composition panel. In the Timeline panel, you can change a layer's duration, starting time, and place in the layer stacking order. You can also change any of the properties of a layer in the Timeline panel.
You can perform many tasks—such as drawing masks—in either the Composition panel or the Layer panel. However, other tasks—such as tracking motion and using the paint tools—must be performed in the Layer panel.
The Layer panel shows you a layer before any transforms are applied to the layer. For example, the Layer panel does not show the result of modifying the Scale property of a layer. To see a layer in context with other layers and with the results of transforms, use the Composition panel.
Layers that are not based on a source footage item are synthetic layers. Synthetic layers include text layers and shape layers. You cannot open a synthetic layer in the Layer panel. You can, however, precompose a synthetic layer and open the precomposition in the Layer panel.
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2012年10月30日星期二

after effects Pre-Comps and Master Compositions

after effects Pre-Comps and Master Compositions
Combining two Adobe After Effects compositions into a single composition is helpful when you want to re-use a composition multiple times. Additionally, it is useful for applying complex changes to a group of compositions at once. Nesting is the process through which you combine compositions into a single composition, known as a nested composition or a precomposition. The entire set of compositions that are related to each other through nesting are known as the composition network.
Since switching to Premiere Pro, my editing workflow has been to lock picture in Premiere and then finish in After Effects. To date I've been using a workflow similar to the one I'd use when editing in Final Cut Pro, which was to import a final sequence into After Effects (either as an XML or by using Premiere Pro as an intermediary), and apply color correction, titling, and other effects in AE. While this approach gives a very high quality output, a problem rears its head if you want to make changes to the edit after "locking" picture. So what's the best workflow between Premiere and After Effects?
Once I change the coloring and add the final titles and effects, I find my picture lock often becomes unlocked. But now if I make changes to my edit in Premiere, they aren't reflected in AE, and so I find myself making edits in AE, which is far from ideal given the program's lack of real-time editing features (and editing tools like trim, slide, etc). And then if I need to revisit the edit in Premiere, I in fact have a newer edit in AE than I do in PPro. It's a version control nightmare. However, it's hard to beat from a price:quality perspective — this is the reason this workflow is spotlighted in Stu Maschwitz's DV Rebel's Guide. In theory, Adobe has designed Dynamic Link to solve this problem. But does it?
As far as I can tell, not really. Dynamic Link gives you two options, both of which are nice to have, but neither of which accomplishes what I'm looking for. The two options are: one, you can create an After Effects composition within Premiere Pro, and have that comp dynamically update in your Premiere sequence when you make changes in AE. The second option is to use Dynamic Link to open a Premiere project in After Effects, at which point you can import sequences and have them show up in AE — as a single object. There's no way to drill down to the individual clips to make changes unless you import a Premiere sequence, at which point I'm back in the same boat I was in before when using Final Cut (though it's worth noting that Premiere's integration is far more advanced, as most effects and transitions carry over flawlessly). While I'm happy to have the ability to open a Premiere Pro sequence in After Effects, one can't but wonder if the two programs could be combined in order to prevent this non-ideal workflow. As it is, once you go AE, it's hard to go back. At least, this is my understanding — am I missing something? Is all of this just confusing? Please share your experiences in the comments.
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2012年10月26日星期五

after effects isolated slow motion effect

after effects isolated slow motion effect

after effects isolated slow motion effect 
As a recent convert to Adobe Premiere one of my favorite discoveries is the Rate Stretch tool. It allows you to visually pull the length of a clip to fill how ever much time you need, then immediately preview the results. As someone who uses a lot of b-roll and slow motion in his filmmaking this tool is a serious time-saver. (check out the video after the jump)
The only problem with the Rate Stretch tool is the quality of the motion quality. In order for Premiere to slow the clip down it has to create new frames, and the more you slow it down the more frames Premiere has to create out of thin air. Premiere does a decent job of this, but most of the times I need a lot better than "decent" - I need "amazing".
In order to get great results you need something like Pixel Motion (within After Effects) to really get top-quality slow motion. In the past that meant slowing the clips down in Final Cut, exporting them into AE, applying the effect, exporting them back into FCP and hoping I guessed right on the slow down rate. 
(if not, I get to repeat the whole process again)
Enter Dynamic Linking...
Using Dynamic Linking allows you to spend 98% of your time working in the editor, actually crafting stories. (you'll need the Production Premium suite to rock this) Here's the workflow -
1. Edit your entire sequence in Premiere; use the Rate Stretch tool to get the slow motion clips where you want them. (don't worry about the playback quality at this point)
2. Right-click the clip you've slowed down and select "Replace with After Effects Composition". After Effects will automatically open with a new project based on the clip.
3. In After Effects timeline click the "Enables Frame Blending on all layers with the Frame Blend switch set" button to enable frame blending (pictured below).
4. Next, click the Frame Blend radio button twice so the line becomes solid. This tells AE to use Pixel Motion high-quality frame blending.
5. Hit "Save" in After Effects.
6. You're done! Head back over to Premiere and your changes will be reflected in the clip on the sequence timeline.
Depending on the power of the machine you're editing on you should be able to immediately preview the improved frame blending. The great news is that you don't need to render, at all, until you're ready to do your final render in Premiere. It's that simple.
This technique can be used for a number of different operations like color grading and noise reduction. I personally prefer to do most of these processes in the editor itself; high-quality time stretching just isn't possible at this point without After Effects. Check out this video to see the difference in quality -
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2012年10月24日星期三

How 'merge' or 'join' layers in after effects

How 'merge' or 'join' layers in after effects

How  'merge' or 'join' layers in after effects
Each composition has its own settings for resolution, duration, etc. These are independent of the main project and other compositions. You define these settings when you create a new composition, and you can also change them at any time by selecting Composition > Composition Settings from the main menu (shortcut Crtl/Cmd+K).
For most compositions one of the presets will be suitable but you can customize settings as you like.
Note: See composition duration for a couple of tips on setting the duration.
The Advanced tab includes a few advanced options as pictured below. In most cases you can ignore these.
It is usually best to make the composition settings the same as the footage, e.g. Don't change the frame rate unless you really need to. Fortunately, After Effects provides an easy way to create new compositions from footage using the correct settings. Simply drag the footage from the project panel to the Create New Composition icon as pictured below. Bingo — a new composition with exactly the same settings as the footage.
Note: If you click the Create New Composition icon instead of dragging a file onto it, a new empty composition is created.
The next step of the workflow is to create a composition, in which you will create all animation, layering, and effects. An After Effects composition has both spatial dimensions and a temporal dimension, called a duration, or length in time.
Compositions include one or more layers, arranged in the Composition panel and in the Timeline panel. Any item that you add to a composition—such as a still image, moving-image file, audio file, light layers, camera layers, or even another composition—becomes a new layer. Simple projects may include only one composition, whereas elaborate projects may include several compositions to organize large amounts of footage or intricate effects sequences.
To create a composition, you'll drag the footage items into the Timeline panel, and After Effects will create layers for them. Follow these steps:
In the Project panel, Ctrl-click (Windows) or Command-click (Mac OS) to select the bgwtext composition as well as the DJ, gc_adobe_dj, kaleidoscope_waveforms, and pulsating_radial_waves footage items.
Drag the selected footage items into the Timeline panel. The New Composition from Selection dialog box appears
After Effects bases the size of the new composition on the selected footage. In this example, all of the footage is sized identically, so you can accept the default settings.
Click OK to create the new composition. The footage items appear as layers in the Timeline panel, and After Effects displays the composition, named bgwtext 2, in the Composition panel.
Click in the Timeline panel to make it active, and then press F2 to deselect all layers.
When you add a footage item to a composition, the footage becomes the source for a new layer. A composition can have any number of layers, and you also can include a composition as a layer in another composition, which is called nesting.
About Layers
Layers are the components you use to build a composition. Any item that you add to a composition—such as a still image, moving-image file, audio file, light layers, camera layers, or even another composition—becomes a new layer. Without layers, a composition consists of only an empty frame.
Using layers, you can work with specific footage items in a composition without affecting any other footage. For example, you can move, rotate, and draw masks for one layer without disturbing any other layers in the composition, or you can use the same footage in more than one layer and use it differently in each instance. In general, the layer order in the Timeline panel corresponds to the stacking order in the Composition panel.
This composition contains five footage items and therefore five layers in the Timeline panel. Depending on the order in which the elements were selected when you imported them, your layer stack may differ from the one shown in this example. The layers need to be in a specific order as you add effects and animations, however, so you'll rearrange them now.
Drag bgwtext to the bottom of the layer stack (if it isn't already there). Drag the other four layers 
NOTE
You may need to click a blank area of the Timeline panel or press F2 to deselect layers before you can select an individual layer.
From this point forward in the workflow, you should be thinking about layers, not footage items. You'll change the column title accordingly.
Click the Source Name column title in the Timeline panel to change it to Layer Name, as shown in Figure 6.
Choose File > Save to save your project so far.
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tutorial after effects Slow-mo with 60fps footage properly

tutorial after effects Slow-mo with 60fps footage properly

tutorial after effects Slow-mo with 60fps footage properly
To get the "super slow motion", after I filmed at 60fps, I through it into the program "After Effects". I used an effect that comes with the program called "Time Warp". This allowed me to make the 60fps, to 1000fps. The way this works is the computer processes/adds frames in between the frames that are already in existence. It took several days for the computer to process the clips into the super slow motion that appears as well, so it does take a lot out of the computer, as far as processing goes. Another similar program that does something similar to this slow motion effect, is a program called "Twixtor". It's another great program that is very similar, however you have to buy it as a separate plugin, and it is a little expensive, but if you do a lot of slow motion, it's totally worth it :)
The concept and the acting was cheesy and silly, but creating this video was 100% pure fun.
I decided to shoot the whole sequence in a 720P 60 fps mode, with the intent of slowing some parts down for true slow motion in the 24 fps edit line. I was a little concerned about the lack of sharpness compared to 1080p, but GH2 holds up very well — much better than T2i.
I inserted "Bill + Kathy" (dropzone and the airplane owners) at 00:13 in After Effects, for a little gag the locals might appreciate. Motion tracking with Mocha worked well, as usual. Photoshopped decal slipped a little during tracking, but you really had to look frame by frame.
I forgot about the 180 shuttle rule at 00:46, shooting it in 1/50 by accident instead of 1/125, resulting in undesirable motion artifact for some indoor shots. Freefall footage, however, shot in 1/200 shuttle speed, looked pretty good in slow motion, with the footage conformed from 60 to 24 fps.
For color grading, Magic Bullet Mojo was used for ground footage. It turned out a little dark, so lightened it a little using Colorista. For skydiving footage, Colorista was used, bringing up the shadows and giving a slight greenish tint. I added a little yellow to the midrange and a bit of red to lightend hilights.
As I use the GH2 more, I really could use for shallow DOF. I need to get a faster lens. For technical aspect of achieving slow motion
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