Working with Video

Corel Painter offers certain ways of working with video that are not offered by QuickTime or Audio Video Interleaved (AVI) applications. You can use any of the Corel Painter brushes, textures, and effects to modify a QuickTime or AVI movie. You can paint directly into video frames, you can clone video using the Natural-Media tools, and you can combine or composite portions of one video clip with another.

When you open a QuickTime or AVI movie, Corel Painter automatically converts it to a frame stack. A frame stack is a series of images, each equal in size and resolution.

Corel Painter does not provide features for working with audio.

When you're finished with the movie in Corel Painter, you can save it as a QuickTime, AVI, or animated GIF file. You can then open the QuickTime or AVI movie in a video-editing application, like Adobe® Premiere®, in which you can add sound effects and other finishing touches.

Considering Color

You might want to create a color set for the animation. Creating a color set helps you better control the use of color. For example, you wouldn't want the colors of your characters shifting between frames. Using a particular color set prevents this from happening. You might want to set up an image of each character with annotations to specify which colors to use in which areas.

Not all colors are suitable for video. For information about converting colors for use in video, refer to "Posterize by Using a Color Set" in the Help. For more information about using color, refer to "Getting Started with Color" on page 77.

Considering Frame Rate

Frame rate describes the number of image frames displayed per second (fps). The frame rate can determine not only how big a file your animation is, but also how smooth the motion appears.

When you save a movie as an AVI file, you can specify the rate of display. This doesn't necessarily mean that what you specify is what you'll experience. Factors like frame size, compression method, and computer speed can prevent some movies from achieving their set rate. If your animations will be viewed on the computer only, frame rates of 8, 10, and 12 fps are good choices. If your animations will be viewed elsewhere, you should consider the the following frame rates:

• The frame rate of NTSC video is 30 fps (29.97 fps in broadcast video). NTSC is the video standard used in the United States.

• The frame rate of Phase Alternating Line (PAL) video is 25 fps.

These frame rates are sufficient to produce smooth, continuous motion with filmed or video-recorded subjects.

Animation drawings contain far less detail than live-action images. The difference in the level of detail allows animations to be produced at frame rates significantly lower than those designed for live action. Because of the smoothness of color fills and continuity between images, animations can look quite nice at rates between 10 and 15 fps.

You must consider frame rates to know how many drawings are needed to make actions smooth, natural, and consistent throughout the project.

The computer can display frames at any reasonable rate. The Frame Stacks palette provides control over frame display rates within Corel Painter. You can preview an animation at a rate of 1 to 40 fps.

You can't display different sections of a movie at different rates. What you can do is create sections separately at different rates and then modulate them to the same rate before joining them. This is the kind of work you'll do in your video-editing application.

To set the preview frame rate

• On the Frame Stacks palette, adjust the Playback slider. The frame rate is displayed to the right of the slider.

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