User`s guide

Chapter 11 Finishing: Rendering and Exporting
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• Premultiplied Black: Alpha channels are premultiplied with solid black. Some
hardware devices may not composite the color channels correctly. This choice
corrects that problem. The level of black used depends on whether the Generate Color
Safe Output option is selected.
• Premultiplied White: Alpha channels are premultiplied with solid white. Some
hardware devices may not composite the color channels correctly. This choice
corrects that problem. The level of white used depends on whether the Generate Color
Safe Output option is selected
• Composite over Black: Removes the alpha channel and composites the image over
solid black. The level of black used depends on whether the Generate Color Safe
Output option is selected.
• Composite over White: Removes the alpha channel and composites the image over
solid white. The level of white used depends on whether the Generate Color Safe
Output option is selected.
12. Select the Use In/Out Range option to render only the frames located between the In and
Out points in the timeline.
13. Set the Compression options—see “Setting the Video Compression” on page 579
Setting the Better Quality Field Rendering Option
Selecting this option ensures that computer-generated graphics or animated text are smooth
in the rendered. It only affects the output when you are field rendering and if the effect
involves compositing images using hard alpha edges such as keying text or video over video.
This option takes more time to render, but generally corrects any problems with jitter or
rough edges on effects
Select this option when:
• Rendering text rolls, crawls, or any animation that uses computer-generated text or
graphics.
• You have effects that include edging, an alpha channel, or DVEs, turn on this option to
ensure the highest quality edges.
• Processing images for web or graphics applications.
Do not select this option when:
• Using effects such as color or blur filters that do not include hard alpha edges.
• You want to optimize rendering for speed. When using effects such as color, it will
render the effect almost twice as fast, sometimes with little or no apparent image quality
difference.