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2009年11月2日 星期一

Working with alpha-channel transparencies

1. Drag logo.psd to Video 2, overlaying the blend title.
The blend title can't be overlayed. We might as well delete it.
2. Adjust the position parameters to 600 and 340, as shown here. (figure)
3. Choose Video Effects > Keying > Alpha Adjust to apply Alpha Adjust to Logo.psd.
As with the Transform effect's connection to Motion, you can use Alpha Adjust to apply Opacity at some other point in the effect chain, instead of second-to-last, where it would occru if you were to use the Opacity fixed effect. ???
4. Select Ignore Alpha to see the alpha channel as opaque rather than transparent.
5. Delete Alpha Adjust in the Effect Controls panel.

http://tw.knowledge.yahoo.com/question/question?qid=1007091201608
http://tw.knowledge.yahoo.com/question/question?qid=1105061700124
http://tw.knowledge.yahoo.com/question/question?qid=1206102307055

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