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What kind of key (alpha channel) should I set our vision mixer / production switcher to accept; pre-multiplied or straight?

April 26, 2017Alpha channel key mixer pre-multiplied production switcher vision

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What kind of key (alpha channel) should I set our vision mixer / production switcher to accept; pre-multiplied or straight?

1 Answer

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10 Posted

Currently the “Flash Producer” only supports pre-multiplied alphas, since the Flash Player cannot generate straight alphas. To be able to mix Flash and video content, we recommend sticking with pre-multiplied alphas on videos as well. There is a guide to configuring vision mixers in the wiki.