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Få bedre alpha video i Flash - omFlash();
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Få bedre alpha video i Flash


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Det har siden Flash Player 8 været muligt at vise video med alphakanaler, sådan så man eksempelvis kan lave greenscreen optagelser og efterfølgende skifte baggrunden ud med noget andet, direkte i Flash.

Noget der dog i den forbindelse ofte kan drille lidt, er at der kommer en halo (farvet ring) rundt om det der er fritlagt, og tit og ofte kan man være tilbøjelig til at tro, at det er fordi det ikke er blevet fritlagt ordentligt, men der kan være en anden grund!

Jeg er ikke super teknisk når det kommer til farvestyring, men når man eksporterer video med alpha fra After Effects, så er der forskellige måder at medtage alphakanalen og for at få de optimale resultater når videoen senere konverteres til flv, så er det vigtigt at alphakanalen eksporteres i “straight alpha mode”.
Er midt i et projekt hvor den ene setting har gjort forskellen på om materialet var ubrugeligt eller godt.

Der er en længere beskrivelse af hvordan det hænger sammen her:
Flash, FLV, and alpha channels: straight or premultiplied?



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