Got this one while trying to do a still image.

Hi Dcrinnert,

That’s a Quicktime utility routine error, specifically “Cannot begin movie compression.”. It’s an OS error. I would try using another file format then .pct.

Best,
Ian

Ian - 11 June 2008 05:39 AM

That’s a Quicktime utility routine error, specifically “Cannot begin movie compression.”. It’s an OS error. I would try using another file format then .pct.

Hi Ian,

I just tried IMG format.  It rendered, but now my glows are solid instead of, well, glow-y.  They look fine when I render to a QT movie.  Don’t know how they look in PCT, since that never rendered. 

Thanks,
Dan

Hi Dan,

Sounds like you’ve viewing the glows with the alpha channel un-applied… Show us a screenshot

Best,
Ian

Ian - 11 June 2008 01:16 PM

Sounds like you’ve viewing the glows with the alpha channel un-applied… Show us a screenshot

Hi Ian,

A-ha!  When I open it in Photoshop CS3, I need to check the box the says “Premultiply Image.”

Thanks!

Dan

Ian,
can you explain the whole pre-multiply thing.  It would be helpful to get it in plain english.
thanks,
Yon

Might be helpful:

http://livedocs.adobe.com/en_US/AfterEffects/8.0/help.html?content=WS3878526689cb91655866c1103906c6dea-7f7e.html

http://cowcast.creativecow.net/podcast/what-is-a-straight-render--119

Navstar,
There you go.
thanks,
Yon

“Premultiplied channels store transparency information in the alpha channel and also in the visible RGB channels, which are multiplied with a background color. The colors of semitransparent areas, such as feathered mask edges, are shifted toward the background color in proportion to their degree of transparency.” -Adobe