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Rendering Video with transparent Background

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Kurt EhlmannRendering Video with transparent Background
by on Aug 30, 2011 at 3:35:15 pm

Is it possible to Render an after effects video with a transparent background. An example being if I wanted to drop a lower third as a title over the a video on a differnt editing system than adobe. If so, how?


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Josh PappasRe: Rendering Video with transparent Background
by on Aug 30, 2011 at 4:36:26 pm

Yes it is! For starters, make sure your comp actually has a transparent background, not simply a black background, by toggling "Toggle Transparency Grid" button at the bottom of the comp viewer (it's the small, checkered button). If the background changes to the checkered pattern, you're good to go.

The only other thing to deal with is the proper output settings. Not all codecs support an alpha channel. I typically use these settings in the Output Module:

Format: Quicktime

Format Options
-Video Codec: Animation
-Quality: 85 to 100, depending on how critical quality is. 100 is uncompressed.

Channels: RGB + Alpha
Depth: Millions of Colors+ (the "+" indicates the alpha channel)
Color: Straight (Unmatted) - This avoids a luminance shift in semi-transparent areas that you get with "Premultiplied (Matted)"

Others use TIFF or PNG image sequences instead of Quicktime Animation, but the underlying concept is the same.

Hope this helps!
Josh


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Kurt EhlmannRe: Rendering Video with transparent Background
by on Aug 30, 2011 at 6:22:09 pm

Fantastic! Thankyou


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Josh PappasRe: Rendering Video with transparent Background
by on Aug 30, 2011 at 7:39:06 pm

You're quite welcome! You might also be interested in downloading the free Knoll Unmult effect, which is perfect for creating transparency on items where you would normally use "screen" or "lighten" blending modes to see the underlying layers (such as a lens flare applied to a black solid). It creates an alpha channel based on the luminance of the layer, which is very handy.

Enjoy!


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Falafel RaptorRe: Rendering Video with transparent Background
by on Aug 21, 2012 at 7:35:29 am

thanks for this!life is now easier.


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Anthony McleodRe: Rendering Video with transparent Background
by on Jan 3, 2013 at 2:56:13 pm

This has helped me so much. Thank you!


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Muhammad Hafiizh AliasRe: Rendering Video with transparent Background
by on Oct 14, 2014 at 4:50:50 am

thanks so much dude!!


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Aj RidingRe: Rendering Video with transparent Background
by on Apr 12, 2015 at 6:39:09 am

Thanks, that a huge help!


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