• Adobe After Effects

  How do I achieve basic transparency on exporting to FLV?

  Posted by Robert Anthony on June 30, 2008 at 3:13 pm

  I’m new to After Effects (but having fun learning!), experienced with Flash (AS3 development, etc).

  On a current projecct, I want to add some cool visual elements to my Flash movie. One idea I read about was to make small FLV’s with transparent background and then play then in the FLA.

  But I’m having trouble even making a small transparent FLV.

  I thought the following would be very simple:

  0) create a new composition, 20pixels x 20pixels, 02s15f in time.
  1) create a shape layer (an ellipse)
  2) Do Layer->Mask->New Mask, and then change the shape of the mask to “ellipse”, thus (I’d thought) exporting my ellipse shape against a transparent background (mask size/shape == ellipse size/shape).

  I wasn’t sure whether to use “Export FLV” or “Make Movie” with FLV setting. I tried both. On both I set the settings to include alpha channel. If I do “make movie” I get a long error (“AEGP Plugin Meida IO Plugin: There is a mismatch between Output Module settings and transcode settings Please verify your settings and try again. Property Data Invalid! Meida102 error: 0x400e0004. Frame dimensions out of bounds.”)

  If I export FLV the FLV is exported, but nothing shows up in MPEG Streamclip (playing FLV) — and Flash CRASHES when I try to import the FLV.

  I tried this on a colleague’s computer — same thing.

  Obviously I’m missing the most obvious of obvious. I’ve worked through an AE book and have some basic understanding of it (or thought I did!).

  How can I create small FLV elements for use, with alpha backgrounds (transparent backgrounds)?

  Best

  Robert

  Robert Anthony replied 18 years, 2 months ago 1 Member · 0 Replies
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