from “Render and export a composition as an FLV or F4V file”:
“You render and export a movie to the FLV or F4V container format using the render queue, just as you do with other formats….
Important: Some applications install a QuickTime export component that appears as an entry in the File > Export menu for Flash Video (FLV). Adobe recommends that you not use this command, but instead render and export FLV and F4V files using the Render Queue panel. Some features, such as export of cue points from After Effects, only work for render and export through the Render Queue panel.”
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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