Try JPGToVideo. It's free and with one button joins together a sequence of JPG's into an AVI. Great for timelapses. It doesn't add an audio track, but your video editor will do that. Though if it must be video, consider chromakeying. Make the background of the poser animation bright green. To avoid extreme fringing on the animation, turn off anti-aliasing and render at "full frame uncompressed". You'll still get some fringing, especially on hair it's unavoidable, but some video editors have a tolerance or feathering option that will reduce that. Same applies when using videos created from stills.

Pinky - you left the lens cap of your mind on again.