flash: trace bitmaps (e.g., an imported movie) on each frame of the timeline.

trace_bitmap.jsfl

// http://www.dynamicflash.com/jsfl/

var doc = fl.getDocumentDOM()
var t = doc.getTimeline()

for(i=0; i < t.frameCount; i++) {
        t.currentFrame=i
        doc.selectAll()
        doc.traceBitmap(
                64,32,
//              i%8? i%4 ? 36 : 48 : 24,
//              i%8? i%4 ? 12 : 16 :  8,
                "smooth", "few corners")

//      threshold An integer that controls the number of colors in your traced bitmap.
//      Valid values are integers between 0 and 500.

//      minimumArea An integer that specifies the radius measured in pixels.
//      Valid values are integers between 1 and 1000.

//      curveFit A string that specifies how smoothly outlines are drawn.
//      Valid values are: "pixels", "very tight", "tight", "normal",
//      "smooth", and "very smooth".

//      cornerThreshold A string that is similar to curveFit,
//      but it pertains to the corners of the bitmap image.
//      Valid values are: "many corners", "normal", and "few corners".
}