Black lines not in Preview showing up after Export

[Daniel38332726pfwn]

I'm creating a simple graphical animation that involves shape tweens to show circles forming with other circles.

In the preview, everything looks great. The three yellow circles move towards the blue circle in the center and change into their color, as seen below. They're using Shape Tweens with "Quad Ease-In-Out" as the effect.

However, after I export the .fla file to a .mp4 using Adobe Media Encoder, it looks like this:

For some reason, three black lines appear connecting the origin of the circles to their final destination. 

I did tons of searches, but I was unable to find someone who had a similar issue. Anybody know what is going on?

[Mario_CR · Accepted solution]

Hi, try converting the Shape Tween to keyframes. Select the tween span > right-click > Convert to Frame-by-Frame Animation > Keyframe Each Frame.

[Daniel38332726pfwn]

Thanks, this did the trick!

[kglad]

the circles and borders are a symbol?

[Daniel38332726pfwn]

Looks like they're classified as "Shape" in the Properties Tab.

[kglad]

one solution is enough..

[Daniel38332726pfwn]

Yes I know, just believed that it would be good to answer your question in case future searchers find your question relevant.

[kglad]

ok, using a classic tween with symbols will preserve all parts (fill and stroke) of the symbol.