Why are my sprites sheets not sizing/aligning properly?

Question

I'm trying to export my Flash animations as sprite sheets to import into the Unreal Engine.  But I keep running into issues where the reported sprite size/locations reported by Flash aren't quite right.
My example generated sprite sheet, it was generated with no border/shape padding:
The first bit of the sun.json file it generates, it says every frame is 214 x 214.
{"frames": {
"Sun Spin0000":
    "frame": {"x":0,"y":0,"w":214,"h":214},
    "rotated": false,
    "trimmed": false,
    "spriteSourceSize": {"x":0,"y":0,"w":214,"h":214},
    "sourceSize": {"w":214,"h":214}
If I load the sprite sheet into cs6 and shrink the canvas size down to 214 x 214, you'll see the first frame is already starting to show tiny slivers from adjacent frames.
I'm not using padding around the borders or between frames. You can see the there is enough padding already IMO.  The problem to me seems to be that Flash
isn't properly outputting the the values into the JSON file, which then I'm using to import into the Unreal engine. If I can't trust these values to be correct,
even if I were to add in padding to alleviate this, I will still have to manually adjust the frame size/locations of every frame of every sprite sheet by hand.

Answer 1

what's the size of your untransformed suns?  are they 214x214?
if so how are you loading your spritesheet and displaying the sprites?