i think that it's the latter. How do I do that?
I know nothing about the specifics of this problem, but a free program called
GrafX2 can swap palette entries if that's the problem.
Download it, and open each frame image and use the xSwap function.
GrafX2 isn't necessarily the most intuitive, so here's some steps:
1. Click the L. Find your image with the image editor and open it.
2. Click pal.
3. Click, palette entry 0. An arrow will appear to the left of it.
4. Mess around slightly with the values to confirm it's the color that's being made transparent instead. (If not the problem is probably something else)
5. If so, Click X-Swap and click any other unused color in the palette.
6. Click layers, check background, color 0, and resave your image.
But none of that will probably help if flash doesn't like indexed png images. If that's the case
irfanview MAY help.
Open one of the images in question:
1. Image->Increase color depth. (If it's grayed out, this step is done. If it's not, you want 24bpp)
2. Save the image as png.
3. Check "Save transparent color" and try with and without "save transparency as Alpha Channel". (You probably want it with.) After you enter the filename, irfanview will let you click the color you want to be transparent.
4. Hope it works.
If it does, irfanview has some great batch processing which will allows you to do all these actions in one go. (Well, you'll still need to click the right transparent color for each image saved)
If neither of those things help, I don't know what to tell you since I don't own flash and can't really mess with it on my own.
But here's the link I think ptoing was referencing in case you haven't seen it:
http://helpx.adobe.com/flash/kb/transparency-support-flash-professional.htmlEdit: And it may be possible to do all this directly in graphics gale. It can create 24bpp images and has an option to make an alpha channel. But I'm not as familiar with it, so no steps from me on that. Also, I get the impression from your first post you already tried that.