Thanks to the recent FFmpeg notes on creating GIFs.
I was unaware GIFs could handle transparency at all until then.

Couple of additional questions:

1 - Am I understanding this correctly:
A single pixel of a GIF can either be 100% opaque or 100% transparent, no 
partial transparencies like you can achieve in PNG files, correct?

2 - My experience with GIFs is there is little (or no?) ability to control the 
quality vs file size tradeoffs.
i.e. If you want a high res GIF, you necessarily will have a large file size
(In contrast to, say, JPGs or MP4s where you can achieve high quality picture 
at surprisingly small file sizes)
Is this just the limitation of the GIF format, or is there some compression or 
other wizardry that can be done with, say FFmpeg, to get higher quality GIFs 
without ballooning the file size?)

Thanks
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