Flash transparent JPEG through Flex

In Flash, via the authoring environment, you can put bitmaps in your movie that are compressed with JPEG but still support full a开发者_开发知识库lpha transparency, something JPEG does not support out-of-the-box. Is there a way to achieve the same when embedding bitmaps via the Flex [Embed] tag?

This is not something that is possible using Embed. A workaround I have used is to embed both the JPEG and a transparency mask and apply the mask programmatically. If possible, I recommend using transparent PNGs instead.