But I agree, this would be cool to have as a spin-off project connected to LWJGL (like lwjgl-extended or something).
Yes. LWJGL needs more extensions. LWJGL-Vid or LWJVL (Light Weight Java Video Library) or something. Just have an additional Jar that gives you built-in methods for playing all supported audio.
I haven't messed with Xuggler in about a year, but from what I recall, it was pretty straightforward compared to using libav in C, which I had previously been doing a fair amount of at the time.
That's good to know.
I guess I just want to get in touch with their team and see how easy it is to make it portable, like LWJGL. We'll see from there.