[keeperofdakeys]

Now I'm not sure how much floating point arithmetic the ogg vorbis encoder would use, but ARM can be sensitive to this. If you have the choice between "hardfp" and "softfp" for you distro, you want hardfp, as this will use the floating point hardware (which is present in the pi). Some ARM systems require softfp, since they lack fp hardware.

Also, what optimisations have you got turned on (on the compiler). For a realtime system, it might make sense to turn them down, trading stream size for processing time.