[Theora] yuv2rgb

[lluis]

hi all,

i'm trying to code a tool to get some images from a ogg/theora file ....

so basically i need to get a frame and convert to rgb ... and here is my 
question (sorry, i'm newbe here) ... 

how to convert a yuv_buffer to a rgb matrix ?

i tryied diferent ways but my mistakes are bassically cause i don't understant 
how yuv_buffer structure works ... 

anybody can help? thanks a lot.

ll-.