HDTV Encoding on G80?

Has any projects popped up yet that would let someone encode a raw hdtv signal into a codec of choice using a G80?

My key interest in this is I want to build a MythTV box that can take a raw unencrypted signal from my cable box’s component output and encode it to mpeg2 using a GPU. And does anyone think using a GPU to do this would be near real time encoding or would there still be a fair bit of lag?

HDTV encoding would certainly be possible using G80 and CUDA, although parts of the process such as the entropy coding are quite difficult on the GPU. The performance would be very dependent on your quality and resolution requirements. I’m not aware of anyone that has announced a product that does this yet.