I am doing something similar, just for the sake of it, on the PlayStation 1 of all things: a custom video codec that takes advantage of the console's hardware M

I am doing something similar, just for the sake of it, on the PlayStation 1 of all things: a custom video codec that takes advantage of the console's hardware MJPEG decoder, but replaces the software side of the stock codec (normally in charge of decompressing the Huffman encoded bitstream into run-length tuples, which are then fed into the decoder) with a slightly more efficient compression scheme. I'm also trying to leverage the GPU to post-process decoded blocks by e.g. blending them with the previous frame, on hardware that was never meant to support p-frames in the first place. The whole project is still in its early stages though, so there is nothing I can show off (yet).