Android : How can I show an encoded videio file in Mediaplayer in Android?

I have a video file that is encoded. For example the first bit of each byte is reversed. I want to read this video file, change the first bits and send the decoded result to Mediaplayer.

How can I do that? How can I create and pass this stream to media player?

It is important that I do not want to save a decoded copy of my video and play it on media player. I want to play encoded video directly on mediaplayer using streams.