Geforce share (a.k.a. Shadowplay) Recording

[Bj Slice]

So I recently recorded 1440p video on shadowplay and I noticed that it is pixelated no matter how high I set the shadowplay/share video recording setup to. I have reinstalled geforce driver and I still record pixelated video even on 144p at the highest bitrate available. I hope I get help for this as I  already don't have skills in editing, having a nad auality video makes it worst. Thanks in advanced!