Video after remux to mp4 pixelated..please help me


New Member
at first sorry for my bad english. If I remux my MKV video to mp4 the video gets pixelated. Not the hole screen but some points. Above all if the picture is moving.
It only happen when I use the Quicksync H.264 Encoder. If I use the x264 the remux work fine and the picture is good. But I want to take the better Resolution I can build with quicksync. I try to record as flv or mkv dosent matter. The point where it works is the encoder settings :(
Do you guys have any Ideas? :(
Thanks for your help! :)
Best wishes