Thanks Daniel,
Im not very knowledgeable on compression techniques but if I understand you I have to keep to 4:4:4 to stop the banding that I experiencing. Now how do I do that? I dont seem to have any options for changing settings on H264 other than compressor Quality, Data rates Frames and Encode quality. No mention of 4:4:4 etc. Does this mean I have to buy a Quicktime codec set to 4:4:4?
Thanks again for you advice