I have imported QT animation codec files into Premiere and then re-exported them in variety of lossless formats and it seems like Premiere always introduces an ugly banding on gradients.
The original files are vector art with loads of gradients that are outputted from AE and look fine (they do exhibit some slight banding but nothing serious):
I export them from Premiere at maximum bit depth, without using the preview files and in a variety of codecs but they all introduce more banding (mostly evident in the dark grays which introduce a visibile fringing):
The thing is that the fringing is introduced when the source files are ingested. When I open them in the source monitor they already have this banding.
I'm on
PP CS6
Win7 x64