I am using ibx264. I think this is the default codec in Shotcut, and also is recommended by You Tube. All of my individual images look fine. The banding shows up when I use Shotcut to compile and video clip and export it. The codec parameters are quality 60%, GOP 125, B frames 3, codec threads 0, rate control quality based VBR, format MP4. I don’t see where to increase bitrate in Shotcut. Thanks.