Did you configure the setup by yourself or are you using a blackmagic preset?
For 1440x1080i i'm assuming your using some sort of compressed format, either HDV or AVCHD. In either case you want to select the 1920x1080 50i (25i is not a good way to label it). You can choose whichever codec you want from uncompressed to mjpeg.
The red bar may appear overhead depending on the source codec, ideally you'd like them to match but in some cases this is not possible.