Those are the settings within all of the DLNA video conversion formats. So for MPEG2/DVD/NTSC, you are getting 480/576 (probably 480i).
If that works, you may want to see if you can get one of the MPEG2-TS high bandwidth settings to work (try auto fps, normal, and PAL) to get to 720p. If you can get one of those to work, then try it at very high bandwidth. It takes a bit of trial and error; it depends on what your TV accepts as well as how much bandwidth you have (not sure if you are wired or using WiFi).