If you use a standard frame rate (30 frames per second), aim at the low range point, from 3500 to 5000 Kbit/sec. If your frame rate is high (60 frames per second), aim at beat rate from 4500 to 6000 kbit/sec. A perfect bitrate for video broadcastings in 1080p would be from 3500 to 4000 kbit/sec.