GoPro Original, Hero 2, Hero 3, 3+ & 4
Leaked specs come to us courtesy of Ambarella, the company manufacturing the Hero 4's chip.
4K Ultra HD H.264 Encoder
Record in 4k resolution at 30fps
High Profile with B-frames for high efficiency
Ultra High Frame Rate Modes
Record in 1080p at 120fps or 720p at 240fps