> Video formats supported: H.264 video up to 4K, 30 frames per second, High Profile level 4.2 with AAC ‑ LC audio up to 160 Kbps, 48kHz, stereo audio or Dolby Audio up to 1008 Kbps, 48kHz, stereo or multichannel audio, in .m4v, .mp4, and .mov file formats; MPEG ‑ 4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC ‑ LC audio up to 160 Kbps per channel, 48kHz, stereo audio or Dolby Audio up to 1008 Kbps, 48kHz, stereo or multichannel audio, in .m4v, .mp4, and .mov file formats; Motion JPEG (M ‑ JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format
https://www.apple.com/ipad-pro/specs/