The Canon 5D Mark IV record 4K video with MJEG format, which separately compresses JPEGs in a sequence, which leads to high quality outcome in terms of resolution. The MJPEG is usually very large in size and will consumer a lot of bandwidth and stora...
Have you installed EOS ultility 3.2.21? Can be found here:http://www.usa.canon.com/cusa/consumer/products/cameras/slr_cameras/eos_rebel_t6i_ef_s_18_55mm_is_stm_lens_kit#DriversAndSoftware
