I lika it: (from mirrorlessrumors.com)
Recording file format
MP4: H.264/MPEG-4 AVC (Audio format: LPCM (2ch 48kHz/16-bit), AAC (2ch)), MP4 HEVC:
H.265/HEVC (Audio format: AAC (2ch))
AVCHD Progressive (Audio format: Dolby Audio (2ch)), AVCHD (Audio format: Dolby Audio (2ch))
MP4
[4K] 3840×2160:
59.94p, 150Mbps (4:2:0 8-bit LongGOP) (LPCM)
29.97p, 100Mbps (4:2:0 8-bit LongGOP) (AAC)
23.98p, 100Mbps (4:2:0 8-bit LongGOP) (AAC)
[FHD] 1920×1080: 59.94p, 28Mbps (4:2:0 8-bit LongGOP) (AAC)
29.97p, 20Mbps (4:2:0 8-bit LongGOP) (AAC)
MP4 HEVC
[4K] 3840×2160:
29.97p, 72Mbps (4:2:0 10-bit LongGOP) (AAC) (HEVC, HLG recording)
23.98p, 72Mbps (4:2:0 10-bit LongGOP) (AAC) (HEVC, HLG recording)
AVCHD Progressive
[FHD] 1920×1080:
59.94p, 28Mbps (4:2:0 8-bit LongGOP) (Dolby Audio)
59.94i, 24Mbps (4:2:0 8-bit LongGOP) (Dolby Audio) (Sensor output is 29.97fps)
59.94i, 17Mbps (4:2:0 8-bit LongGOP) (Dolby Audio) (Sensor output is 59.94fps)
23.98p, 24Mbps (4:2:0 8-bit LongGOP) (Dolby Audio)
MP4 (High speed video)
[4K] 3840×2160:
29.97p (Sensor output is 60fps)
23.98p (Sensor output is 48fps)
[FHD] 1920×1080:
29.97p (Sensor output is 180fps / 150fps)