Nikon Z9 Mirrorless Camera - Manual (Page 309)

309 Recorders
• [ ProRes 422 HQ 10-bit (MOV) ] footage is output at a YCbCr value of
4:2:2 and a bit depth of 10 bits, regardless of the option selected for
[
Frame size/frame rate ].
• [ H.264 8-bit (MP4) ] footage is output at a YCbCr value of 4:2:2 and a
bit depth of 8 bits, regardless of the option selected for [ Frame size/
frame rate ].
D Recording to External Recorders That Support a Bit Depth of
10 Bits
The HDMI signal will be output at a bit depth of 10 bits only to HDMI
recorders that support this option.