Canon EOS 5D Mark IV L-series Zoom Lens Kit Owner's Manual

Page of 865
3
 Setting the Movie Recording Quality
354
 
For 4K movie shooting, [z3: High ISO speed NR] will not take effect. 
Therefore, noise may be more noticeable depending on the shooting 
conditions.
 
If you change the [53: Video system] setting, also set the movie-
recording size again.
 
Movies shot in 4K, L8/7, or at a high frame rate may not be 
played back properly on other devices due to the heavy data processing 
load during playback.
 
The frame rate displayed on the movie recording size screen switches 
depending on whether [53: Video system] is set to [For NTSC] or [For 
PAL
].
 
You cannot shoot Standard Definition (VGA) movies.
 
If you change the movie size from Full HD or HD to 4K, the image area of 
the movie shooting will be shifted to the telephoto end.
 
The 4K movie coverage is different from that of the EOS-1D C and EOS-
1D X Mark II.
 
The color sampling recorded will be as follows: 4K: YCbCr 4:2:2 (8-bit), 
Full HD/HD: YCbCr 4:2:0 (8-bit). The color matrix will be as follows: 4K: 
Rec. ITU-R BT.601, and Full HD/HD: Rec. ITU-R BT.709.