Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 386)

Caution
Precautions when set to [High Frame Rate: Enable]
Time codes are not recorded when [ Count up ] is set to [ Free run ] in [ : Time
code ] ( ).
Check the [ : Movie rec. size ] setting if you return this setting to [ Disable ].
The screen may flicker if you record High Frame Rate movies under fluorescent or
LED lighting.
For a moment when you start or stop recording High Frame Rate movies, the
movie is not updated, and the frame stops momentarily. Be aware of this when
recording movies to external devices via HDMI.
Movie frame rates shown on the screen as you record High Frame Rate movies do
not correspond to the frame rate of the movie recorded.
Headphones cannot be used (no sound is audible).
The frame rate of HDMI video output is 59.94 fps or 50.00 fps.
The camera's internal temperature may rise and less recording time may be
available after extended movie playback or image display.
With the camera set to 179.8/150.0 fps, Movie digital IS may not provide sufficient
stabilization when a macro lens is used to shoot subjects near the closest focusing
distance.
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