Canon EOS 5Ds Instruction Manual page 484

Troubleshooting Guide
Playback Problems
Part of the image blinks in black.
[33: Highlight alert] is set to [Enable] (p.325).
A red box is displayed on the image.
[33: AF point disp.] is set to [Enable] (p.325).
The image cannot be erased.
If the image is protected, it cannot be erased (p.334).
The movie cannot be played back.
Movies edited with a computer cannot be played back with the camera.
Camera operation noise can be heard
when the movie is played back.
If you operate the camera's dials or lens during movie shooting, the
operation noise will also be recorded. Using an external microphone
(commercially available) is recommended (p.301).
The movie has still moments.
During autoexposure movie shooting, if there is a drastic change in the
exposure level, the recording will stop momentarily until the brightness
stabilizes. In such cases, shoot in the <a> mode (p.286).
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