Canon EOS 5D Mark III Instruction Manual page 375

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. If this happens, shoot with <a> shooting mode (p.225).
No image appears on the TV screen.
Use the stereo AV cable that came with the camera (p.277).
Make sure the stereo AV cable or HDMI cable's plug is inserted all the
way in (p.274, 277).
Set the video OUT system (NTSC/PAL) to the same video system as
the TV set (p.277).
Even if you play back an image when [z5: HDMI output + LCD] is
set to [Mirroring], the image will not appear on the TV specified as
HDMI output.
There are multiple movie files for a single movie shoot.
If the movie file size reaches 4 GB, another movie file will be created
automatically (p.234).
My card reader does not recognize the card.
If you format a card of 128 GB or higher with this camera, it will be
formatted in exFAT. This means that some card readers and computer
operating systems might not recognize the card properly. In such a
case, connect your camera to the computer with the provided interface
cable, then transfer the images to your computer using EOS Utility
(provided software, p.394).
I cannot process the RAW image.
41 and 61 images cannot be processed with the camera. Use
the provided software Digital Photo Professional to process the image
(p.394).
Troubleshooting Guide
375