Canon EOS-1D C EOS 1D X Instruction Manual - Page 248

Movie Shooting Cautions Recording and Image Quality If you use a card with a slow writing speed, a five-level indicator may appear on the right of the screen during movie shooting. It indicates how much data has not yet been written to the card (remaining capacity of the internal buffer memory). The slower the card, the faster the indicator will climb upward. If the indicator becomes full, movie shooting will stop automatically. If the card has a fast writing speed, the indicator will either Indicator not appear or the level (if displayed) will hardly go upward. First, shoot a few test movies to see if the card can write fast enough. Still Photo Shooting During Movie Shooting Regarding the image quality of still photos, see "Image Quality" on page 221. Playback and TV Connection In autoexposure shooting, shutter-priority AE, or aperture-priority AE modes, if the brightness changes during movie shooting, the movie may freeze temporarily. In such cases, shoot movies with manual exposure. If you connect the camera to a TV set (p.273, 276) and shoot a movie, the TV will not output any sound during the shooting. However, the sound will be properly recorded. 248