Canon EOS 5Ds Instruction Manual page 299

Movie Files Exceeding 4 GB
Even if you shoot a movie exceeding 4 GB, you can keep shooting
without interruption.
During movie shooting, approx. 30 sec. before the movie reaches
the 4 GB file size, the elapsed shooting time or time code displayed
in the movie-shooting screen will start blinking. If you keep shooting
until the movie file size exceeds 4 GB, a new movie file will be
created automatically and the elapsed shooting time or time code
will stop blinking.
When you play back the movie, you will have to play each movie file
individually. Movie files cannot be played back automatically in
consecutive order. After the movie playback ends, select the next
movie and play it back.
Movie Shooting Time Limit
The maximum recording time of one movie clip is 29 min. 59 sec. If
the movie shooting time reaches 29 min. 59 sec., the movie shooting
will stop automatically. You can start shooting a movie again by
pressing the <0> button. (A new movie file starts being recorded.)
When shooting movies, if the file size exceeds 4 GB, "buSY" may be
displayed on the LCD panel for a while. Still photo shooting is not possible
while "buSY" is displayed on the screen.
3 Setting the Movie Recording Size
299