Canon EOS 7D Instruction Manual page 161

Total Movie Recording Time and File Size Per Minute
Due to the file system, movie shooting will stop automatically if the file
size of a single movie clip reaches 4 GB. It takes approx. 12 min. at
[1920x1080] and [1280x720] or approx. 24 min. at [640x480] to reach
4 GB file size. You can resume shooting another movie by pressing the
<0> button. (A new movie file starts being recorded.)
Movie-recording
Size
6
[1920x1080]
5
4
8
[1280x720]
7
8
[640x480]
7
An increase of the camera's internal temperature may cause movie

shooting to stop before the maximum recording time shown in the table
above (p.164).
The maximum recording time of one movie clip is 29 min. 59 sec.

The semi-transparent mask on the top and bottom and on the left and

right will not be recorded.
Total Recording Time
4 GB Card
12 min.
12 min.
24 min.
x Menu Function Settings
16 GB Card
49 min.
49 min.
1 hr. 39 min.
File Size
330 MB/min.
330 MB/min.
165 MB/min.
161