Nikon D300 User Manual page 607

▪ 640×424 mode: 248 MB for a 5-minute video, 992 MB
for 20 minutes, 826 KB per second. Full-length movie
can be stored on a DVD only.
▪ 320×216 mode: 119 MB for a 5-minute video, 447 MB
for 20 minutes, 398 KB per second. Full-length movie
can be stored on a DVD or CD.
Remember, these values may vary greatly according to the
complexity of the scene and how much motion is in the video.
These are
medium-complexity subject with little movement. Your
storage experience may vary.
The D300S's factory default video mode is set to
pixels (3:2 aspect ratio), which is good for keeping the video
file sizes down somewhat. However, this is not an HD mode.
If you want to make even smaller videos, you can choose
320×216 pixels
allows you to shoot up to 20-minute video clips. That is
generally a sufficient length for many uses.
Video clips are limited in length to 5 minutes for
high-resolution
sufficient resolution to be displayed on an HD device, such as
an HDTV.
The file format used by the D300S's video is the popular
Audio Video Interleave (AVI) format. This is handled by
virtually all computer movie players and is the default format
for Microsoft Windows Media Player. The actual video
frames recorded inside the AVI file are in Open DML JPEG
video and Motion JPEG format.
base values
(3:2 aspect ratio). Each of these two modes
1280×720 (16:9
607
I found by
aspect ratio or 720p). This is
videoing a
640×424