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Recording Formats
By default, recordings are encoded using the H.264 codec and formatted as .mp4 files which include AAC
audio at 48 kHz. These files can be played back using most modern media players. It is recommended to
use a media player such as VideoLAN’s VLC as it is more interoperable on a wider variety of computer
configurations.
Recordings can be made using a user configurable (via the Web UI) bitrate of 2MB/s to 10MB/s. The
maximum size for any recording is 3.99GB. Typically, at a bitrate of 5MB/s. 2GBs of capacity are required
for every hour of recording. For long duration recordings the unit automatically closes the file when
3.99GB is reached and creates a new separate but adjoining file with its respective time and date stamp.
Multiple files are utilized for large capacity drives and long recordings. There should be no data loss even
though multiple files are created.
Filenames
The default filename follows the syntax of “_[DD]-[MM]-[YY]_[HH].[MM].[SS].mp4” and increments by one
digit upon each recording. User defined filenames can be set up using the Web UI selecting the channel
and typing in the name in the Clip Name field.
Figure 8. ATOM-USB Web UI Clip Name Field
Every recording is time and date stamped based on the unit’s system clock. The system clock is set at
factory default unless it is defined from the Web UI. To set the time and date, click on the icon
located at the top right corner of the Web UI and click on the Set Date/Time button.
Note: See the Configuration Menu section on page12 for more information regarding the
Set Date/Time setting.