Solution
The FootageFileChunkTimeInHours global setting allows you to specify the number of hours to put in each footage file. The default value is 6 hours. Other factors such as footage file size and key frames may affect the exact segment size.
Note: The cleaner deletes complete files (not partial files); therefore, lower the setting to minimize the chance that too much data is deleted by the cleaner. See How to change the cleaner interval time.
Add a custom setting using the Manual Configuration Editor:
Type: Global
Section: Main
Key: FootageFileChunkTimeInHours
Value: <value in hours>