The Screencast-O-matic recorder may record empty (black) video at times. These are two methods that may help alleviate the problem.
If you're trying to record a full screen game or application, you should run the game or application in a normal windowed mode instead.
Some anti-virus programs have a feature to block screen capture. This may block the Screencast-O-Matic recording app from recording video. If you have one of the following anti-virus programs, try changing the settings to enable screen capture.
- Trustee Rapport
If you have a different anti-virus, disable it to see if it causes the problem. If you find this to be the case, please let our support team know and we will add it to the list above.