Recording with no sound?

Ok so I was doing a video and I hit record on audacity and it was recording, I made sure it was when I began but once I was finished and checked the recording it just shows this blank track. Whats wrong with it? Can i fix this?

I don’t know what you did. If your drive was failing, or if you did not have permission to write to your Audacity temporary directory, or if an antivirus program was deleting your recording as you made it, you would have a flat line for the length of your recording.

If you pressed DELETE or BACKSPACE by mistake, try Edit > Undo Delete.