Make sure that you have disable the hardware acceleration option under the General Settings. If you still receive blank recorded video, please try this:
For Windows 2000/XP/2003
Click on Start Windows Control Panel, Display, Settings, Advanced, Troubleshooting tab, and set Hardware Acceleration to None.
For Windows Vista or Windows 7
Click on Start Windows, Control Panel, Display Settings, Advanced Settings, Troubleshooting tab, Change Settings and set Hardware Acceleration to None.
Please make sure that you have check the "Record Audio" under the Audio Settings. Check that if you have selected the right audio device and the source. For example;
If you are capturing the sound from internet streaming, CDs, sound from player like RealPlayer, Windows Media Player, QuickTime, and what you hear from the speakers. Look for "Stereo Mix, Stereo, Loopback, Wave, Wave Out Mix, Record Master or All".
For sound capturing from the external devices like radio, tapes, CDs, TV, telephone, and etc. Look for "Line-In".
For direct sound capture from mic, look for "Mic".
(Please note that the source name might be varies according to what sound cards you have)
Windows Vista and Windows 7 users please refer to this guide
Click on File menu and select Open Output Folder. It will popup the directory where recorded video is saved. You may also refer to the recording details for the output location.
