Screenshotting Video - Getting Black / Blank Screen

http://www.snagitguide.com/67/snagit-black-screen/

Have you ever tried to capture video but instead of getting the video you end up with a black or grey screen? The problem is usually due to graphics hardware acceleration being used to display the image/video.
Newer media players normally use graphics hardware acceleration on your system.
Read on to see how to solve this…

Graphics hardware performs a “hardware overlay” of video on the screen, which bypasses the normal Windows display memory that Snagit captures.
Most video capture programs which capture video from a video camera use “hardware overlay” by default for their video preview. This problem affects all screen capture programs, and even the image put in the clipboard by the Print Screen key.
The solution is to disable any hardware acceleration in the application that is playing the video or disable hardware acceleration system wide. Because this affects all applications on the system, it may cause performance problems for some applications and some applications may not run at all.
How to disable graphics hardware acceleration globally for all applications



http://pixelmetrics.com/Tips/VidBlank/MediaPlayer.php

Windows Media Player Fix blank captures from Windows Media Player by turning off hardware acceleration while recording. First, identify the Media Player version installed on your machine by appearance, then follow the appropriate instructions.

Media Player 11 for Windows Vista 1 Open Media Player 11. 2 Click Now Playing, then More Options.... 3 Click the Performance tab. 4 Uncheck Turn on DirectX Acceleration. 5 Click OK, then close and restart the player.

Media Player 11 for Windows XP 1 Open Media Player 11. 2 Click Now Playing, then More Options.... 3 Click the Performance tab. 4 Center the Video acceleration knob. 5 Click OK, then close and restart the player.

Media Player 10 1 Open Media Player 10. 2 Click the Access application menus    button in the top-right corner. 3 Click Tools / Options. 4 Click the Performance tab. 5 Center the Video acceleration    knob. If the knob is disabled,    click Restore Defaults. 6 Close and restart the player.