Update your graphics driver/ repoair your CoDecs/ whatever. You did provide zero system information, so this is as good as it gets for now.
I updated my drivers but still it didnt work. My other prog. such as Premiere Pro CS6 appera to be working just fine. It used to work btw...
I'm Using After Effects CS6 the trail version.
I downloaded it a week ago.
I am using Windows Vista Ultimate.
No error messsages appear.
I'm trying to creat a Comp. out of a video. ( Dragging the video to create new comp. button)
It used to work on Windows 7 Ultimate.
The other programs i use such as Premier Pro CS5, Photoshop CS5.5 Ilustrator CS5 are working just fine.
I have no third-party Plug-ins installed.
Processor: AMD Phenom 9850 Quad-Core Proccesor 2.50 GHz
RAM: 3 GB
System type: 64bit
Graphic Card: ATI Radeon HD 4800
I have no third party hardware installed.
I am using Open GL.
The problem appera on my RAM Preview and on my final ouyput.
And, no im not using Multi Frame renderind.
I'ts probably the h.264 codec used by your camera. What kind of camera? Do you have any 3rd party codec packs installed?
Also, how do you have previews set in the composition? Are you using open GL for previews. This is set in the Composition window using the fast previews icon...
I'm using a Fujifilm HS20 EXR, and no i don't have any 3rd party codec installed. And i'm sorry but i don't know what Open GL is...