I used solidworks fow simulation and tried to create a video of the flow trajectory, but got a blank video. Please how can this problem bw solved. I observed it in solidworks 2009 and 2012
I have experienced similar problems with this. The issue however is not normally solid works. It is usually your video codec.
Try opening the video using this free and very good software (link below). It can open almost anything without the need for additional codec packages.
If this does not work, when you select the video compression you can choose not to compress the video. This will generate a massive file which is unusable as it is. Open it with windows movie maker or similar and simply save it under the default settings. Delete the original massive file and hold onto the new WMP format that will be a good size.
Hope this helps