I'm using Camtasia 8 trial version and here is the issue I'm having. When I view the video before it is produced it looks great. When I produce the video it has black lines in the end product. I would like to purchase this software but it is no use if I continue to get the black lines in the finished copy. Am I doing something wrong? I tried re-recording and inserting new clips and then the new clips have glitches.