I am fairly new to video editing and I have been working on a tutorial video for a couple of days. On the Internet I searched for a free and easy video editor and found the "AVS Video Editor".
After downloading it I made my video with clips I had recorded with "Cam Studio" including voice/sound attached to those clips, these where all screen captures. I imported those into the program and added subtitle's. When I started producing the video which was quite long (36 minutes) it crashed on a Runtime error, driver software stopped responding. I figured the computer was having a hard time and I would cut it down to 15 minutes since it is to be uploaded on youtube anyway.
So after the cut down I produced again and it worked fine, even on HD 1080P. But when I checked the video there where black blocks and bars all over the video, mostly between letters and text bars I had filmed. I tried different outputs, Youtube HD video, HD 1080P, HD 720P and H264/AVC, but all give the same black blocks, grain like effect. These blocks are not in the original.
I searched the web for solutions but I couldn't find anything even related to my problem. Hopefully some-one here can help me.
Screencap of the problem below: