Hello, I know I'm behind the times using ver 13 but it still suits my needs.

I've run into a surprising issue that I don't know how to solve. I have a 854x480 video 59.940 fps that has some line artifacts that appear randomly in the video over two frames. I have placed a jpeg lasting 2 frames (edited to remove the line error) on top of the actual video. When I play the timeline the line errors are completely removed. However, when I render the video to mp4 using Sony AVC/MVC at 59.940 only some of the lines are removed. Also, on some experimental clips I have noted that the original video is 38 sec 15 frames and the render is 38 sec 14 frames. This seems odd. Also, if I drag the jpeg to cover 3 or 4 frames it may or may not remove the line in the render. I cannot figure out why this works sometimes and not other times - this partial solution should be unnecessary.

Thanks in advance for any ideas!