So Im putting together a movie but when i render it, some of the clips of video will turn out to be nothing but what looks like a screenshot.
Four or five clips end up looking like this, and I have no clue what happened. They stay on screen for as long as they would if they were moving, and the music still goes fine. Can someone please tell me how to stop this from happening?

i have never had this problem.......

maybe the media is offline??

is this the first time you have rendered with Vegas??

i have rendered with vegas before and it worked fine
that was on a different computer but nothing is different on this one, its basically brand new

i do have video clips overlapping my ones from my video camera, and the video clips that are overlapping the ones from my camera have chroma keyer on them
i dont know if that affects anything though