I have imported a clip, and the pictures that appear on Video Trackl 1 used to follow the progress of the video.
I have started editing, and now the pictures that appear on Video Trackl 1 'freeze' and just repeat one picture until the end of the video.
If I move the cursor across the affected area, the video is frozen.
If I use the '>' button below the Sequence Preview in the upper right-hand area of the screen, the video appears to play ok.
If I move the cursor to the 'frozen' area, and then use the '>' button below the Sequence Preview in the upper right-hand area of the screen, the video jerks back and forth over a frame or two, and a message is displayed at the bottom left of the Sequence Preview screen showing 'Building Preview ... Please wait' and nothing progresses any further.
The video plays ok on other players, so I don't think the clip is at fault. I've tried re-importing it, and it makes no difference.
Please advise.
Mike.