When I import from vhs to a computer    into Pinnacle 16 some scenes are ok but some will have this grey sign with a cirkle Arrow meaning i can't see the picture frame

I use König Video Grabber. The format is mpeg 4 which i turn into avid files

I can see the whole film on the timeline without  these grey signs with the cirkle Arrow but when I export it and create an image the grey signs are there

 Any one who knows

Windows 7

Radeon 5670

Tommy/Sweden