video loads to left of 0??

I have one video file (of many that work) that, when I bring it to the timeline, the video loads to the left of the 0 frame mark, audio to the right where it is supposed to be. This strip will not play if I press the play button. I can position the “cursor” along the audio on the timeline, hit play, and the cursor snaps back to 0.

I can open this file in VLC or bring it to the Sony Vegas timeline, render a second instance of it. It just will not open properly in blender.

What would cause this problem?

Thanks.

Caruso