Cannot get screen to play clip in expert mode

Thank you community for your advise. I will answer the questions you sent back to the best of my knowledge.

The computer is a bit of a screamer. It was built with editing and rendering in mind. It is even water cooled. In answer to your questions here goes. The processor info is Intel Core i7 6850K @ 3.60GHz 39 °C
Broadwell-E/EP 14nm Technology, I am trying a clip that is about 10 minuses. This clip is a family trip to a Star Trek thing. If is fairly old and also a low resolution. To down load it to my computer I took the original (video tape - probably 45 years old) I used a Sony Player that also burns DVD's and this is definitely low resolution compared to what is used today.. Knowing this I am using  DV-NTSC as my codec. That is I took the DVD file and used Any Converter to change it to the DV-NTSC. I then saved it to my hard drive with the following video parameters:

Frame Size 780 X 420

Frame Rate 30 fps

Sample Rate 48000 HZ

I can include other info you need. I could understand a problem with the video so I used a low frame size. If I slide the time marker, the video is there and with this lower frame size as whsprague suggested. It does now play and renders When rendering it did not have a orange line like as Steve suggested. Can I assume that any video with low resollution will not work with high res video codec's?

Thank you for your ideas. Sucerss is great.

Mark Carnes

Based on the little information you provided, this is a guess and hunch.  There is something wrong with your Audio Hardware settings.  Can you post a screen shot of that page?  Default audio output should maybe be "None".

Tons of memory? Wow! That must be a pretty heavy computer!

Which processor do you have?

When you add a clip to your timeline, is there a yellow orange 'render' line above it? This render line is an indication that your project settings do not match your video specs -- and that will greatly reduce the program's performance.