Preview & output are not the same?

[Paul of Chester]

Hello everyone.
I am working on a simple video with two (3 second) overlay video clips. In the preview window everything looks great. After compressing the overlay clips shrink in height revieling the top & bottom of the main clip. If I over-stretch the overlay clips they still shrink down. I have gotten it to work once (don't know why) but that rendering the audio dropped off when the overlay started and never came back. That's a separate issue.

Is there a rule I am un aware of? I have been reading this forum for two days looking for clues. I saw where one person trying to solve a different issue mentioned to streach the overlay clip by the corners only? Is that important? I also tried turning on and off the "stretch to fit" option. I am not seeing a patern? I have also tried keeping the aspect ration on and off but that does not seem to give consistant results. I am sure it is a combination of some type.

Thanks.

Main clip:

Data rate: 9421 kbps
Video: Windows Media Video 9
24 bit, 1920x1080, 29.970 frames/sec
Aspect Ratio: 1.78:1.00

Overlay clips:

Data rate: 1309 kbps
Video: Windows Media Video 9
24 bit, 1280x720, 25 frames/sec
Aspect Ratio: 1.78:1.00

[lata]

Hi Paul

One of your video files is using 29 fps and the other 25 fps, one is NTSC the other Pal.
Tell us where you live so we know which one is correct?
Fortunately they both are using widescreen 16:9

With the video in the overlay track, re-sizing by dragging the corners (double arrows) will keep it in proportion, providing you don’t drag the green square (single arrow) which will distort the frame.

If you wish to fill the screen right click the video within the preview screen for other options, Fit to Screen etc

Ok so you have set the videos in the position you want, then Share Create Video file—what options are you selecting now???????
Does the new video file look ok.