To: inHYPHENcorrect
After researching similar posts, they mention to use AVS Video Converter. (I Still Want To Know How To Do This With AVS Video Editor.)
I figured out what AVS Video Converter stretched the video projects to.
The source video is 1:1.
I want to loop part of it while playing music. (audio .mp3)
So I make smaller videos for each segment.
I then go into these segment videos and delete the original audio and I produce even more videos.
I add these segments with no audio together with the .mp3.
After making all these videos for some reason kept stretching it.
It was 1:1. Some where it made it a 4:3 and then some how it stretched it to some thing called "Width:Height"
I do not know how AVS Video Editor keeps doing it, but since I am trying to make a 16:9 with a 1:1 stretched to Width:Height, and since AVS Video Editor is not stretching it, I decided to use AVS Video Converter. I make a 4:3 by changing the input from "Original" to 4:3 and output to 4:3. I make the video.
And then I take this video I just made from AVS Video Converter and open AVS Video Converter again.
I set the input to Width:Height and the output to 16:9 and the result is a 16:9 video with narrow vertical black bars.
... and since I discovered AVS Video Converter's Aspet Correction Settings, I think I can stretch a 1:1 to 16:9 with no bars by setting AVS Video Converter to Input 16:9 Output 16:9
I guess I will make even more videos of the 1:1 videos that I have by stretching them into 16:9 with no black bars.
(These are Instagram videos, which loves to make things 1:1. I no longer use and instead have 16:9 cameras with YouTube not Instagram.)
But I still do not know why AVS Video Editor stretches the videos, and why does it only do it sometimes? Sometimes it seems to have a 1:1 video inside a 16:9 with black bars, a 4:3 video inside a 16:9 with black bars, and sometimes the results are a Width:Height video inside a 16:9 with black bars.
I guess if I really want to have a Width:Height inside a 16:9 with black bars, I can do that by using AVS Video Converter.