Export process and video size

[Elusien]

There are various reasons how this could happen, see:

Video export file size smaller then original

Hi, I am joining two videos together in SHOTCUT. Each video is 30min long (12GB in size). When I export my compiled video the exported size is not 2x 12GB (24GB), but 6,83GB only. As pertaining the video quality it seems there is no loss (exported in 4K). Should not the exported file be 24GB? Am I doing something wrong? Thank you for any help or explanantion.

Download mediainfo (MediaInfo - Download), open both files (original and exported) on it, click on menu item View->Text take a screenshot and post it so we can compare the properties.