I opened up a Vegas Pro 17 project into Vegas Pro 18 and it was telling me that it couldn't find a certain .MOV file. So, I found it on my hard drive and when I attempted to choose the file and open it up, Vegas Pro 18 said that the file was unsupported. So, I went to my file library where I keep all my .MP4's and .MOV's and tried to drag over that .MOV file into the video track and it would not work and gave the same error message. However, SOME of the .MOV's WOULD WORK but not all of them!
Here is the SOLUTION I found that fixed it. Go to OPTIONS>PREFERENCES>DEPRECATED FEATURES> and then click "ENABLE THE QUICKTIME PLUGIN" to turn it on as it is disabled by default. Now, all .MOV's import properly!
Victory!
SOLUTION for not all .MOV files importing into Vegas Pro 18
Debbie-Whitmer
wrote on 8/19/2020, 10:16 AM