The .MOV files do not preview and render in Vegas 14 very often. The imported files only reproduce the audio. BUT when I have a BIG project with many of the shots taken on an iPhone 7 (.MOV) the program always does not preview nor render this video file.

I know this is an already known issue and I was suggested no install an older version of Quicktime (7.50.61.0) in order to fix the problem. The newer version of Quicktime does reproduce the iPhone files (and previews well), but only in a small project, after a few iPhone files on the timeline, the iPhone files become black. I managed to correct that a few times by opening any other program/app and re-clicking on Vegas 14, so that the files become "offline" and reload. But if you install the older version of Quicktime it would work just ok with this small/medium sized project (the preview on Vegas from these files running the older version of Quicktime seem to have a lag, but the render is fine). On bigger projects it is not working anymore, the preview is always bad/slow and now I always fail to render correctly, trust me I tried for the last 3 hours.

I was able to finish the project on the timeline, but after "re-opening" Vegas dozens of times, so that those .MOV files could preview. When you render it is a different story, because many of the files turn "black". Unfortunately I have a 22 minute video in 1080p with many of the shots on iPhone 7 and I can not render my project, because at least one of the iPhone files turn "black". I used all my "tactics" to render this project, but I can't render. This a HUGE headache.

There a few things that I could have done if I wanted to render the final project BUT would take me several hours if not days. Those would be:

- Render individually the .MOV files to .MP4

- Split the project in (five?! parts) in .MP4 and group them together afterwards

*These options would take several hours and if I needed to do that with all my future projects, using Vegas would not be an option.

Video of the situation: