I shoot mostly in UHD/4K and have "automatically build proxies" checked in Preferences. Every so often, I will encounter an error message "failed to build proxy" for certain files. Doesn't happen all the time, just occasionally. Any idea why?
I have no idea what would cause this, without knowing the exact type of video you are using when this happens.
The video proxies that are generated by Vegas, live in the same folder your source videos came from.
If you experience problems, it may be a good idea to delete the proxies and then regenerate them.
Video proxies look like a white sheet of paper and end with the file extension .sfvp0
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