How long will it take to extract a csv of keywords from 40,000 photos in a hierarchy of directories and subdirectories? THX.
There's really no way to answer that question. It depends upon your computer. Where the files are located, on a SSD or on a nas. And they all small 50x50 pixel emoji images or huge 100 meg+ tiff files. Way too many variables and I doubt anyone has done any time trials on such an operation.
The only thing I could say is that it would probably take less time than it would to copy all those files.
Don't use the -csv option with such a large number of files. Use JSON (-j) or XML (-X) instead. Read the -csv documentation for details.
- Phil