That’s 45 orders of magnitude more probable than the collision.”Īnd the extra check for the size and video length reduce this risk even further. This leads to a probability of such an event occurring in the next second to about 10 -15. ” A mass-murderer space rock happens about once every 30 million years on average. Or to put it into context with an example: The risk that the program will say that two different files are the same by mistake as a result of the same checksum being generated from different video files is virtually non existing.
The algorithm used to calculate and to compare videos is the same used by several cryptocurrencies like Bitcoin. And if you have scanned for duplicates at some time, it will be quicker carrying out the next scan after you have added more files to your catalog. This also means that you can close the program and it will resume the next time where it left off. The checksum is then stored in your catalog, so each file will only need to have the checksum calculated one. To calculate this checksum, the program needs to read every single byte of the video file, and that can take some time for large video files. To do this check it calculates a 256 bit checksum based on the whole video file. The Repair window will open, click on the “Check duplicate” tab to get to the find duplicate videos tool.
#Video file duplicate finder how to
How to find and clean duplicate video filesįrom Fast video cataloger ( ) select File then Repair. Perhaps you downloaded the same file twice, moved video files from a digital camera more than once (just to be sure… we’ve all done it!), renamed a video file and then didn’t know you already had a file and so on. How do you end up with duplicate video files? When you have a large video collection it is pretty likely you eventually will end up with multiple copies of the same video stored in different folders or on different disks.
Duplicate video files (exact copies of a file stored in different folders ) not only occupy unnecessary disk space, but also makes it harder to have an organized video collection.Īdditionally if you add meta data to only one copy of the video, that data is not shared with the other duplicate files.įast Video Cataloger has a quick and easy tool to help you find duplicate videos, wherever they lie in your catalog.
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