CODEWITHSUNDEEP
windowsfilesynchronization
alphanoob
alphanoob

Reputation: 21

What is the accuracy of file creation time?

I wanna do some measurements and video recording at the same time. It is crutial that I can align them after the measurement. My idea is to get the creation time of the video in ms and than add 1/fps milliseconds for each frame and look up the measurement closest to that calculated time.

If I use C# for example and use the CreationTime-property of the recorded video, I should be able to do this synchronisation, shouldn't I? How good is the CreationTime? I need an accuracy about 60 ms...

Upvotes: 2

Views: 1845

Answers (2)

Anon
Anon

Reputation: 11

File time stamps on FAT drives are rounded to the nearest two seconds (even number) when the file is written to the drive. The file time stamps on NTFS drives are rounded to the nearest 100 nanoseconds when the file is written to the drive. Time Stamps Change When Copying From NTFS to FAT

Upvotes: 1

Mark Ransom
Mark Ransom

Reputation: 308432

According to this link, the creation time on FAT volumes is good down to 10 milliseconds. I can only assume that NTFS would do better, but I can't verify that.

http://msdn.microsoft.com/en-us/library/ms724290(v=vs.85).aspx

Upvotes: 0

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