Hey folks,

I've got a video that appears to be 00:00:30.03:

https://pastebin.com/XRzdbQ0e

When I try to extract a thumbnail using "ffmpeg -ss 30 -i example.mp4 -vframes 
1 thumbnail.jpg" it fails with "Output file is empty, nothing was encoded(check 
-ss / -t / -frames parameters if used)":

https://pastebin.com/uxHC2GzY

It looks like any value for -ss over 29.988312̅9 fails.
Is there a way to determine the last valid value for -ss?
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