Is it possible to recreate webms with a broken duration?

by labcraft59   Last Updated May 23, 2020 00:01 AM - source

I've seen a few webms that have very unusual durations, even in the negatives. I've been trying to recreate it with ffmpeg, but I don't know enough of that program to make it work, if it would work at all. Is there anything else I could use? Do I have to do something between converting it from mp4 to webm?

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