Video file create with Gstreamer can't be played by Slack

Arjen Veenhuizen arjen at
Wed Nov 25 21:04:28 UTC 2020

omer.tal wrote
> Hello sir,
> Can you please explain your answer. I'm not familiar with the concepts you
> used (moov, atom).
> Thank you

Sorry about that, looks like the mailinglist ate the answer. I updated my
previous post (set faststart = true on qtmux) 

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