navigator.mediaDevices.getUserMedia + MediaRecorder create WEBM files without duration metadata. This library appends missing metadata section right to the file blob.
In line 465 you should not write 'video/webm' but instead use the same type as found in the original blob.
I put it in as function argument in line 475.
That might be audio/webm
In line 465 you should not write
'video/webm'
but instead use the same type as found in the original blob. I put it in as function argument in line 475. That might beaudio/webm
Thanks for your code.