error loading mp4

[thempel]

Hi, When my minimserver starts up, I get this error:
Error: no supported brand found in file xxxx.mp4

Since for an mp4, "brand" means the ftyp code.
A mediainfo dump of the file shows:

Complete name : O:\Other N-Z\The Warning\15-06-08.The Warning.Nuevo Leon - Monterrey.v\15-06-08.The Warning.Nuevo Leon - Monterrey.mp4
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 0000.02 (qt )
File size : 15.4 GiB
Duration : 42 min 18 s
Overall bit rate : 52.2 Mb/s
Frame rate : 26.102 FPS
Title : 15-06-08.The Warning.Nuevo Leon - Monterrey
Album : 15-06-08.The Warning.Nuevo Leon - Monterrey.v
Album/Performer : The Warning
Performer : The Warning
Genre : Rock
Recorded date : 2015
Encoded date : 2025-04-03 18:43:04 UTC
Tagged date : 2025-04-03 18:43:04 UTC
Writing application : Wondershare Capture

'qt' is a completely standard ftyp code. And the file plays perfectly wherever I've tried. What is the meaning of this error? What can I do about it?

thanks!