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M3 pro mac tearing video issue when outputing to barco projector


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Hello

We been having an issue playing films in our cinema. We are currently using Qlab 4 and I'm playing a pro res 4k proxy file. We keep on getting this tearing video issue. see video attached. Has anyone had this problem before? This also happens the same if you play video through VLC.

We tested this on a m2 Macbook air and the M3 Macbook pro. with the same result. Playing through HDMI to a Qsys box thats connected to a Barco 4k projector . We also connected a apple tv box to the qsys box and the same result happens.

See attached video

spec for mac pro

Apple M3 Max

48 GB

Mac os Sonoma Version 14.3.1 (23D60)

This doesn't occur if you use a dell i5 windows machine using vlc player or a m1 pro macbook pro using Qlab 4.

Could do with some advice here.

Link to video

Tearing issue

 

Thanks 

Matthew

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your picture link is "access denied"

Playing a prores file needs quite a lot of system resources, though the spec looks plenty capable - maybe the computer is just on the edge of running out of oomph? or busy doing something else?  If you transcode the file to another format does it change the behaviour?

Edited by timsabre
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I would suggest that if you're seeing the issue with multiple source devices, and the artifact doesn't present on a paused video, then the issue is really with the transmission system. You say that changing the source machine, and even swapping to a completely different source and content still gives tearing on the output, so try bypassing the qsys boxes and go straight into the projector.

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