Syphon client broken in 32.0

[odisfm]

I can see syphon sources in the dropdown in the source properties window but they appear empty/transparent in OBS. these sources appear correctly in other apps. was working a couple hours ago on 31.x

using macos 15.5, log attached

 

[frederickjh]

I am trying to setup a EOS Canon camera via Syphon on MacOS 15 and OBS 32..0.1 and ran into this too. A basic Syphon client receives the image but I get a black screen in OBS Studio. In my searching it seems that this as been an issue in the past as well. I will not be at the Mac for a few days but then I will test with version 31.x.

@odisfm It maybe time to file a bug report on Github. I will let you know what I find out.

 

[Kosmoss]

In version 31.1.2 everything worked fine, in version 32.0.1 black screen

 

[frederickjh]

@odisfm You can always test with Syphon Simple client and server to see if OBS is the issue.

 

[Vobys]

Same here, black screen with OBS 32.0.1

 

[novelscale]

Same here, tested with two different Syphon app

https://obsproject.com/logs/Bl2BEz1YJVDu8jQ1

08:32:37.338: All scene data cleared
08:32:37.338: ------------------------------------------------
08:32:37.340: Switched to scene 'Scena'
08:32:37.341: Created scene collection 'TestSyphoon' (clean, TestSyphoon.json)
08:32:37.341: ------------------------------------------------
08:32:42.594: User added source 'Client Syphon' (syphon-input) to scene 'Scena'
08:32:45.232: Invalid IOSurface Buffer
08:32:45.232: device_texture_create_from_iosurface (GL) failed
08:34:06.000: Invalid IOSurface Buffer
08:34:06.000: device_texture_create_from_iosurface (GL) failed
08:34:15.996: User Removed source 'Client Syphon' (syphon-input) from scene 'Scena'
08:34:20.965: User added source 'Client Syphon' (syphon-input) to scene 'Scena'
08:34:26.032: Invalid IOSurface Buffer
08:34:26.032: device_texture_create_from_iosurface (GL) failed
08:35:03.149: Invalid IOSurface Buffer
08:35:03.150: device_texture_create_from_iosurface (GL) failed
08:35:37.866: Invalid IOSurface Buffer
08:35:37.867: device_texture_create_from_iosurface (GL) failed
08:35:54.244: User Removed source 'Client Syphon' (syphon-input) from scene 'Scena'
08:35:59.497: User added source 'Client Syphon' (syphon-input) to scene 'Scena'
08:36:03.733: Invalid IOSurface Buffer
08:36:03.733: device_texture_create_from_iosurface (GL) failed
08:36:19.700: Invalid IOSurface Buffer
08:36:19.701: device_texture_create_from_iosurface (GL) failed

 

[Fenrir]

This is a known issue. The short version is that we fixed improper handling of Syphon inputs, which broke a few sources that were sending bad data, but not technically broken. A fix should be in the next release, but testing with this PR to confirm it fixes your issue is welcome.

libobs: Fix Syphon by treating IOSurface pixel format 0 as 32BGRA; mac-syphon: Fix Metal opaque effect by gxalpha · Pull Request #12688 · obsproject/obs-studio

Description Per the Apple documentation, when 0 is returned from IOSurfaceGetPixelFormat, the IOSurface is invalid. Prior to 53ad05d however, any invalid surfaces were (likely accidentally) treat...

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