1.9.12+ win10/11 -t spout opens explorer folder \AppData\Roaming\Spout not Spout source

[vanderhoff]

Windows 10/11 PRO
On version 1.9.12 - 1.10.1 When using Spout as source the command line opens an explorer window to
(user)\AppData\Roaming\Spout and then closes the uv.exe process

This happens on each run even if the directory already exists

1.9.12 SpoutLibrary.dll 469kb
1.9.11 SpoutLibrary.dll 2899kb

`C:>C:\ug\1_9_12\uv.exe -t spout:name=test -d gl
UltraGrid 1.9.12 (tags/v1.9.12 rev 669a27d built Oct 21 2025 08:14:30)

Display device : gl
Capture device : spout
Audio capture : none
Audio playback : none
MTU : 9000 B
Video compression: none
Audio codec : PCM
Network protocol : UltraGrid RTP
Audio FEC : none
Video FEC : none

GL setup: fullscreen: OFF, deinterlace: OFF
[GL] OpenGL 2.0 is supported...
[GL] Buffer depth - R: 8b, G: 8b, B: 8b
[spout cap.] initialized successfully, waiting for input...
Control socket listening on port 52703
Setting GL size 512x512 (512x512).`
working as expected

`C:>C:\ug\1_9_11\uv.exe -t spout:name=c1 -d gl
UltraGrid 1.9.11 (tags/v1.9.11 rev dd95a8a built Aug 20 2025 11:23:37)

Display device : gl
Capture device : spout
Audio capture : none
Audio playback : none
MTU : 9000 B
Video compression: none
Audio codec : PCM
Network protocol : UltraGrid RTP
Audio FEC : none
Video FEC : none

GL setup: fullscreen: OFF, deinterlace: OFF
[GL] OpenGL 2.0 is supported...
[GL] Buffer depth - R: 8b, G: 8b, B: 8b
[spout cap.] initialized successfully, waiting for input...
Control socket listening on port 49387
Setting GL size 512x512 (512x512).
[spout cap.] Server updated - name: c1, size: 1280x720, fps: 60, codec: RGB
SSRC 0x7ed8ce37: 128/128 packets received (100.0000%), 0 lost, max loss 0
[video dec.] New incoming video format detected: 1280x720 @60.00p, codec RGB
[display] Successfully reconfigured display to 1280x720 @60.00p, codec RGB
Setting GL size 1280x720 (1280x720).
[GL] 1 frame(s) dropped!
Last message repeated 6 times
Video dec stats (cumulative): 111 total / 104 disp / 7 drop / 0 corr / 0 miss
Pbuf: total 6290176/6290176 packets received (100.00000%).
Exit`

[MartinPulec]

Thanks for reporting. I could have been able to reproduce the problem. I'll take a look into it in a near feature.

It seems like there might be some compatibility issues between UltraGrid and the Spout library. As you noticed the size change, this is because the Spout dependency needed to be updated due to the upstream changes (see da5c166). It doesn't seem to be much harmful but there werent't much other changes around this time so I don't know. I'll keep you updated.

[MartinPulec]

Ok, I've got some news. First of all, the problem was caused by UltraGrid incompatibility with Spout v2.007.017, which was used since the above linked commit.

Unfortunately I didn't manage to fix the compatibility with current Spout code yet but I managed to revert to the version 2.007.016, which seem to be working right now. I'm going to fix the compatibility with 2.007.017 later on.

I came across a different problem with NVIDIA Optimus. The capture didn't work unless explicitly set rendering via Intel (window displayed on notebook display). Interestingly it didn't occur in that version v1.9.11. Not sure why but I've created a workaroud for that (in referenced commit above). NVIDIA is no longer enforced (don't know what caused that).

The fixes should be already included in continuous build and it will also land to v1.10.2 later (most likely this month)