Arch Linux User Repository

@asura thanks for the comment, I added qt6-declarative to the make dependencies. I had it as a dependency and didn't notice it's required in the build.

I've also patched tracker-neuralnet with the latest specification of onnxruntime_cxx_api.h, the build wasn't working (tested with onnxruntime-cpu, need help testing the other variants).

As mentioned in previous comments, when wine or other dynamically linked dependencies are updated, a rebuild may be required: paru -S --rebuild opentrack

@judorange thanks for your remarks. I've addressed all the issues you pointed out:

• added libgomp and openmp to optional depends (are you building with clang instead of GCC? in such case you are right about using openmp instead of libgomp... I'm wondering if that's your case)
• print warning messages if any of onnxruntime or openmp libs are missing (upstream makes it fail silently, true, I guess because not everyone may be interested in the neuralnet feature)
• added qt6-5compat to dependencies
• patched low fps issue #2151 with PR #2146 (this fix is not shipped with 2026.1.0 but it's so basic I back-ported it)

I had some trouble to enable neuralnet b/c of missing openmp cf https://github.com/opentrack/opentrack/blob/6e733b5b1b9703c80b4e9cf9e0451cb9dc7cbbf7/tracker-neuralnet/CMakeLists.txt#L14

Without it, it will just silently fail, and build without the feature.

Like the previous comments, I had to rebuild after installing https://archlinux.org/packages/extra/x86_64/onnxruntime-cpu/

All good now. Thx for package!

edit: for the "Camera Settings" to work, you also need qt6-5compat else it logs a /usr/bin/qv4l2: error while loading shared libraries: libQt6Core5Compat.so.6: cannot open shared object file: No such file or directory when clicking the button and just do nothing

edit2: if you are stuck with a 10 FPS capture but you know [ie checking the V4L2 bench, OBS, etc] that your webcam can work at 60FPS then you may be hitting this: https://github.com/opentrack/opentrack/issues/2151

@asura thanks for the comment, I added qt6-declarative to the make dependencies. I had it as a dependency and didn't notice it's required in the build.

I've also patched tracker-neuralnet with the latest specification of onnxruntime_cxx_api.h, the build wasn't working (tested with onnxruntime-cpu, need help testing the other variants).

As mentioned in previous comments, when wine or other dynamically linked dependencies are updated, a rebuild may be required: paru -S --rebuild opentrack

Thanks for the package!

I needed to install qt6-declarative to make it build. /usr/lib/qt6/bin/lupdate which runs during the build links against libQt6Qml.so.6 which is available through qt6-declarative.

I installed onnxruntime only after discovering neural wasn't available in the inputs drop down, paru -S --rebuild opentrackwas needed to get it working.

@gugah Thank You for your time on this repo

I've added a post-install message for the X-Plane plugin because it requires user intervention to move it to the proper plugin directory.

So far I've tested:

Inputs: PointTracker 1.1, neuralnet-tracker

Outputs: Flightgear, UDP, Wine (with the plugin in X-Plane 11)

I may want to try the aruco tracer next, but it requires https://aur.archlinux.org/packages/aruco or even maybe the variant https://github.com/opentrack/aruco. @jebez you may be interested in installing onnxruntime-cpu before opentrack to add another input (neuralnettracker)

Done, I wonder why no upstream answer, they prefer Window$ than Linux? Argh...

@jebez I had to check upstream to answer your question: you'll see here (https://github.com/opentrack/opentrack/blob/master/proto-mouse/CMakeLists.txt) that proto-mouse only builds in windows. Unfortunately, upstream does not provide mouse emulation in linux. You should follow up the conversation in https://github.com/opentrack/opentrack/discussions/2060

Calm, thanks for you free & open source works, well I'm a simple user, "build https://github.com/opentrack/aruco and link it to opentrack" I even knows not that... I created my account 1st for https://aur.archlinux.org/packages/filezilla-server?O=10#comment-1012542 .

So it is possible to have here all the inputs & outputs as on Window$? If yes why not?
Personally I at least want mouse emulation, for video games shooter.

@jebez, I'm a co-maintainer of this package, doing it just voluntarily (the package was not even compiling when I updated it last year). I'm neither an upstream (opentrack) dev.

Feel free to submit a request an take over the package, or again, build it yourself instead of complaining here. btw, you just created an account to complain in comments? what are you? an open source PM?

Need the aruco paper marker tracer? build https://github.com/opentrack/aruco and link it to opentrack...

I'm checking why the xplane plugin doesn't show up (just noticed the windows build doesn't have it either, but opentrack.xpl is built in our package but maybe not installed)