Missing dependency on libqt6-widgets6

[fuglede]

I have installed obs-backgroundremoval using the .deb on Debian while having picked up OBS itself from the Debian Testing. When I try to add an effect filter to a video capture device, the background removal filter does not show up.

$ apt show obs-studio
Package: obs-studio
Version: 29.1.3+dfsg-2
Priority: optional
Section: video
Maintainer: Debian Multimedia Maintainers <debian-multimedia@lists.debian.org>
Installed-Size: 21.4 MB

$ apt show obs-backgroundremoval
Package: obs-backgroundremoval
Version: 1.1.7
Status: install ok installed
Priority: optional
Section: devel
Maintainer: roy.shil@gmail.com
Installed-Size: 427 MB
Download-Size: unknown
APT-Manual-Installed: yes
APT-Sources: /var/lib/dpkg/status
Description: obs-backgroundremoval built using CMake

One relevant thing that then shows up in the log is this:

09:55:21.313: os_dlopen(/usr//lib/x86_64-linux-gnu/obs-plugins/obs-backgroundremoval.so->/usr//lib/x86_64-linux-gnu/obs-plugins/obs-backgroundremoval.so): libQt6Widgets.so.6: cannot open shared object file: No such file or directory
09:55:21.313: 
09:55:21.313: Module '/usr//lib/x86_64-linux-gnu/obs-plugins/obs-backgroundremoval.so' not loaded

Indeed, after installing libqt6-widgets6, the effect filter shows up. So it seems this ought to be added as a dependency, or at least spelled out in the docs that this could be an issue.

One thing that confused me a bit is that the release page suggests that there are installation instructions on https://obs-ai.github.io/obs-backgroundremoval/, but that page 404s because it looks like obs-ai has been renamed to occ-ai.

[umireon]

The URL on the release page was fixed.

[PhillCli]

It's a deeper hole than that libqt6-widgets.so missing. AFAIK, .deb are built on https://github.com/occ-ai/obs-backgroundremoval/blob/main/.github/workflows/push.yaml#L34

ubuntu-22.04 which uses a newer glibc, and one of the symbols included in newer versions, will cause a fail on systems with older glibc, i.e. ubuntu-20.04, with __libc_single_threaded.so.

error: os_dlopen(/usr/local//lib/obs-plugins/obs-backgroundremoval.so->/usr/local//lib/obs-plugins/obs-backgroundremoval.so): /usr/local//lib/obs-plugins/obs-backgroundremoval.so: undefined symbol: __libc_single_threaded

error: os_dlopen(/usr/local//lib/obs-plugins/obs-backgroundremoval.so->/usr/local//lib/obs-plugins/obs-backgroundremoval.so): /usr/local//lib/obs-plugins/obs-backgroundremoval.so: undefined symbol: __libc_single_threaded

warning: Module '/usr/local//lib/obs-plugins/obs-backgroundremoval.so' not loaded

To make matters worse, even recompiling on ubuntu:20.04 doesn't seem to work, as some dependency that's getting pulled with FetchX.cmake is already using this symbol making re-compiling from current src is not possible, unless patching every upstream pull (pre-built OpenCV), and re-building without glibc >= 2.32 symbols. I did not have time to narrow on that.

I would appreciate, noting that pre-built PPA will work only with glibc >= 2.32, which is the first to contain said symbol, per release-notes glibc 2.32

EDIT: it's pre-built opencv from https://github.com/obs-ai/obs-backgroundremoval-dep-opencv

nm build_x86_64/_deps/opencv-src/lib/*.a | grep -i "libc_single_threaded" 
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded
                 U __libc_single_threaded

[umireon]

@royshil We decided not to support Debian by the deb package so can we close this issue as not planned?

[royshil]

i removed Qt dep in #538 - woudn't that help with Debian?

[royshil]

538 was merged and removed Qt dependency.

[umireon]

@royshil Can we close this issue as completed?