Bug Report OBS-STUDIO 23.1.0 breaks V4L ?

[darksurf]

I just noticed If I install 23.0.1 , I can add a Source and Select V4L and add my webcam, but upgrading to 23.1.0 breaks that and I just get a black screen. After looking at my options to add a source, the V4L option is missing. Downgrading back to 23.0.1 fixes the issue. Anyone else experiencing this?

 

[Tuna]

01:50:01 PM.981: os_dlopen(/usr//lib64/obs-plugins/linux-v4l2.so->/usr//lib64/obs-plugins/linux-v4l2.so): /usr//lib64/obs-plugins/linux-v4l2.so: undefined symbol: udev_new
01:50:01 PM.981: 
01:50:01 PM.981: Module '/usr//lib64/obs-plugins/linux-v4l2.so' not loaded

Perhaps you need to install some udev library to make it work. I haven't followed the changes that may have happened to the plugin.

 

[darksurf]

01:50:01 PM.981: os_dlopen(/usr//lib64/obs-plugins/linux-v4l2.so->/usr//lib64/obs-plugins/linux-v4l2.so): /usr//lib64/obs-plugins/linux-v4l2.so: undefined symbol: udev_new
01:50:01 PM.981:
01:50:01 PM.981: Module '/usr//lib64/obs-plugins/linux-v4l2.so' not loaded

Perhaps you need to install some udev library to make it work. I haven't followed the changes that may have happened to the plugin.

You would think that, but reinstalling 23.0.1 , everything works fine.

 

[Tuna]

It depends on how both versions were build. The udev support is a compile time feature. Sits either missing or present. If present it requires libudev.

 

[darksurf]

Libudev is indeed installed. I'm running Sabayon Linux (Gentoo Based) and we use systemd and udev by default.

 

[Tuna]

So where do these OBS versions come from? Compiled yourself? From the Linux distro? Maybe it is a bug at their end?

Verify that these work:

$ ldd linux-v4l2.so | grep udev
    libudev.so.1 => /lib/x86_64-linux-gnu/libudev.so.1 (0x00007fd2a8cff000)
$ nm -D /lib/x86_64-linux-gnu/libudev.so | grep udev_new
000000000001a780 T udev_new