Dear Maintainer,

when starting gnome-snapshot the program starts up fine, the picture
stays black though.

When started from the console as the logged in user, the following
errors are displayed:

ralph@surface:~$ snapshot
2024-04-16T06:12:19.254253Z  INFO snapshot::application::imp: Snapshot (org.gnome.Snapshot)
2024-04-16T06:12:19.254291Z  INFO snapshot::application::imp: Version: 46.2
2024-04-16T06:12:19.254296Z  INFO snapshot::application::imp: Datadir: /usr/share/snapshot
2024-04-16T06:12:20.193150Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-04-16T06:12:20.198665Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-04-16T06:12:20.199789Z ERROR aperture::viewfinder: Bus Error from Some("/GstCameraBin:camerabin0/GstWrapperCameraBinSrc:camerasrc/GstAutoVideoSrc:camerasrc-real-src/GstPipeWireSrc:camerasrc-real-src-actual-src-pipewir")
stream error: error output enum formats: Invalid argument
Some("../src/gst/gstpipewiresrc.c(692): on_state_changed (): /GstCameraBin:camerabin0/GstWrapperCameraBinSrc:camerasrc/GstAutoVideoSrc:camerasrc-real-src/GstPipeWireSrc:camerasrc-real-src-actual-src-pipewir")
2024-04-16T06:12:20.199835Z ERROR aperture::viewfinder: Bus Error from Some("/GstCameraBin:camerabin0/GstWrapperCameraBinSrc:camerasrc/GstAutoVideoSrc:camerasrc-real-src/GstPipeWireSrc:camerasrc-real-src-actual-src-pipewir")
Internal data stream error.
Some("../libs/gst/base/gstbasesrc.c(3177): gst_base_src_loop (): /GstCameraBin:camerabin0/GstWrapperCameraBinSrc:camerasrc/GstAutoVideoSrc:camerasrc-real-src/GstPipeWireSrc:camerasrc-real-src-actual-src-pipewir:\nstreaming stopped, reason not-negotiated (-4)")

cheese, program works without problem:

ralph@surface:~$ cheese
[19:09:28.423130575] [95032]  WARN IPAManager ipa_manager.cpp:154 No
IPA found in '/usr/lib/x86_64-linux-gnu/libcamera'
[19:09:28.423207194] [95032]  INFO Camera camera_manager.cpp:284
libcamera v0.2.0

(cheese:95032): GStreamer-CRITICAL **: 08:37:33.291:
gst_structure_get_value: assertion 'structure != NULL' failed

On Tue, 16 Apr 2024 08:38:36 +0200 Ralph Aichinger <ra@h5.or.at> wrote:
 > Sorry, forgot: Cheese starts up fine and gets a picture from my camera
 > (built in camera of Surface Laptop model 1867). Console messages from
 > cheese, program works without problem:
 >
 > ralph@surface:~$ cheese
 > [19:09:28.423130575] [95032] WARN IPAManager ipa_manager.cpp:154 No
 > IPA found in '/usr/lib/x86_64-linux-gnu/libcamera'
 > [19:09:28.423207194] [95032] INFO Camera camera_manager.cpp:284
 > libcamera v0.2.0
 >
 > (cheese:95032): GStreamer-CRITICAL **: 08:37:33.291:
 > gst_structure_get_value: assertion 'structure != NULL' failed
 >
 >

 >

Hi Ralph,

thanks for the detailed bugreport. Would you mind submitting that to
upstream ?

They are more likely to know the exact reason why snapshot is not
working as there are a lot of factors at play here. pipewire 1.0.5 was
supposed to resolve most issues but not all, it seems.

best,

On Sun, 21 Apr 2024 12:29:24 +0200 Matthias Geiger
<werdahias@riseup.net> wrote:
 > On Tue, 16 Apr 2024 08:38:36 +0200 Ralph Aichinger <ra@h5.or.at> wrote:
 > > Sorry, forgot: Cheese starts up fine and gets a picture from my camera
 > > (built in camera of Surface Laptop model 1867). Console messages from
 > > cheese, program works without problem:
 > >
 > > ralph@surface:~$ cheese
 > > [19:09:28.423130575] [95032] WARN IPAManager ipa_manager.cpp:154 No
 > > IPA found in '/usr/lib/x86_64-linux-gnu/libcamera'
 > > [19:09:28.423207194] [95032] INFO Camera camera_manager.cpp:284
 > > libcamera v0.2.0
 > >
 > > (cheese:95032): GStreamer-CRITICAL **: 08:37:33.291:
 > > gst_structure_get_value: assertion 'structure != NULL' failed
 > >
 > >
 >
 > >

Hi Ralph,

can you try the new 46.3 snapshot from unstable and see if the issue
persists?


best,


werdahias

Ralph, please confirm if you are still experiencing this issue with
gnome-snapshot 47.0.1-5 now in Debian Testing. There have also been
recent Pipewire fixes; please also restart your computer or at least
log out and log back in after installing these recent updates.

Thank you,
Jeremy Bícha

Closing since there has been no response from the reporter; feel free to
reopen if the issue remains