GNOME Snapshot doesn't show webcam image

[Marcos Alano]

I'm getting errors when I try to use GNOME Snapshot on Ubuntu Noble:
➜ snapshot
2024-03-28T19:30:02.289308Z INFO snapshot::application::imp: Snapshot (org.gnome.Snapshot)
2024-03-28T19:30:02.289323Z INFO snapshot::application::imp: Version: 45.2
2024-03-28T19:30:02.289327Z INFO snapshot::application::imp: Datadir: /usr/share/snapshot
libEGL warning: egl: failed to create dri2 screen
2024-03-28T19:30:02.675094Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-03-28T19:30:02.679375Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-03-28T19:30:02.680012Z 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(689): on_state_changed (): /GstCameraBin:camerabin0/GstWrapperCameraBinSrc:camerasrc/GstAutoVideoSrc:camerasrc-real-src/GstPipeWireSrc:camerasrc-real-src-actual-src-pipewir")
2024-03-28T19:30:02.680031Z 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(3175): 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)")
2024-03-28T19:30:02.680074Z ERROR aperture::viewfinder: Bus Error from Some("/GstCameraBin:camerabin0/GstFileSink:videobin-filesink")
Could not open file "cap_%d" for writing.
Some("../plugins/elements/gstfilesink.c(507): gst_file_sink_open_file (): /GstCameraBin:camerabin0/GstFileSink:videobin-filesink:\nsystem error: Permission denied")
2024-03-28T19:30:02.680081Z ERROR aperture::viewfinder: Bus Error from Some("/GstCameraBin:camerabin0/GstFileSink:videobin-filesink")
GStreamer error: state change failed and some element failed to post a proper error message with the reason for the failure.
Some("../libs/gst/base/gstbasesink.c(5906): gst_base_sink_change_state (): /GstCameraBin:camerabin0/GstFileSink:videobin-filesink:\nFailed to start")
2024-03-28T19:30:02.680318Z ERROR aperture::viewfinder: Bus Error from Some("/GstCameraBin:camerabin0/GstFileSink:videobin-filesink")
Could not open file "cap_%d" for writing.
Some("../plugins/elements/gstfilesink.c(507): gst_file_sink_open_file (): /GstCameraBin:camerabin0/GstFileSink:videobin-filesink:\nsystem error: Permission denied")
2024-03-28T19:30:02.680325Z ERROR aperture::viewfinder: Bus Error from Some("/GstCameraBin:camerabin0/GstFileSink:videobin-filesink")
GStreamer error: state change failed and some element failed to post a proper error message with the reason for the failure.
Some("../libs/gst/base/gstbasesink.c(5906): gst_base_sink_change_state (): /GstCameraBin:camerabin0/GstFileSink:videobin-filesink:\nFailed to start")

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: gnome-snapshot 45.2+vendored-0ubuntu1
Uname: Linux 6.8.2-x64v4-xanmod1 x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Mar 28 16:31:40 2024
InstallationDate: Installed on 2021-11-26 (853 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
SourcePackage: gnome-snapshot
UpgradeStatus: Upgraded to noble on 2024-02-23 (34 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[lotuspsychje (lotuspsychje)]

Ubuntu desktop 24.04 development branch @ 13/04/2024

Im getting similar errors on launching gnome-snapshot but on a newer version as the

bug filer, aka 46.0-1ubuntu2 with an error: 'could not play camera stream'

2024-04-13T15:51:14.787471Z INFO snapshot::application::imp: Snapshot (org.gnome.Snapshot)
2024-04-13T15:51:14.787485Z INFO snapshot::application::imp: Version: 46.0
2024-04-13T15:51:14.787489Z INFO snapshot::application::imp: Datadir: /usr/share/snapshot
2024-04-13T15:51:15.120628Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-04-13T15:51:15.123211Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-04-13T15:51:15.124225Z 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: Ongeldig argument
Some("../src/gst/gstpipewiresrc.c(689): on_state_changed (): /GstCameraBin:camerabin0/GstWrapperCameraBinSrc:camerasrc/GstAutoVideoSrc:camerasrc-real-src/GstPipeWireSrc:camerasrc-real-src-actual-src-pipewir")
2024-04-13T15:51:15.124248Z 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(3175): 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)")

The webcam device seems to be found on my end:

pw-dump | grep default.video.source
      { "subject": 0, "key": "default.video.source", "type": "Spa:String:JSON", "value": { "name": "v4l2_input.pci-0000_05_00.4-usb-0_4_1.0" } },

Possibly upstream bug https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/3959 ?