Could not play camera stream

[Joe Barnett]

Running snapshot, I get a UI error message "could not play camera stream", a black window, and the following log messages:

2024-04-12T16:32:17.738325Z INFO snapshot::application::imp: Snapshot (org.gnome.Snapshot)
2024-04-12T16:32:17.738340Z INFO snapshot::application::imp: Version: 46.0
2024-04-12T16:32:17.738346Z INFO snapshot::application::imp: Datadir: /usr/share/snapshot

(snapshot:923479): Adwaita-WARNING **: 09:32:17.773: Using GtkSettings:gtk-application-prefer-dark-theme with libadwaita is unsupported. Please use AdwStyleManager:color-scheme instead.
2024-04-12T16:32:18.266073Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-04-12T16:32:18.270673Z ERROR aperture::viewfinder: Could not start camerabin: Element failed to change its state
2024-04-12T16:32:18.272590Z 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")
2024-04-12T16:32:18.272628Z 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)")

Running the flatpak org.gnome.Snapshot version of the app, everything works ok, fwiw

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: gnome-snapshot 46.0-1ubuntu2
ProcVersionSignature: Ubuntu 6.8.0-11.11-generic 6.8.0-rc4
Uname: Linux 6.8.0-11-generic x86_64
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: GNOME
Date: Fri Apr 12 09:31:36 2024
InstallationDate: Installed on 2019-08-17 (1701 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190305.1)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: gnome-snapshot
UpgradeStatus: Upgraded to noble on 2024-03-23 (20 days ago)

[Launchpad Janitor (janitor)]

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