Could not start GNOME Shell recorder but nothing is using org.gnome.Shell.Screencast

[fredericcogny]

I read the FAQs at https://github.com/phw/peek#frequently-asked-questions and

• I am confident the codecs are installed sudo apt install ubuntu-restricted-extras
• also here is the out put of journalctl | grep org.gnome.Shell.Screencast

mars 26 11:57:40 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Activating service name='org.gnome.Shell.Screencast' requested by ':1.4077' (uid=1000 pid=45001 comm="peek " label="unconfined")
mars 26 11:57:40 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Successfully activated service 'org.gnome.Shell.Screencast'
mars 26 11:57:59 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Activating service name='org.gnome.Shell.Screencast' requested by ':1.4077' (uid=1000 pid=45001 comm="peek " label="unconfined")
mars 26 11:58:00 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Successfully activated service 'org.gnome.Shell.Screencast'
mars 26 11:58:15 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Activating service name='org.gnome.Shell.Screencast' requested by ':1.4077' (uid=1000 pid=45001 comm="peek " label="unconfined")
mars 26 11:58:16 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Successfully activated service 'org.gnome.Shell.Screencast'
mars 26 12:03:39 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Activating service name='org.gnome.Shell.Screencast' requested by ':1.4613' (uid=1000 pid=50792 comm="peek " label="unconfined")
mars 26 12:03:39 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Successfully activated service 'org.gnome.Shell.Screencast'
mars 26 12:03:57 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Activating service name='org.gnome.Shell.Screencast' requested by ':1.4613' (uid=1000 pid=50792 comm="peek " label="unconfined")
mars 26 12:03:58 nova dbus-daemon[1965]: [session uid=1000 pid=1965] Successfully activated service 'org.gnome.Shell.Screencast'

here are some other things tried:

sudo apt remove --purge peek
sudo apt install peek

Peek: 1.5.1
GTK: 3.24.30
GLib: 2.70.2
Desktop: ubuntu:GNOME
Display server: X
FFmpeg version:

ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil      56. 70.100 / 56. 70.100
libavcodec     58.134.100 / 58.134.100
libavformat    58. 76.100 / 58. 76.100
libavdevice    58. 13.100 / 58. 13.100
libavfilter     7.110.100 /  7.110.100
libswscale      5.  9.100 /  5.  9.100
libswresample   3.  9.100 /  3.  9.100
libpostproc    55.  9.100 / 55.  9.100

Output format: webm
gifski enabled: false

Error details:

Could not start GNOME Shell recorder.

Missing codec or another active screen recording using org.gnome.Shell.Screencast?

Please see the FAQ at https://github.com/phw/peek#what-is-the-cause-for-could-not-start-gnome-shell-recorder-errors

[fredericcogny]

ok #1280 actually answered it

# install ffmpeg
sudo apt install ffmpeg

# launch peek like this
peek -b ffmpeg

thanks to @benjaoming