Screencast in Gnome Shell doesn't work

Question

Hi folks
I tried to record a screencast in the Gnome Shell using the built-in feature, but it's not working; there's no red dot and no file in my home directory. Is there a package I need to install? Or is it possible that the Keyboard-Shortcut is in conflict with another program, if so does somebody know how to change it?
Thanks

Answer 1

I've installed all gst plugins -- and that worked.
[r@prime ~]$ pacman -Qs gst
local/gnome-media 3.4.0-2
    Sound recorder and GStreamer 0.10 configuration tool for GNOME
local/gst-plugins-bad 1.0.6-1
    GStreamer Multimedia Framework Bad Plugins
local/gst-plugins-base 1.0.6-1
    GStreamer Multimedia Framework Base Plugins
local/gst-plugins-base-libs 1.0.6-1
    GStreamer Multimedia Framework Base Plugin libraries
local/gst-plugins-good 1.0.6-1
    GStreamer Multimedia Framework Good Plugins
local/gst-plugins-ugly 1.0.6-1
    GStreamer Multimedia Framework Ugly Plugins
local/gst-vaapi 0.5.3-1
    GStreamer Multimedia Framework VA Plugins
local/gstreamer 1.0.6-1
    GStreamer Multimedia Framework
local/gstreamer0.10 0.10.36-1
    GStreamer Multimedia Framework
local/gstreamer0.10-bad 0.10.23-3
    GStreamer Multimedia Framework Bad Plugin libraries (gst-plugins-bad)
local/gstreamer0.10-bad-plugins 0.10.23-3 (gstreamer0.10-plugins)
    GStreamer Multimedia Framework Bad Plugins (gst-plugins-bad)
local/gstreamer0.10-base 0.10.36-1
    GStreamer Multimedia Framework Base plugin libraries
local/gstreamer0.10-base-plugins 0.10.36-1 (gstreamer0.10-plugins)
    GStreamer Multimedia Framework Base Plugins (gst-plugins-base)
local/gstreamer0.10-ffmpeg 0.10.13-1 (gstreamer0.10-plugins)
    Gstreamer FFMpeg Plugin
local/gstreamer0.10-good 0.10.31-1
    GStreamer Multimedia Framework Good plugin libraries
local/gstreamer0.10-good-plugins 0.10.31-1 (gstreamer0.10-plugins)
    GStreamer Multimedia Framework Good Plugins (gst-plugins-good)
[r@prime ~]$
Just wonder which ones plugins package is responsible for screencast recording? Does gst and gstreamer packages may conflict with each other when they installed together?