GStreamer: Difference between revisions
imported>Malteneuss Extend page |
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Name coreelements | Name coreelements | ||
Description GStreamer core elements | Description GStreamer core elements | ||
Filename /nix/store/ | Filename /nix/store/p39g1.../libgstcoreelements.so | ||
... | ... | ||
</syntaxhighlight> | </syntaxhighlight> | ||
or by using it in a pipeline. Here, we could play a video from the local machine with | |||
<syntaxhighlight lang="nix"> | <syntaxhighlight lang="nix"> | ||
$ gst-launch-1.0 filesrc location=my_video.mp4 ! videoconvert ! autovideosink | $ gst-launch-1.0 filesrc location=my_video.mp4 ! videoconvert ! autovideosink | ||
</syntaxhighlight> | </syntaxhighlight> | ||
If the plugins are not correctly made available to the higher level tools, you'll get an error | |||
<syntaxhighlight lang="nix"> | |||
$ gst-inspect-1.0 filesrc | |||
No such element or plugin 'filesrc' | |||
</syntaxhighlight> | |||
== Troubleshooting == | |||
==== erroneous pipeline: no element "filesrc" ==== | |||
In some cases while creating a shell using "mkShell" or "writeShellApplication" just setting the "runtimeInputs" is not enough. It's necessary to manually set the "GST_PLUGIN_SYSTEM_PATH_1_0" environment variable.<ref>https://discourse.nixos.org/t/how-to-use-gst-plugins/6345</ref> | |||
Adding the following export to your script, sets "gstreamer" and "gst-plugins-base" and "gst-plugins-good" paths. Similarly you can add any other "gst-plugins" package as well. | |||
<syntaxhighlight lang="shell"> | |||
export GST_PLUGIN_SYSTEM_PATH_1_0="${gst_all_1.gstreamer.out}/lib/gstreamer-1.0:${gst_all_1.gst-plugins-base}/lib/gstreamer-1.0:${gst_all_1.gst-plugins-good}/lib/gstreamer-1.0" | |||
</syntaxhighlight>Note: "gstreamer.out" is the derivative that contains "/lib" directory for that package. | |||
<references /> | |||
==== nautilus: "Your GStreamer installation is missing a plug-in." ==== | |||
[[File:Screenshot From 2025-03-28 09-58-50.png|thumb|nautilus: "Your GStreamer installation is missing a plug-in."]] | |||
To fix the issue I found the following solutions: | |||
* use <code>nix-shell</code>:<syntaxhighlight lang="bash"> | |||
nix-shell -p gst_all_1.gstreamer gst_all_1.gst-plugins-base gst_all_1.gst-plugins-good gst_all_1.gst-plugins-bad gst_all_1.gst-plugins-ugly gst_all_1.gst-libav gst_all_1.gst-vaapi --run "nautilus" | |||
</syntaxhighlight> | |||
* [[File:Screenshot From 2025-03-28 12-51-31.png|thumb|"Audio and Video Properties" of "Properties" window of nautilus after fix]]use <code>sudo nano /etc/nixos/configuration.nix</code> and set the environment variable <code>GST_PLUGIN_PATH</code>:<syntaxhighlight lang="nix" line="1">{ config, pkgs, ... }: | |||
{ | |||
environment.systemPackages = with pkgs; [ | |||
gst_all_1.gstreamer | |||
gst_all_1.gst-plugins-base | |||
gst_all_1.gst-plugins-good | |||
gst_all_1.gst-plugins-bad | |||
gst_all_1.gst-plugins-ugly | |||
gst_all_1.gst-libav | |||
gst_all_1.gst-vaapi | |||
]; | |||
environment.variables = { | |||
GST_PLUGIN_PATH = "/run/current-system/sw/lib/gstreamer-1.0/"; | |||
}; | |||
}</syntaxhighlight><syntaxhighlight lang="bash"> | |||
sudo nixos-rebuild switch | |||
</syntaxhighlight>A system restart is needed to get the environment variable set system wide. | |||