How to run with the specifically installed gstreamer version on Ubuntu?

cfd new newcfd at
Thu Apr 27 19:03:06 UTC 2023

Thank for your reply, Tim. 
I set 
then try to run my pipeline and get the same error message
Warning: erroneous pipeline: no element "vah264dec"
gstreamer 1.22.2 is built and installed successfully.

    On Thursday, April 27, 2023, 01:06:38 p.m. EDT, Tim-Philipp Müller via gstreamer-devel <gstreamer-devel at> wrote:  
 On Thu, 2023-04-27 at 15:45 +0000, cfd new via gstreamer-devel wrote:

no help with
export GST_PLUGIN_PATH=/opt/gstreamer/lib

That's not right, it should be /opt/gstreamer/lib/gstreamer-1.0/ as you had before.
You probably want to set GST_PLUGIN_SYSTEM_PATH, but also it shouldn't really be needed if your app picks up the right anyway, since it will default to looking in the prefix it was installed into anyway.

/opt/gstreamer/bin/gst-inspect-1.0 -b shows libgstcodecs-1.0 is in the blacklist

This isn't really a cause for concern, since this is a library not a plugin (just an effect of you setting the plugin path to the library dir).
Cheers Tim

Any help?
 On Thursday, April 27, 2023, 10:09:20 a.m. EDT, cfd new <newcfd at> wrote: 

Hi, Guys,
   I installed gstreamer 1.22.4 under opt/gstreamer in Ubuntu 22.04 which has 1.20.3. Also libva and vaapi driver are built with it.They all are installed under the same dir  /opt/gstreamer. I set the following environment variables
export LD_LIBRARY_PATH=/opt/gstreamer/lib/:$LD_LIBRARY_PATHexport PATH=/opt/gstreamer/bin:$PATHWhen I tried to run a pipeline, I got the following messageWarning: erroneous pipeline: no element "vah264dec".vah264dec is in plugin-bad and it is definitely installed. 
but /opt/gstreamer/bin/gst-inspect-1.0 -b shows is in the blacklist/opt/gstreamer/bin/gst-inspect-1.0 vah264dec shows no such element or plugin "vah264dec"
I also tried to set 
export GST_PLUGIN_PATH==/opt/gstreamer/lib/gstreamer-1.0and removed cache file in ~/.cache/gstreamer
The result is same.
What else should I do to remove codecs from the blacklist and make it available?

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