[gst-devel] using volume element

Sameer Naik sameer at damagehead.com
Mon Oct 15 18:47:42 CEST 2007

there's an example available in the gst-plugins-base package
this should take care of all your worries.


On Mon, 2007-10-15 at 20:12 +0530, Vinod Nanjaiah wrote:
> Hi!
> I tried changing playback volume in the following way, but it didn't work.
> GstElement *volume;
> g_object_set (G_OBJECT(volume), "volume", 0.5, NULL);
> I get the following error when I execute the program.
> (helloworld:7358): GLib-GObject-CRITICAL **: g_object_set: assertion
> `G_IS_OBJECT (object)' failed
> Please let me know if there is something that I am doing incorrectly.
> Regards,
> PN
> ------------------------------
> Message: 8
> Date: Sat, 13 Oct 2007 17:02:35 +0300
> From: Stefan Kost <ensonic at hora-obscura.de>
> Subject: Re: [gst-devel] using volume element
> To: Vinod Nanjaiah <Vinod_Nanjaiah at mindtree.com>
> Cc: gstreamer-devel at lists.sourceforge.net
> Message-ID: <4710CFFB.5010009 at hora-obscura.de>
> Content-Type: text/plain; charset=ISO-8859-1
> hi,
> Vinod Nanjaiah wrote:
> > Hi All!
> > Can someone please point me to an example that shows how to use the volume
> > element in a program to control the playback volume?
> > 
> > The following link only shows how to set volume from command line using
> > gst-launch.
> >
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-plu
> > gins/html/gst-plugins-base-plugins-volume.html
> > 
> > I searched extensively on the net but could not find any information on
> this.
> Its a gobject with properties. Just
> g_object_set(volume_element,"volume",0.5,NULL);
> will set volume to 50%
> Stefan
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