[gst-devel] Media Player development Questions

[Raj Swaminathan]

Tim,
I followed your suggestions ... got playbin and used its volume property. I
also created a separate thread for running the gst loop and checking bus
messages and so far things are good.
Thanks for your help.

Thanks Ajay, Eric for your suggestions too.

regards,
raj

Thanks for your responses. Sorry for getting back so late ...  just in from
vacation...

*>For stream volume control you should use playbin's "volume" property.
>The GStreamer mixer interface (GstMixer) is to control hardware mixer
>levels, you usually don't want that in a playback application. It's also
>not very nice to use. If you don't use playbin, add a volume element to
>your pipeline (alternatively: audiosinks which support stream volumes
>will also have a "volume" property).
*
Does this allow volume changing when the pipeline is playing .. if so how
would you do that ?




On Mon, Sep 1, 2008 at 3:05 AM, Tim-Philipp Müller <t.i.m at zen.co.uk> wrote:

> On Thu, 2008-08-28 at 13:08 -0500, Raj Swaminathan wrote:
>
> Hi,
>
> > I am new to Glib programming and gstreamer. I am trying to build a
> > basic media player application. So far i have gstreamer pipelines up
> > and rendering various media formats.
>
> For a media player you'll probably want to use playbin (or even
> playbin2) from gst-plugins-base. There's no need to create your own
> pipelines.
>
>
>
> > 1) Im trying to reference the gstalsamixer plugin for volume control
> > and muting. I understand its an interface and im trying to find out
> > whats the best way to access the interface methods like
> > gst_alsa_alsa_mixer_get_volume etc ...
> >     Could somebody please provide a code snippet that can show this ?
>
> For stream volume control you should use playbin's "volume" property.
> The GStreamer mixer interface (GstMixer) is to control hardware mixer
> levels, you usually don't want that in a playback application. It's also
> not very nice to use. If you don't use playbin, add a volume element to
> your pipeline (alternatively: audiosinks which support stream volumes
> will also have a "volume" property).
>
>
> > 2) When designing the media player, whats the best way to accept user
> > input. Do i spool a separate thread for rendering media while the main
> > thread waits for user input or is there a better way within gstreamer
> > to do this?
>
> GStreamer does all its playback in threads of its own anyway, so the
> main thread is yours. All you need to do is check the
> pipeline's/playbin's GstBus for messages (errors, tags, state changes)
> from time to time.
>
> Cheers
>  -Tim
>
>
>
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20080911/d07963e7/attachment.htm>