Thank you Jose! It worked!
2011/6/20 José Alburquerque <[email protected]>
> Resending a second time because the message didn't make it to the list.
> Sorry.
>
> On Mon, 2011-06-20 at 03:50 -0400, Phong Cao wrote:
> > Hello everybody,
> >
> >
> > I am trying to create a simple music manager software that can get and
> > display tags from a stream using GStreamermm (without playing it). My
> > plan was to open the media file, set its state to PAUSED and then read
> > the Gst::TagList from the Gst::Bus of the stream. Here is how I did
> > it:
> >
> >
> > /* Create a "fakeplay" playbin2 */
> > Glib::RefPtr<Gst::PlayBin2> fakeplay =
> > Gst::PlayBin2::create("fakeplay");
> >
> >
> > if (!fakeplay) {
> > std::cerr << "The playbin could not be created." << std::endl;
> > }
> >
> >
> > /* Set an uri for the playbin and set playbin's state to PAUSED: */
> > fakeplay->property_uri() = fileuri;
> > fakeplay->set_state(Gst::STATE_PAUSED);
> >
> >
> > /* Get a Gst::MessageTag (msgtag) from the Gst::Bus of the playbin
> > ("fakeplay"). */
> > Glib::RefPtr<Gst::Message> tempmsg =
> > fakeplay->get_bus()->pop(Gst::CLOCK_TIME_NONE, Gst::MESSAGE_TAG);
> >
> > Gst::MessageTag msgtag;
> > msgtag.MessageTag(tempmsg); //the error is here
>
> You're probably trying to convert the Gst::Message to a Gst::MessageTag.
> The correct way to do that would be:
>
> Glib::RefPtr<Gst::MessageTag> msgtag =
> Glib::RefPtr<Gst::MessageTag>::cast_static(tempmsg);
>
> >
> >
> > /* Now parse() the msgtag to get a Gst::TagList */
> > Gst::TagList taglist = msgtag.parse();
> >
> >
> > /* Insert tag on treeview using member function
> > TopWin::insert_tag_on_mb_treeview() */
> > TopWin::insert_tag_on_mb_treeview(taglist, fileuri);
> >
> >
> > However, after trying to compile this code I got an error:
> > error: conversion from ‘Glib::RefPtr<Gst::Message>’ to non-scalar type
> > ‘Gst::MessageTag’ requested
> >
> >
> > And I think I know the reason for the error. In the 3rd step I was
> > unable to retrieve a Gst::MessageTag. However, I really do not know
> > how to retrieve it. I could not use Gst::Bus::add_watch to watch for
> > Gst::MESSAGE_TAG since I just want to import the file, not running the
> > MainLoop.
> >
> >
> > I have been trying to solve this problem for several hours and could
> > not find a better way to get the Gst::TagList WITHOUT PLAYING the
> > stream.
> >
> >
> > Do you guys here have any better idea to handle this situation? If so
> > please share!
> >
> >
> > Thank you for reading my message! I hope you guys have a good day!!
> >
> >
> >
> >
> > Best regards,
> >
> >
> >
> >
> > Phong Cao,
> > [email protected]
> >
> >
> > _______________________________________________
> > gtkmm-list mailing list
> > [email protected]
> > http://mail.gnome.org/mailman/listinfo/gtkmm-list
>
> --
> José
>
>
>
>
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