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
/* 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]
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