Gstreamer - decodebin - program number

[Duchassin Frederic]

Hello,

 

I found very poor documentation or examples with “autoplug-select” signal but I try to selectr the right stream with this code :

 

static GstAutoplugSelectResult cb_autoplug_select (GstElement      *bin,

                       GstPad            *pad,

                       GstCaps           *caps,

                       GstElementFactory *factory,

                       gpointer           user_data)

{

    gchar * capsstr = gst_caps_to_string (caps);

    gchar * factorynamestr = GST_OBJECT_NAME (factory);

 

    g_print ("autoplug-select %s: %s", factorynamestr, capsstr);

 

    if(strcmp(factorynamestr, "tsdemux") == 0) //tsdemux used

        {

            int val = 21;

        g_object_set(G_OBJECT(factory), "program-number ", val, NULL);

        }

 

    /* Try factory. */

    return GST_AUTOPLUG_SELECT_TRY;

}

 

But it doesn’t work ! 

Message receive is :

(QML_LibpcapGstreamerUart:802): GLib-GObject-WARNING **: g_object_set_valist: object class 'GstElementFactory' has no property named 'program-number '

 

Have you got an idea about the problem ?

 

Fred

 

 

 

 

 

De : gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] De la part de Nicolas Dufresne
Envoyé : vendredi 21 juillet 2017 20:14
À : Discussion of the development of and with GStreamer
Objet : Re: Gstreamer - decodebin - program number

 

Le vendredi 21 juillet 2017 à 13:25 +0000, Duchassin Frédéric a écrit :

Hello,

 

I try to use gstreamer to decode a TS file.

I use decodebin because it’s fantastic to automatically detect to decoder, parser…needed ! 

My TS file can contain H264 video or mpeg2, and audio could be dolby, aac, mpeg1…. So decodebin is perfect to construct the pipeline.

But my main problem is that I would like to change the program number to decode ?

 

Do you know a way to do this ?

 

(tsdemux can do that this with “program_number”  but I can’t put tsdemux before decodebin. It doesn’t work)

 

decodebin has a signal called "autoplug-select". Also, the tsdemux property is named "program-number" with a -.

 

 

 

 

Salutations / Best Regards

-----------------------------------------------------------------

 

Fred

 

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