I have a pipeline for playing an MKV content.
In the demux "pad-added" handler, I used to link the video_0 with a queue
and the remaining video related elems (convert, glsink etc)/.
audio_0 is connected to a queue, ac3_parse, ac3_decode etc.
audio_1 is ignored.
The pipeline works fine.
Now I want to be able to switch the audio track.
For that purpose I've created an "input-selector"
in the demux pad-added handler, audio_0 is linked to input-selector:sink_0
and audio_1 is linked to input-selector:sink_1.
The linking code looks like:
GstPadTemplate* padtemplate = nullptr;
padtemplate =
gst_element_class_get_pad_template(GST_ELEMENT_GET_CLASS(data->audio_selector),
"sink_%u");
sink_pad = gst_element_request_pad(data->audio_selector,
padtemplate, NULL, NULL);
g_print("Obtained request pad %s for audio branch.\n",
gst_pad_get_name(sink_pad));
sink_pad = gst_element_get_static_pad(data->audio_selector,
requested_pad.data());
...
ret = gst_pad_link (new_pad, sink_pad);
if (GST_PAD_LINK_FAILED (ret)) {
g_print ("Type is '%s' but link failed.\n", new_pad_type);
} else {
g_print ("Link succeeded (type '%s').\n", new_pad_type);
// GST_DEBUG_BIN_TO_DOT_FILE(GST_BIN(data->pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "pipeline");
}
g_object_set(data->audio_selector, "active-pad", sink_pad, nullptr);
But finally, the pipeline never goes to GST_STATE_PLAYING.
I don't know what I'm missing.
Knowing that the a "queue" element is just after the "input-selector"
element.
I don't see a relevant log message.
Any suggestion is welcome.
K.
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