Split into ogg files

[Diogo Rodrigues]

Hello!

I would like to create a pipeline that takes in a single mp3 audio file and
splits it into several 10-second vorbis/ogg files, but I'm having issues
linking the elements.

I have already made a similar pipeline that takes a single mp3 audio file
and splits it into several 10-second mp3 files with Xing headers by using
lamemp3enc instead of vorbisenc, and xingmux instead of oggmux. The
mp3-to-mp3 pipeline works just fine, but the mp3-to-ogg is not doing so
well, because splitmuxsink is not being able to link the muxer (vorbisenc)
with the sink (oggmux+filesink). Could you please point out what I'm
missing?

Here's the complete C code of the pipeline:

===
    GstElement *source    = gst_element_factory_make("filesrc", "source");
    GstElement *parser    = gst_element_factory_make("mpegaudioparse",
"parser");
    GstElement *decoder   = gst_element_factory_make("avdec_mp3",
"decoder");
    GstElement *converter = gst_element_factory_make("audioconvert",
"converter");

    GstElement *encoder   = gst_element_factory_make("vorbisenc",
"encoder");
    GstElement *oggmux      = gst_element_factory_make("oggmux", "oggmux");
    GstElement *filesink  = gst_element_factory_make("filesink",
"filesink");
    GstElement *bin       = gst_bin_new("bin");

    GstElement *sink      = gst_element_factory_make("splitmuxsink",
"sink");

    GstElement *pipeline = gst_pipeline_new("test-pipeline");

    if (!pipeline || !source || !parser || !decoder || !converter ||
!encoder || !oggmux || !filesink || !bin || !sink) {
        g_printerr("Not all elements could be created.\n");
        *ret = -1; return ret;
    }

    g_object_set(source, "location", "audio.mp3", NULL);

    gst_bin_add_many(GST_BIN(bin), oggmux, filesink, NULL);
    if(gst_element_link_many(oggmux, filesink, NULL) != TRUE) {
        g_printerr("Not all elements could be linked in the encoder
bin.\n");
        gst_object_unref(bin);
        gst_object_unref(pipeline);
        *ret = -1; return ret;
    }

    GstPad *sink_pad = gst_element_get_static_pad (oggmux, "sink");
    GstPad *ghost_sink_pad = gst_ghost_pad_new_from_template ("bin-sink",
sink_pad, gst_pad_get_pad_template(sink_pad));
    gst_pad_set_active (ghost_sink_pad, TRUE);
    gst_element_add_pad (bin, ghost_sink_pad);
    gst_object_unref (sink_pad);

    g_object_set(sink, "location", "out_%d.ogg", NULL);
    g_object_set(sink, "muxer", encoder, NULL);
    g_object_set(sink, "sink", bin, NULL);
    g_object_set(sink, "max-size-time", 10000000000 NULL);

    gst_bin_add_many(GST_BIN(pipeline), source, parser, decoder, converter,
sink, NULL);
    if (gst_element_link_many(source, parser, decoder, converter, sink,
NULL) != TRUE) {
        g_printerr("Not all elements could be linked.\n");
        gst_object_unref(pipeline);
        *ret = -1; return ret;
    }
===

Using gstreamer v1.20.1 compiled from source
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