Gstreamer HLS pipeline creation error - c

Question

I am trying to stream a HLS Stream using gstreamer 1.0. I have a filter which works
gst-launch-1.0 -v souphttpsrc location="http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8" ! hlsdemux ! tsdemux ! h264parse ! avdec_h264 ! autovideosink
But when I try to convert this into c code, it fails.
int main(int argc, char* argv[])
{
GMainLoop *loop;
GstElement *pipeline, *source, *demuxer, *tsdemux, *h264parse, *vdecoder, *vsink;
GstElement *aacparse, *adecoder, *aconvert, *asink;
GstBus *bus;
int bus_watch_id;
gst_debug_set_default_threshold(3);
gst_init(&argc, &argv);
loop = g_main_loop_new(NULL, FALSE);
if (argc != 2)
{
g_printerr("Usage: %s <http stream source>\n", argv[0]);
return -1;
}
pipeline = gst_pipeline_new("myApp");
source = gst_element_factory_make("souphttpsrc", "http-src");
demuxer = gst_element_factory_make("hlsdemux", "hls-demuxer");
tsdemux = gst_element_factory_make("tsdemux", "ts-demuxer");
h264parse = gst_element_factory_make("h264parse", "h264parse");
vdecoder = gst_element_factory_make("avdec_h264", "h264decoder");
vsink = gst_element_factory_make("autovideosink", "videosink");
/* set the input url to the source element */
g_object_set(G_OBJECT(source), "location", argv[1], NULL);
bus = gst_pipeline_get_bus(GST_PIPELINE (pipeline));
bus_watch_id = gst_bus_add_watch(bus, bus_call, loop);
gst_object_unref(bus);
/* add elements into the pipeline */ //next aacparse
gst_bin_add_many(GST_BIN (pipeline), source, demuxer, tsdemux, h264parse, vdecoder,vsink, NULL);
gst_element_link(source, demuxer);
// this was wrong
/*gst_element_link_many(tsdemux, h264parse, vdecoder, vsink, NULL);*/
/* connect demuxer and decoder on pad added */
/*g_signal_connect(demuxer, "pad-added", G_CALLBACK(on_pad_added), vdecoder);*/
// Correct Implementation
gst_element_link_many(h264parse, vdecoder, vsink, NULL);
g_signal_connect(demuxer, "pad-added", G_CALLBACK(on_pad_added), tsdemux);
g_signal_connect(tsdemux, "pad-added", G_CALLBACK(on_pad_added), h264parse);
g_signal_connect(demuxer, "pad-added", G_CALLBACK(on_pad_added), vdecoder);
// Correct Implementation
g_print ("Starting play: %s\n", argv[1]);
gst_element_set_state(pipeline, GST_STATE_PLAYING);
g_print ("Running\n");
g_main_loop_run(loop);
/* Clean up after execution of main loop */
g_print ("Stopping Playback: %s\n", argv[1]);
gst_element_set_state(pipeline, GST_STATE_NULL);
g_print ("Quitting\n");
g_object_unref(G_OBJECT(pipeline));
g_source_remove(bus_watch_id);
g_main_loop_unref(loop);
return 0;
}
I compile the code using:
cc my_app.c -o my_app $(pkg-config --cflags --libs gstreamer-1.0)
And launch the application using:
./my_app http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8
I always get the following error:
hlsdemux gsthlsdemux.c:792:gst_hls_demux_stream_loop:<hls-demuxer> error: stream stopped, reason not-negotiated
Do I have to do anything differently?

Answer 1

// this was wrong
gst_element_link(source, demuxer);
// Correct Implementation
gst_element_link(source, demuxer,NULL);
where is your void
on_pad_added (GstElement *element,
GstPad *pad,
gpointer data); function?and take a look at here.

Answer 2

I was able to get it working. The problem was "tsdemux" and "demuxer" have to connect at run time in "on_pad_added" method.