Udpsrc to autovideosink

[philippe renon]

Not sure it explains your issue, but you don't set the same caps in the CLI pipeline and C pipeline.

And you might want to get the detailed error message (using debug output or some other mean). 

    Le Mercredi 13 septembre 2017 9h49, chrplus3 <christian.bauer at mekra.de> a écrit :
 

 I've just seen, that raw text is not working in this mailing list.

Here is the code again:
Working:
gst-launch-1.0 -v \
udpsrc port=5016 caps="application/x-rtp,encoding-name=JPEG,payload=26" ! \
rtpjpegdepay ! jpegparse ! queue max-size-time=0 max-size-buffers=0 !
jpegdec ! autovideosink

Not working (because element link failed):
...
GstElement *pipeline, *source, *depay, *parse, *queue, *decode, *sink;
GstCaps *caps;
gst_init(&argc, &argv);
pipeline = gst_pipeline_new("pipe");
source = gst_element_factory_make("udpsrc", "source");
depay = gst_element_factory_make("rtpjpegdepay", "depay");
parse = gst_element_factory_make("jpegparse", "parse");
queue = gst_element_factory_make("queue", "queue");
decode = gst_element_factory_make("jpegdec", "decode");
sink = gst_element_factory_make("autovideosink", "sink");
caps = gst_caps_new_simple(
    "video/x-rtp",
    "encoding-name", G_TYPE_STRING, "JPEG",
    "payload", G_TYPE_INT, 26, NULL);
g_object_set(G_OBJECT(source),
    "port", 5016,
    "caps", caps, NULL);
g_object_set(G_OBJECT(queue),
    "max-size-time", 0,
    "max-size-buffers", 0, NULL);
gst_bin_add_many(GST_BIN(pipeline), source, depay, parse, queue, decode,
sink, NULL);
if(!gst_element_link_many(source, depay, parse, queue, decode, sink, NULL))
{
    g_printerr("Elements could not be linked.\n");
    gst_object_unref(pipeline);
    return -1;
}
gst_element_set_state(pipeline, GST_STATE_PLAYING);
...



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