通过UDP使用gstreamer进行网络摄像头流媒体

#include <gst/gst.h>

int main(int argc, char *argv[]) {
  GstElement *pipeline, *src, *depay, *dec, *sink;
  GstCaps *caps;
  GstBus *bus;
  GstMessage *msg;

  /* Initialize GStreamer */
  gst_init (&argc, &argv);

  /* Create the elements */
  pipeline = gst_pipeline_new ("video-player");
  src = gst_element_factory_make ("udpsrc", "udp-source");
  depay = gst_element_factory_make ("rtph264depay", "rtp-depayloader");
  dec = gst_element_factory_make ("avdec_h264", "h264-decoder");
  sink = gst_element_factory_make ("autovideosink", "video-output");

  /* Set up the pipeline */
  g_object_set (src, "port", 5000, NULL);
  caps = gst_caps_new_simple ("application/x-rtp",
      "media", G_TYPE_STRING, "video",
      "clock-rate", G_TYPE_INT, 90000,
      "encoding-name", G_TYPE_STRING, "H264",
      NULL);
  g_object_set (depay, "caps", caps, NULL);
  gst_caps_unref (caps);

  /* Add the elements to the pipeline */
  gst_bin_add_many (GST_BIN (pipeline), src, depay, dec, sink, NULL);

  /* Link the elements */
  gst_element_link_many (src, depay, dec, sink, NULL);

  /* Start playing */
  gst_element_set_state (pipeline, GST_STATE_PLAYING);

  /* Wait until error or EOS */
  bus = gst_element_get_bus (pipeline);
  msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE,
      GST_MESSAGE_ERROR | GST_MESSAGE_EOS);

  /* Free resources */
  if (msg != NULL)
    gst_message_unref (msg);
  gst_object_unref (bus);
  gst_element_set_state (pipeline, GST_STATE_NULL);
  gst_object_unref (pipeline);

  return 0;
}