写一个deepstream c++版本推流代码

以下是一个基本的DeepStream C版本推流代码示例，它使用Nvidia DeepStream SDK和GStreamer库。这个示例使用H.264编码器，并将数据流推送到RTSP服务器。

#include <stdio.h>
#include <stdlib.h>
#include <gst/gst.h>
#include <gst/rtsp-server/rtsp-server.h>

#include <deepstream_common.h>
#include <deepstream_sink_bin.h>

#define RTSP_PORT "8554"
#define SOURCE_WIDTH 1920
#define SOURCE_HEIGHT 1080
#define SOURCE_FPS_N 30
#define SOURCE_FPS_D 1
#define CODEC_H264 "h264"

static void
cb_newpad (GstElement *decodebin,
           GstPad     *decoder_src_pad,
           gpointer    user_data)
{
  gchar *name;
  GstCaps *caps;
  GstElement *source = (GstElement *) user_data;
  GstPad *source_sink_pad = gst_element_get_static_pad (source, "sink");
  GstPad *sink_pad = gst_element_get_static_pad (decodebin, "sink");

  name = gst_pad_get_name (decoder_src_pad);
  g_print ("A new pad %s was created\n", name);

  caps = gst_pad_query_caps (decoder_src_pad, NULL);
  if (!gst_caps_is_fixed (caps)) {
    g_print ("Dynamic pad created, linking...\n");
    if (gst_pad_link (decoder_src_pad, source_sink_pad) != GST_PAD_LINK_OK)
      g_error ("Failed to link decoder to source");
  } else {
    g_print ("Static pad created, linking...\n");
    if (gst_pad_link_full (decoder_src_pad, sink_pad, GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK)
      g_error ("Failed to link decoder to sink");
  }
}

int main(int argc, char *argv[])
{
  GstElement *pipeline, *source, *decoder, *encoder, *payloader, *rtsp_sink;
  GstCaps *caps;
  GstRTSPServer *server;
  GstRTSPMountPoints *mounts;
  GstRTSPMediaFactory *factory;

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

  // Create the pipeline
  pipeline = gst_pipeline_new ("rtsp-pipeline");

  // Create the source element
  source = gst_element_factory_make ("v4l2src", "camera-source");
  g_object_set (G_OBJECT (source), "device", "/dev/video0", NULL);
  g_object_set (G_OBJECT (source), "num-buffers", 300, NULL);
  g_object_set (G_OBJECT (source), "framerate", GST_FRAC_CONST (SOURCE_FPS_N, SOURCE_FPS_D), NULL);
  g_object_set (G_OBJECT (source), "width", SOURCE_WIDTH, NULL);
  g_object_set (G_OBJECT (source), "height", SOURCE_HEIGHT, NULL);

  // Create the decoder element
  decoder = gst_element_factory_make ("decodebin", "decoder");
  g_signal_connect (decoder, "pad-added", G_CALLBACK (cb_newpad), source);

  // Create the H.264 encoder element
  encoder = gst_element_factory_make ("nvv4l2h264enc", "encoder");
  g_object_set (G_OBJECT (encoder), "bitrate", 1000000, NULL);
  g_object_set (G_OBJECT (encoder), "preset-level", 1, NULL);

  // Create the RTP payloader element
  payloader = gst_element_factory_make ("rtph264pay", "payloader");
  g_object_set (