c++ - Gstreamer调试管道C++

我正在尝试将gstreamer bash脚本转码为c ++代码，但是我无法将调试日志保存到文件中

这是我的代码

int main(int argc, char *argv[])
{
      YoctoLinuxSystem* hola;
      //hola->YoctoLinuxSystem();



	  CustomData DataTest, DataDvi;
	  GstBus *bus;
	  GstMessage *msg;
	  GstStateChangeReturn ret;
	  GMainLoop *loop;



	  //vector<string> lines = YoctoLinuxSystem::getCmdOutputAsLines("./scripts/get_system_temps.sh");


     gst_init (&argc, &argv);

	 loop = g_main_loop_new (NULL, FALSE);

	 /******************************/
	 /****AJUSTES GSTREAMER TEST****/
	 /******************************/

	 DataTest.source = gst_element_factory_make ("videotestsrc", "source");
	 DataTest.capsfilter = gst_element_factory_make ("capsfilter","caps");
	 DataTest.sink = gst_element_factory_make ("imxipuvideosink", "sink");


	 DataTest.pipeline = gst_pipeline_new ("test-pipeline");

	   if (!DataTest.pipeline || !DataTest.source || !DataTest.capsfilter || !DataTest.sink) {
	    g_printerr ("Not all elements could be created.\n");
	    return -1;
	  }

	  /* Modify the source's properties */
	  g_object_set (DataTest.source, "pattern", 0, NULL);
	  g_object_set(DataTest.capsfilter, "caps", gst_caps_new_simple("video/x-raw", "framerate", GST_TYPE_FRACTION, 25, 1,"width", G_TYPE_INT, 1920, "height", G_TYPE_INT, 1080, "format", G_TYPE_STRING, "RGB", NULL), NULL);


	  /* Build the pipeline */
	  gst_bin_add_many (GST_BIN (DataTest.pipeline), DataTest.source, DataTest.capsfilter, DataTest.sink, NULL);

	  if (gst_element_link (DataTest.source, DataTest.capsfilter) != TRUE) {
	    g_printerr ("Elements source-caps could not be linked.\n");
	    gst_object_unref (DataTest.pipeline);
	    return -1;
	  }

	  if (gst_element_link (DataTest.capsfilter, DataTest.sink) != TRUE) {
	    g_printerr ("Elements caps-sink could not be linked.\n");
	    gst_object_unref (DataTest.pipeline);
	    return -1;
	  }

	   gst_element_link_many (DataTest.source, DataTest.capsfilter, DataTest.sink, NULL);


	   /******************************/
	   /****AJUSTES GSTREAMER DVI****/
	   /******************************/
	   DataDvi.source = gst_element_factory_make ("v4l2src", "source");
	   DataDvi.sink = gst_element_factory_make ("imxipuvideosink", "sink");


	   DataDvi.pipeline = gst_pipeline_new ("test-pipeline");

	   if (!DataDvi.pipeline || !DataDvi.source || !DataDvi.sink) {
	   	    g_printerr ("Not all elements could be created.\n");
	   	    return -1;
	   }

	   	  /* Modify the source's properties */
	   g_object_set (DataDvi.source, "device", "/dev/video0", NULL);


	   	  /* Build the pipeline */
	   gst_bin_add_many (GST_BIN (DataDvi.pipeline), DataDvi.source, DataDvi.sink, NULL);


	   if (gst_element_link (DataDvi.source, DataDvi.sink) != TRUE) {
	   	    g_printerr ("Elements caps-sink could not be linked.\n");
	   	    gst_object_unref (DataDvi.pipeline);
	   	    return -1;
	   }

	   gst_element_link_many (DataDvi.source, DataDvi.sink, NULL);


	   GST_DEBUG=2;

	   ifstream fileread;
	  // fileread.open("/var/log/data.log");

	 while(1)
	 {
		 ifstream fileread("/var/log/data.log");

		 if (!fileread.good())
		 {
		  /* Start playing */
		  //g_print ("Now playing: \n");
		  gst_element_set_state (DataDvi.pipeline, GST_STATE_PAUSED);
		  ret = gst_element_set_state (DataTest.pipeline, GST_STATE_PLAYING);
		  if (ret == GST_STATE_CHANGE_FAILURE) {
			g_printerr ("Unable to set the pipeline to the playing state.\n");
			gst_object_unref (DataTest.pipeline);
			return -1;
		  }
		 }

		 else
		 {
			 gst_element_set_state (DataTest.pipeline, GST_STATE_PAUSED);
			 ret = gst_element_set_state (DataDvi.pipeline, GST_STATE_PLAYING);

           /*HERE I NEED TO KNOW THE DEBUG OF THE PIPELINE*/

			 if (ret == GST_STATE_CHANGE_FAILURE) {
			 	g_printerr ("Unable to set the pipeline to the playing state.\n");
			 	gst_object_unref (DataDvi.pipeline);
			 	return -1;
			 }
		 }
	 }

    g_print ("SALE\n");
  return 0;
 }

我正在使用gstreamer-1.0库，并且已经看到我需要使用GST_DEBUG_FILE，但是我不知道如何从c ++调用这些函数。

谢谢您的帮助！

最佳答案

GST_DEBUG_FILE是环境变量，因此与C ++无关。

您可以使用类似

export GST_DEBUG_FILE=~/gst.log

在运行您的应用程序之前。或在您的bash启动脚本中添加类似的内容。

关于c++ - Gstreamer调试管道C++，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/38767313/