I’m trying to get a rtsp stream and sending it away with a rtsp-server. Because of the rtsp-server library I’m now using the launch function “gst_rtsp_media_factory_set_launch()” to make a working pipeline. This works fine with the following launch command:
gst_rtsp_media_factory_set_launch( factory, "( rtspsrc location=rtsp://user:passw@172.16.100.120/axis-media/media.am ! rtph264depay ! rtph264pay name=pay0 pt=96 )" );
This does NOT have a delay. But as soon as I implement nvidia accelerated gstreamer elements, it gets a big delay. I wanted to use those elements, because I want to crop the incomming stream. I call the following launch command:
gst_rtsp_media_factory_set_launch( factory, "( rtspsrc location=rtsp://user:passw@172.16.100.120/axis-media/media.am ! rtph264depay ! h264parse ! nvv4l2decoder num-extra-surfaces=23 ! nvvidconv left=0 right=1200 top=0 bottom=960 ! x264enc ! rtph264pay name=pay0 pt=96 )" );
When its running with a debugger it continuously writes:
WARN v4l2bufferpool gstv4l2bufferpool.c:1482:gst_v4l2_buffer_pool_dqbuf:<nvv4l2decoder1:pool:sink> v4l2 provided buffer that is too big for the memory it was writing into. v4l2 claims 1008 bytes used but memory is only 0B. This is probably a driver bug.
I also notice that he CPU load is almost 100% of all the CPU’s.
Does someone know what’s the cause of this delay and how to solve this.
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My setup is a
Jetson nano.
jetpack 4.4…
uname -r shows 4.9.140-tegra
gstreamer version 1.14.5
gst-rtsp-server
My code is directly from a example of the gst-rtsp-server library with only the launch function adjusted. But it looks like:
int main(int argc, char** argv)
{
GMainLoop *loop;
GstRTSPServer *server;
GstRTSPMountPoints *mounts;
GstRTSPMediaFactory *factory;
gchar *launch_str;
// GstElement *testelement;
// GstRTSPUrl *out_url_rtsp;
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* create a server instance */
server = gst_rtsp_server_new ();
/* get the mount points for this server, every server has a default object
* that be used to map uri mount points to media factories */
mounts = gst_rtsp_server_get_mount_points (server);
/* make a media factory for a test stream. The default media factory can use
* gst-launch syntax to create pipelines.
* any launch line works as long as it contains elements named pay%d. Each
* element with pay%d names will be a stream */
factory = gst_rtsp_media_factory_new ();
launch_str = g_strdup( "( rtspsrc location=rtsp://root:RET_CV_7593@172.16.100.120/axis-media/media.amp latency=100 !\
rtph264depay ! h264parse ! nvv4l2decoder num-extra-surfaces=23 ! \
nvvidconv left=0 right=1200 top=0 bottom=960 ! \
x264enc ! rtph264pay name=pay0 pt=96 )" );
printf ("lauch_string: %s\n", launch_str);
gst_rtsp_media_factory_set_launch (factory, launch_str );
// "( rtspsrc location=rtsp://user:passw@172.16.100.120/axis-media/media.amp latency=100 ! rtph264depay ! rtph264pay name=pay0 pt=96 )");
gst_rtsp_media_factory_set_shared (factory, TRUE);
/* attach the test factory to the /test url */
gst_rtsp_mount_points_add_factory (mounts, "/test", factory);
// gst_rtsp_url_parse("rtsp://127.0.0.1:8554/test", &out_url_rtsp);
// testelement = gst_rtsp_media_factory_create_element(factory, out_url_rtsp);
// gst_rtsp_url_free(out_url_rtsp);
// gst_element_set_state(testelement, GST_STATE_PLAYING);
/* don't need the ref to the mapper anymore */
g_object_unref (mounts);
/* attach the server to the default maincontext */
gst_rtsp_server_attach (server, NULL);
/* start serving */
g_print ("stream ready at rtsp://127.0.0.1:8554/test\n");
g_main_loop_run (loop);
return 0;
}