jeston,拉流,使用硬件加速nvdec/nvenc
#include <gst/gst.h>
typedef struct _CustomData {
GstElement *pipeline;
GstElement *source;
GstElement *depay;
GstElement *parse;
GstElement *avdec;
GstElement *convert;
GstElement *encoder;
GstElement *sink;
} CustomData;
static void pad_added_handler (GstElement *src, GstPad *pad, CustomData *data);
int main(int argc, char *argv[]) {
CustomData data;
GstBus *bus;
GstMessage *msg;
GstStateChangeReturn ret;
gboolean terminate = FALSE;
gst_init (&argc, &argv);
data.source = gst_element_factory_make ("rtspsrc", "source");
g_object_set (G_OBJECT (data.source), "latency", 2000, NULL);
data.depay = gst_element_factory_make ("rtph264depay", "depay");
data.parse = gst_element_factory_make ("h264parse", "parse");
data.avdec = gst_element_factory_make ("nvv4l2decoder", "decoder");
data.convert = gst_element_factory_make ("nvvidconv", "convert");
data.encoder = gst_element_factory_make("nvv4l2h264enc", "encoder");
data.sink = gst_element_factory_make ("multifilesink", "sink");
g_object_set (data.source, "location", "rtsp://deepcong:666@192.168.100.52:5/0", NULL);
g_object_set(G_OBJECT(data.sink), "location", "test666.jpg", NULL);
g_signal_connect (data.source, "pad-added", G_CALLBACK (pad_added_handler), &data);
data.pipeline = gst_pipeline_new ("test-pipeline");
if (!data.pipeline || !data.source || !data.convert || !data.sink) {
g_printerr ("Not all elements could be created.\n");
return -1;
}
gst_bin_add_many (GST_BIN (data.pipeline), data.source, data.depay, data.parse, data.avdec, data.convert, data.encoder,data.sink, NULL);
if (!gst_element_link_many (data.depay, data.parse, data.avdec, data.convert,data.encoder, data.sink, NULL)) {
g_printerr ("Elements could not be linked.\n");
gst_object_unref (data.pipeline);
return -1;
}
ret = gst_element_set_state (data.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 (data.pipeline);
return -1;
}
bus = gst_element_get_bus (data.pipeline);
do {
msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE,
GST_MESSAGE_STATE_CHANGED | GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
if (msg != NULL) {
GError *err;
gchar *debug_info;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ERROR:
gst_message_parse_error (msg, &err, &debug_info);
g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message);
g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
g_clear_error (&err);
g_free (debug_info);
terminate = TRUE;
break;
case GST_MESSAGE_EOS:
g_print ("End-Of-Stream reached.\n");
terminate = TRUE;
break;
case GST_MESSAGE_STATE_CHANGED:
if (GST_MESSAGE_SRC (msg) == GST_OBJECT (data.pipeline)) {
GstState old_state, new_state, pending_state;
gst_message_parse_state_changed (msg, &old_state, &new_state, &pending_state);
g_print ("Pipeline state changed from %s to %s:\n",
gst_element_state_get_name (old_state), gst_element_state_get_name (new_state));
}
break;
default:
g_printerr ("Unexpected message received.\n");
break;
}
gst_message_unref (msg);
}
} while (!terminate);
gst_object_unref (bus);
gst_element_set_state (data.pipeline, GST_STATE_NULL);
gst_object_unref (data.pipeline);
return 0;
}
static void pad_added_handler (GstElement *src, GstPad *new_pad, CustomData *data) {
GstPad *sink_pad = gst_element_get_static_pad (data->depay, "sink");
GstPadLinkReturn ret;
GstCaps *new_pad_caps = NULL;
GstStructure *new_pad_struct = NULL;
const gchar *new_pad_type = NULL;
g_print ("Received new pad '%s' from '%s':\n", GST_PAD_NAME (new_pad), GST_ELEMENT_NAME (src));
if (gst_pad_is_linked (sink_pad)) {
g_print ("We are already linked. Ignoring.\n");
goto exit;
}
new_pad_caps = gst_pad_get_current_caps (new_pad);
new_pad_struct = gst_caps_get_structure (new_pad_caps, 0);
new_pad_type = gst_structure_get_name (new_pad_struct);
ret = gst_pad_link (new_pad, sink_pad);
if (GST_PAD_LINK_FAILED (ret)) {
g_print ("Type is '%s' but link failed.\n", new_pad_type);
} else {
g_print ("Link succeeded (type '%s').\n", new_pad_type);
}
exit:
if (new_pad_caps != NULL)
gst_caps_unref (new_pad_caps);
gst_object_unref (sink_pad);
}
编译:
gcc demo.c -o demo `pkg-config --cflags --libs gstreamer-1.0`
运行:
./demo
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