mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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76 lines
No EOL
2.3 KiB
C
76 lines
No EOL
2.3 KiB
C
#include <gst/gst.h>
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int main(int argc, char *argv[]) {
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GstElement *pipeline, *source, *sink;
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GstBus *bus;
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GstMessage *msg;
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GstStateChangeReturn ret;
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/* Initialize GStreamer */
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gst_init (&argc, &argv);
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/* Create the elements */
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source = gst_element_factory_make ("videotestsrc", "source");
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sink = gst_element_factory_make ("autovideosink", "sink");
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/* Create the empty pipeline */
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pipeline = gst_pipeline_new ("test-pipeline");
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if (!pipeline || !source || !sink) {
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g_printerr ("Not all elements could be created.\n");
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return -1;
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}
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/* Build the pipeline */
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gst_bin_add_many (GST_BIN (pipeline), source, sink, NULL);
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if (gst_element_link (source, sink) != TRUE) {
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g_printerr ("Elements could not be linked.\n");
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gst_object_unref (pipeline);
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return -1;
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}
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/* Modify the source's properties */
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g_object_set (source, "pattern", 0, NULL);
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/* Start playing */
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ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE) {
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g_printerr ("Unable to set the pipeline to the playing state.\n");
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gst_object_unref (pipeline);
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return -1;
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}
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/* Wait until error or EOS */
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bus = gst_element_get_bus (pipeline);
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msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
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/* Parse message */
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if (msg != NULL) {
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GError *err;
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gchar *debug_info;
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switch (GST_MESSAGE_TYPE (msg)) {
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case GST_MESSAGE_ERROR:
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gst_message_parse_error (msg, &err, &debug_info);
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g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message);
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g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
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g_clear_error (&err);
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g_free (debug_info);
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break;
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case GST_MESSAGE_EOS:
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g_print ("End-Of-Stream reached.\n");
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break;
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default:
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/* We should not reach here because we only asked for ERRORs and EOS */
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g_printerr ("Unexpected message received.\n");
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break;
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}
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gst_message_unref (msg);
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}
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/* Free resources */
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gst_object_unref (bus);
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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return 0;
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} |