fprintf(stdout, "Using pipeline: %s\n", pipeline_str);
GstElement *pipeline = gst_parse_launch(pipeline_str, &error);
if (error || !pipeline) {
fprintf(stderr, "gstreamer pipeline construction failed!\n");
fprintf(stdout, "Using pipeline: %s\n", pipeline_str);
GstElement *pipeline = gst_parse_launch(pipeline_str, &error);
if (error || !pipeline) {
fprintf(stderr, "gstreamer pipeline construction failed!\n");