How do i communicate with the encoder in gstreamer - c

Question

I've just started learning gstreamer and I'm having some troubles communicating with the x264 encoder.
I'm trying to stream a my screen from one device to another using the x264 encoder. However my network is pretty unstable so sometimes i miss an IDR frame. This means basically no video for at least 2s until the next IDR-frame is received.
I'm trying to implement some way my device can ask gstreamer to generate an IDR-frame as soon as one is lost.
Here is a brief summary of the code so far:
#include <gst/gst.h>
int main(int argc, char* argv[])
{
GstElement* pipeline;
GstElement* videosource, * videoconverter, * videoencoder, * videosink;
GstBus* bus;
GstMessage* msg;
GstStateChangeReturn ret;
gst_init(&argc, &argv);
videosource = gst_element_factory_make("dxgdiscreencapsrc", "video_source");
videoconverter = gst_element_factory_make("autovideoconvert", "video_converter");
videoencoder = gst_element_factory_make("x264enc", "video_encoder");
videosink = gst_element_factory_make("udpsink", "video_sink");
// create the pipeline
pipeline = gst_pipeline_new("video_pipeline");
if (!pipeline || !videosource || !videoconverter, !videoencoder || !videosink) {
g_printerr("All elements could not be created");
gst_object_unref(pipeline);
return -1;
}
// build pipeline
gst_bin_add_many(GST_BIN(pipeline), videosource, videoconverter, videoencoder, videosink,
NULL);
// link elements
if (gst_element_link_many(videosource, videoconverter, videoencoder, videosink, NULL) != TRUE) {
g_printerr("Elements could not be linked.\n");
gst_object_unref(pipeline);
return -1;
}
// modify properties
g_object_set(videoencoder,
"threads", 8,
"quantizer", 21, // quantizer must be set to where bitrate is around desired value
"bitrate", 4800, // kbit/s
"vbv-buf-capacity", 5000, // the more it is the higher the bitrate fluctuations. set to around bitrate or bitrate/framerate for more control
"tune", 0x4, // zerolatency
"speed-preset", 2, // superfast
"key-int-max", 120, // ideally twice the framerate
NULL);
g_object_set(videosink,
"host", "REDACTED",
"port", 1234,
NULL);
// start playing
ret = gst_element_set_state(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(pipeline);
return -1;
}
... read bus and cleanup afterwards (same as those in gstreamer tutorials)
How do i force the next frame to be an IDR-frame? Is there any way to directly access the underlying encoder parameters to set the X264_TYPE_IDR flag?
Thanks for your time!