webrtcbin: Clear errors from finding codec preferences before the next iteration

The media is just skipped and the error is not propagated to the caller,
so keeping it around here would cause assertions a bit later when trying
to set a new error over the old one.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1291>

diff --git a/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c b/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c
index d25f95a..02ebc91 100644 (file)
--- a/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c
+++ b/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c
@@ -3966,10 +3966,16 @@ _create_answer_task (GstWebRTCBin * webrtc, const GstStructure * options,
 
     if (0) {
     rejected:
-      GST_INFO_OBJECT (webrtc, "media %u rejected", i);
+      if (error && *error)
+        GST_INFO_OBJECT (webrtc, "media %u rejected: %s", i, (*error)->message);
+      else
+        GST_INFO_OBJECT (webrtc, "media %u rejected", i);
       gst_sdp_media_free (media);
       gst_sdp_media_copy (offer_media, &media);
       gst_sdp_media_set_port_info (media, 0, 0);
+      /* Clear error here as it is not propagated to the caller and the media
+       * is just skipped, i.e. more iterations are going to happen. */
+      g_clear_error (error);
     }
     gst_sdp_message_add_media (ret, media);
     gst_sdp_media_free (media);