rtphdrext-rfc6464: Put max level if the audio is beyond it

Otherwise, it just fails to add the extension, which makes no
sense. And our level element produces levels higher than 127 in some
cases.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1058>

gst/rtpmanager/gstrtphdrext-rfc6464.c

@@ -219,6 +219,7 @@ gst_rtp_header_extension_rfc6464_write (GstRTPHeaderExtension * ext,
     GstBuffer * output, guint8 * data, gsize size)
 {
   GstAudioLevelMeta *meta;
+  guint level;
 
   g_return_val_if_fail (size >=
       gst_rtp_header_extension_rfc6464_get_max_size (ext, NULL), -1);
@@ -231,10 +232,11 @@ gst_rtp_header_extension_rfc6464_write (GstRTPHeaderExtension * ext,
     return 0;
   }
 
-  if (meta->level > 127) {
-    GST_WARNING_OBJECT (ext, "level from meta is higher than 127: %d",
+  level = meta->level;
+  if (level > 127) {
+    GST_LOG_OBJECT (ext, "level from meta is higher than 127: %d, cropping",
         meta->level);
-    return -1;
+    level = 127;
   }
 
   GST_LOG_OBJECT (ext, "writing ext (level: %d voice: %d)", meta->level,