Reduce log spam

This removes frequent output (typically 3 times in a row):
"RED codec red is missing an associated payload type."

Bug: none
Change-Id: Ie7e0f344209cb01f9730960a6fec9d5987eaadfd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/301720
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39885}

pc/media_session.cc

diff --git a/pc/media_session.cc b/pc/media_session.cc
index 23a2ad1..274d7ce 100644
--- a/pc/media_session.cc
+++ b/pc/media_session.cc
@@ -948,8 +948,10 @@
   std::string fmtp;
   if (!red_codec.GetParam(kCodecParamNotInNameValueFormat, &fmtp)) {
     // Normal for video/RED.
-    RTC_LOG(LS_WARNING) << "RED codec " << red_codec.name
-                        << " is missing an associated payload type.";
+    if constexpr (std::is_same_v<C, AudioCodec>) {
+      RTC_LOG(LS_WARNING) << "RED codec " << red_codec.name
+                          << " is missing an associated payload type.";
+    }
     return nullptr;
   }