fix proto breaking change (#843)

generate.sh

@@ -7,11 +7,13 @@ PB=$REPO/protobuf
 
 export PATH=/opt/.protoc/bin:$PWD/.protoc/bin:$PATH
 
-REALPATH=${REALPATH:-$(if [[ "$OSTYPE" == "darwin"* ]]; then echo "grealpath"; else echo "realpath"; fi)}
-if ! command -v $REALPATH &> /dev/null; then
-  echo "$REALPATH command not found. Please install it and try again."
-  exit 1
-fi
+# In some systems like Mac OS 13.0.1, the realpath defaults to
+# the system installed one which does not support flags like
+# --relative-path. This results in the scripts erroring out.
+# The coreutils installed with Homebrew (as mentioned in README)
+# installs GNU realpath which could be available as "grealpath"
+# which actually works. Hence, the option to customize REALPATH
+REALPATH=${REALPATH:-realpath}
 
 GEN_PROFILE=${1:-go}
 

protobuf/video/sfu/models/models.proto

@@ -122,7 +122,7 @@ message PublishOption {
 }
 
 message Codec {
-  uint32 payload_type = 13;
+  uint32 payload_type = 16;
   string name = 10;
   uint32 clock_rate = 14;
   string encoding_parameters = 15;