use random UUIDs as media IDs (#163)

* remove Medias.Clone(), Media.Clone(), Format.Clone()

* server: use random UUIDs as media IDs

* client: use random UUIDs as media IDs

serverconn.go

@@ -14,6 +14,7 @@ import (
 	"github.com/aler9/gortsplib/v2/pkg/bytecounter"
 	"github.com/aler9/gortsplib/v2/pkg/conn"
 	"github.com/aler9/gortsplib/v2/pkg/liberrors"
+	"github.com/aler9/gortsplib/v2/pkg/media"
 	"github.com/aler9/gortsplib/v2/pkg/url"
 )
 
@@ -377,8 +378,17 @@ func (sc *ServerConn) handleRequest(req *base.Request) (*base.Response, error) {
 					}
 				}
 
+				mediasCopy := make(media.Medias, len(stream.medias))
+				for i, medi := range stream.medias {
+					mediasCopy[i] = &media.Media{
+						Type:    medi.Type,
+						Formats: medi.Formats,
+						Control: "mediaUUID=" + stream.streamMedias[medi].uuid.String(),
+					}
+				}
+
 				if stream != nil {
-					byts, _ := stream.Medias().CloneAndSetControls().Marshal(multicast).Marshal()
+					byts, _ := mediasCopy.Marshal(multicast).Marshal()
 					res.Body = byts
 				}
 			}