normalize error message (#2160)

internal/core/hls_muxer.go

@@ -272,7 +272,7 @@ func (m *hlsMuxer) runInner(innerCtx context.Context, innerReady chan struct{})
 
 	if medias == nil {
 		return fmt.Errorf(
-			"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG4-Audio")
+			"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG-4 Audio")
 	}
 
 	var muxerDirectory string

internal/core/srt_conn.go

@@ -742,7 +742,7 @@ func (c *srtConn) runRead(req srtNewConnReq, pathName string, user string, pass
 
 	if len(tracks) == 0 {
 		return true, fmt.Errorf(
-			"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG4-Audio")
+			"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG-4 Audio")
 	}
 
 	c.Log(logger.Info, "is reading from path '%s', %s",