Replace av_dlog with normal av_log at trace level

This applies to every library where performance is not critical.

libavformat/rtmpproto.c

@@ -2310,7 +2310,7 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
 
     switch (pkt->type) {
     case RTMP_PT_BYTES_READ:
-        av_dlog(s, "received bytes read report\n");
+        av_log(s, AV_LOG_TRACE, "received bytes read report\n");
         break;
     case RTMP_PT_CHUNK_SIZE:
         if ((ret = handle_chunk_size(s, pkt)) < 0)