diff --git a/src_main/io/pibinarylog.cpp b/src_main/io/pibinarylog.cpp
index 61318375..c49b1d2a 100644
--- a/src_main/io/pibinarylog.cpp
+++ b/src_main/io/pibinarylog.cpp
@@ -87,8 +87,10 @@ bool PIBinaryLog::openDevice() {
 		if (ld.isExists()) {
 			PIVector<PIFile::FileInfo> es = ld.allEntries();
 			piForeachC(PIFile::FileInfo &i, es) {
-				if (i.extension() == "binlog" && i.isFile())
+				if (i.extension() == "binlog" && i.isFile() && i.baseName().startsWith(filePrefix())) {
 					setPath(i.path);
+					piBreak;
+				}
 			}
 		}
 	}
@@ -120,7 +122,7 @@ bool PIBinaryLog::openDevice() {
 			fileEnd();
 		}
 		play_time = 0;
-		if (!rapidStart()) is_started = true;
+		if (!rapid_start) is_started = true;
 	}
 	startlogtime = PISystemTime::current();
 	pause_time = PISystemTime();
@@ -531,6 +533,30 @@ PIBinaryLog::BinLogInfo PIBinaryLog::getLogInfo(const PIString & path) {
 }
 
 
+bool PIBinaryLog::cutBinLog(const PIBinaryLog::BinLogInfo & src, const PIString & dst, int from, int to) {
+	PIBinaryLog slog;
+	if (!slog.open(src.path, PIIODevice::ReadOnly)) return false;
+	PIVector<int> ids = src.records.keys();
+	slog.seekTo(from);
+	PIBinaryLog dlog;
+	dlog.createNewFile(dst);
+	bool first = true;
+	BinLogRecord br;
+	PISystemTime st;
+	while (!slog.isEnd() && ((slog.pos() <= to) || to < 0)) {
+		br = slog.readRecord();
+		if (first) {
+			st = br.timestamp;
+			first = false;
+		}
+		if (ids.contains(br.id)) {
+			dlog.writeBinLog_raw(br.id, br.timestamp - st, br.data);
+		}
+	}
+	return true;
+}
+
+
 PIString PIBinaryLog::constructFullPathDevice() const {
 	PIString ret;
 	ret << logDir() << ":" << filePrefix() << ":" << defaultID() << ":";
diff --git a/src_main/io/pibinarylog.h b/src_main/io/pibinarylog.h
index 4c474df5..1f45e6c9 100644
--- a/src_main/io/pibinarylog.h
+++ b/src_main/io/pibinarylog.h
@@ -266,6 +266,7 @@ public:
 
 	//! Get binlog info and statistic
 	static BinLogInfo getLogInfo(const PIString & path);
+	static bool cutBinLog(const BinLogInfo & src, const PIString & dst, int from, int to);
 
 protected:
 	PIString fullPathPrefix() const {return PIStringAscii("binlog");}