use first name

@@ -813,7 +813,7 @@ int get_output_file_name(int i, const char * file_prefix, char * outputfile){
 	return 0;
 }
 
-bool is_need_output(int nOutPutFile, vector<media_info> & cur_processing, char * outputfile)
+bool is_need_output(int nOutPutFile, vector<media_info> & cur_processing, const char * first_file, char * outputfile)
 {
 	if (sorted_infos.size()) {
 		int lastEnd = cur_processing[cur_processing.size() - 1].type_time;
@@ -823,7 +823,7 @@ bool is_need_output(int nOutPutFile, vector<media_info> & cur_processing, char *
 		}
 	}
 
-	get_output_file_name(nOutPutFile, cur_processing[0].name.c_str(), outputfile);
+	get_output_file_name(nOutPutFile, first_file, outputfile);
 	return true;
 }
 
@@ -839,9 +839,11 @@ int process_va_files()
 {
 	char outputfile[1024];
 	vector<media_info> cur_processing;
+	
 	int nOutPutFile = 0;
 	float start_time;
 	bool is_start = true;
+	string start_file;
 
 	while (sorted_infos.size())
 	{
@@ -870,9 +872,10 @@ int process_va_files()
 		//if the duration between the processed end and the start of not processed is large than 200 ms, reopen a new file
 		if (is_start){
 			start_time = cur_processing[0].start_time;
+			start_file = cur_processing[0].name;
 			is_start = false;
 		}
-		if (is_need_output(nOutPutFile, cur_processing, outputfile)){
+		if (is_need_output(nOutPutFile, cur_processing, start_file.c_str(), outputfile)){
 			nOutPutFile++;
 			concate_files_and_adjust_timecode(outputfile);
 			save_out_info(start_time, outputfile);