diff -r 3ae60c8a15f2 -r b39beffcf05e hedgewars/uUtils.pas
--- a/hedgewars/uUtils.pas	Mon Aug 27 16:52:50 2012 -0400
+++ b/hedgewars/uUtils.pas	Tue Aug 28 20:30:57 2012 +0400
@@ -61,6 +61,7 @@
 function  CheckCJKFont(s: ansistring; font: THWFont): THWFont;
 
 procedure AddFileLog(s: shortstring);
+procedure AddFileLogRaw(s: pchar); cdecl;
 
 function  CheckNoTeamOrHH: boolean; inline;
 
@@ -81,6 +82,9 @@
 
 {$IFDEF DEBUGFILE}
 var f: textfile;
+{$IFDEF USE_VIDEO_RECORDING}
+    logMutex: TRTLCriticalSection; // mutex for debug file
+{$ENDIF}
 {$ENDIF}
 var CharArray: array[byte] of Char;
 
@@ -291,11 +295,31 @@
 begin
 s:= s;
 {$IFDEF DEBUGFILE}
+{$IFDEF USE_VIDEO_RECORDING}
+EnterCriticalSection(logMutex);
+{$ENDIF}
 writeln(f, inttostr(GameTicks)  + ': ' + s);
-flush(f)
+flush(f);
+{$IFDEF USE_VIDEO_RECORDING}
+LeaveCriticalSection(logMutex);
+{$ENDIF}
 {$ENDIF}
 end;
 
+procedure AddFileLogRaw(s: pchar); cdecl;
+begin
+s:= s;
+{$IFDEF DEBUGFILE}
+{$IFDEF USE_VIDEO_RECORDING}
+EnterCriticalSection(logMutex);
+{$ENDIF}
+write(f, s);
+flush(f);
+{$IFDEF USE_VIDEO_RECORDING}
+LeaveCriticalSection(logMutex);
+{$ENDIF}
+{$ENDIF}
+end;
 
 function CheckCJKFont(s: ansistring; font: THWFont): THWFont;
 var l, i : LongInt;
@@ -385,9 +409,17 @@
 begin
 {$IFDEF DEBUGFILE}
     if isGame then
-        logfileBase:= 'game'
+    begin
+        if GameType = gmtRecord then
+            logfileBase:= 'rec'
+        else
+            logfileBase:= 'game';
+    end
     else
         logfileBase:= 'preview';
+{$IFDEF USE_VIDEO_RECORDING}
+    InitCriticalSection(logMutex);
+{$ENDIF}
 {$I-}
 {$IFDEF MOBILE}
     {$IFDEF IPHONEOS} Assign(f,'../Documents/hw-' + logfileBase + '.log'); {$ENDIF}
@@ -424,6 +456,9 @@
     writeln(f, 'halt at ' + inttostr(GameTicks) + ' ticks. TurnTimeLeft = ' + inttostr(TurnTimeLeft));
     flush(f);
     close(f);
+{$IFDEF USE_VIDEO_RECORDING}
+    DoneCriticalSection(logMutex);
+{$ENDIF}
 {$ENDIF}
 end;