add version

@@ -274,6 +274,7 @@ void load_codec_param()
 int main(int argc, char * argv[])
 {
 	if (argc < 2) {
+		printf("   merge_av 1.0.0\n");
 		printf("   run ffmpeg to merge audio and video files according to the record info file,\nusage:");
 		printf("\n   %s record_info_filename [-p]", argv[0]);
 		printf("\n   -p :only print the command,don't run ffmpeg\n");

@@ -81,6 +81,7 @@
   <ItemGroup>
     <ClCompile Include="merge_av.cpp">
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">NotUsing</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">NotUsing</PrecompiledHeader>
     </ClCompile>
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />