Index: libmpdemux/demux_mpg.c
===================================================================
--- libmpdemux/demux_mpg.c	£¨ÐÞ¶©°æ 22356£©
+++ libmpdemux/demux_mpg.c	£¨¹¤×÷¿½±´£©
@@ -892,11 +893,7 @@
 	    if(newpos<demuxer->movi_start) newpos=demuxer->movi_start;
 	}
 
-#ifdef _LARGEFILE_SOURCE
-        newpos&=~((long long)STREAM_BUFFER_SIZE-1);  /* sector boundary */
-#else
-        newpos&=~(STREAM_BUFFER_SIZE-1);  /* sector boundary */
-#endif
+        newpos&=~((off_t)STREAM_BUFFER_SIZE-1);  /* sector boundary */
         stream_seek(demuxer->stream,newpos);
 
         // re-sync video: