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     ANSI C requires that a file positioning function intervene
     between output and input, unless an input operation encounters
     end-of-file.

Here's a patch which fix xvid 2 passes encoding, which was broken at
least on FreeBSD :

--- xvid_vbr.c	18 Sep 2002 01:32:32 -0000	1.2
+++ xvid_vbr.c	2 Nov 2002 11:13:03 -0000
@@ -593,6 +593,7 @@
 {
 
 	int c, i;
+	long pos;
 	vbr_control_t *state = sstate;
 
 	if(state->pass1_file == NULL)
@@ -601,7 +602,7 @@
 	/* Goto to the file beginning */
 	fseek(state->pass1_file, 0, SEEK_SET);
 
-	/* Skip the version line  and the empty line */
+	/* Skip the version line and the empty line */
 	c = i = 0;
 	do {
 		c = fgetc(state->pass1_file);
@@ -610,6 +611,8 @@
 		if(c == '\n') i++;
 
 	}while(i < 2);
+	pos = ftell( state->pass1_file );
+	fseek( state->pass1_file, pos, SEEK_SET );
 
 	/* Overwrite the frame field - safe as we have written extra spaces */
 	fprintf(state->pass1_file, "# frames    : %.10d\n", state->nb_frames);


-- 
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