Index: libmpdemux/demux_mkv.c
===================================================================
--- libmpdemux/demux_mkv.c	(revision 25290)
+++ libmpdemux/demux_mkv.c	(working copy)
@@ -320,6 +320,7 @@
       y = av_clip_uint8( 0.1494  * r + 0.6061 * g + 0.2445 * b);
       u = av_clip_uint8( 0.6066  * r - 0.4322 * g - 0.1744 * b + 128);
       v = av_clip_uint8(-0.08435 * r - 0.3422 * g + 0.4266 * b + 128);
+      y = y * 219 / 255 + 16;
       sh->palette[i] = y << 16 | u << 8 | v;
       start += 6;
       while ((*start == ',') || isspace(*start))
Index: vobsub.c
===================================================================
--- vobsub.c	(revision 25290)
+++ vobsub.c	(working copy)
@@ -825,6 +825,7 @@
 	y = av_clip_uint8( 0.1494  * r + 0.6061 * g + 0.2445 * b);
 	u = av_clip_uint8( 0.6066  * r - 0.4322 * g - 0.1744 * b + 128);
 	v = av_clip_uint8(-0.08435 * r - 0.3422 * g + 0.4266 * b + 128);
+	y = y * 219 / 255 + 16;
 	vob->palette[n++] = y << 16 | u << 8 | v;
 	if (n == 16)
 	    break;