Index: libmpcodecs/ve_lavc.c
===================================================================
--- libmpcodecs/ve_lavc.c	(revision 20571)
+++ libmpcodecs/ve_lavc.c	(working copy)
@@ -52,6 +52,8 @@
 static int lavc_param_mb_qmax = 31;
 static float lavc_param_lmin = 2;
 static float lavc_param_lmax = 31;
+static float lavc_param_mb_lmin = 2;
+static float lavc_param_mb_lmax = 31;
 static int lavc_param_vqdiff = 3;
 static float lavc_param_vqcompress = 0.5;
 static float lavc_param_vqblur = 0.5;
@@ -175,6 +177,8 @@
 	{"mbqmax", &lavc_param_mb_qmax, CONF_TYPE_INT, CONF_RANGE, 1, 31, NULL},
 	{"lmin", &lavc_param_lmin, CONF_TYPE_FLOAT, CONF_RANGE, 0.01, 255.0, NULL},
 	{"lmax", &lavc_param_lmax, CONF_TYPE_FLOAT, CONF_RANGE, 0.01, 255.0, NULL},
+	{"mblmin", &lavc_param_mb_lmin, CONF_TYPE_FLOAT, CONF_RANGE, 0.01, 255.0, NULL},
+	{"mblmax", &lavc_param_mb_lmax, CONF_TYPE_FLOAT, CONF_RANGE, 0.01, 255.0, NULL},
 	{"vqdiff", &lavc_param_vqdiff, CONF_TYPE_INT, CONF_RANGE, 1, 31, NULL},
 	{"vqcomp", &lavc_param_vqcompress, CONF_TYPE_FLOAT, CONF_RANGE, 0.0, 1.0, NULL},
 	{"vqblur", &lavc_param_vqblur, CONF_TYPE_FLOAT, CONF_RANGE, 0.0, 1.0, NULL},
@@ -341,6 +345,8 @@
     lavc_venc_context->mb_qmax= lavc_param_mb_qmax;
     lavc_venc_context->lmin= (int)(FF_QP2LAMBDA * lavc_param_lmin + 0.5);
     lavc_venc_context->lmax= (int)(FF_QP2LAMBDA * lavc_param_lmax + 0.5);
+    lavc_venc_context->mb_lmin= (int)(FF_QP2LAMBDA * lavc_param_mb_lmin + 0.5);
+    lavc_venc_context->mb_lmax= (int)(FF_QP2LAMBDA * lavc_param_mb_lmax + 0.5);
     lavc_venc_context->max_qdiff= lavc_param_vqdiff;
     lavc_venc_context->qcompress= lavc_param_vqcompress;
     lavc_venc_context->qblur= lavc_param_vqblur;
Index: DOCS/man/en/mplayer.1
===================================================================
--- DOCS/man/en/mplayer.1	(revision 20571)
+++ DOCS/man/en/mplayer.1	(working copy)
@@ -7126,8 +7126,15 @@
 .
 .TP
 .B lmin=<0.01\-255.0>
-Minimum Lagrange multiplier for ratecontrol, you probably want it to be
-equal to or lower than vqmin (default: 2.0).
+Minimum frame-level Lagrange multiplier for ratecontrol (default: 2.0).
+Lavc will rarely use quantizers below the value of lmin.
+Lowering lmin will make lavc more likely to choose lower quantizers for
+some frames, but not lower than the value of vqmin.
+Likewise, raising lmin will make lavc less likely to choose low
+quantizers, even if vqmin would have allowed them.
+You probably want to set lmin approximately equal to vqmin.
+When adaptive quantization is in use, changing lmin/lmax may have less
+of an effect; see mblmin/mblmax.
 .RE
 .
 .TP
@@ -7136,6 +7143,20 @@
 .RE
 .
 .TP
+.B mblmin=<0.01\-255.0>
+Minimum macroblock-level Lagrange multiplier for ratecontrol
+(default:2.0).
+This parameter affects adaptive quantization options like qprd,
+lumi_mask, etc..
+.RE
+.
+.TP
+.B mblmax=<0.01\-255.0>
+Maximum macroblock-level Lagrange multiplier for ratecontrol
+(default: 31.0).
+.RE
+.
+.TP
 .B vqscale=<0\-31>
 Constant quantizer /\: constant quality encoding (selects fixed quantizer mode).
 A lower value means better quality but larger files (default: 0).