[x265] [PATCH] rest: document --min-crf

[gopu at multicorewareinc.com]

# HG changeset patch
# User Gopu Govindaswamy
# Date 1399525769 -19800
#      Thu May 08 10:39:29 2014 +0530
# Node ID 4301ce670aed4b9095797a85f9996cf8db6e1789
# Parent  7a3657ff29e24b7832002b76b3f9096736d20a36
rest: document --min-crf

diff -r 7a3657ff29e2 -r 4301ce670aed doc/reST/cli.rst
--- a/doc/reST/cli.rst	Thu May 08 10:10:53 2014 +0530
+++ b/doc/reST/cli.rst	Thu May 08 10:39:29 2014 +0530
@@ -522,6 +522,13 @@
 	any given frame (ensuring a max QP).  This is dangerous when CRF is
 	used in combination with VBV as it may result in buffer underruns.
 	Default disabled
+        
+.. option:: --min-crf <0..51.0>
+
+        Specify an lower limit to the rate factor which may be assigned to
+        any given frame (ensuring a min QP).  This is dangerous when CRF is
+        used in combination with VBV as it may result in buffer underruns.
+        Default disabled
 
 .. option:: --vbv-bufsize <integer>