Make ffmpeg work with x264 r592

Originally committed as revision 6711 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -1889,7 +1889,7 @@ typedef struct AVCodecContext {
      * - encoding: set by user.
      * - decoding: unused
      */
-    int crf;
+    float crf;
 
     /**
      * constant quantization parameter rate control method

libavcodec/utils.c

@@ -684,7 +684,7 @@ static const AVOption options[]={
 {"mepc", "motion estimation bitrate penalty compensation (1.0 = 256)", OFFSET(me_penalty_compensation), FF_OPT_TYPE_INT, 256, INT_MIN, INT_MAX, V|E},
 {"bidir_refine", NULL, OFFSET(bidir_refine), FF_OPT_TYPE_INT, DEFAULT, 0, 4, V|E},
 {"brd_scale", NULL, OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},
-{"crf", NULL, OFFSET(crf), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
+{"crf", NULL, OFFSET(crf), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 51, V|E},
 {"cqp", NULL, OFFSET(cqp), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, V|E},
 {"keyint_min", NULL, OFFSET(keyint_min), FF_OPT_TYPE_INT, 25, INT_MIN, INT_MAX, V|E},
 {"refs", NULL, OFFSET(refs), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E},

libavcodec/x264.c

@@ -146,7 +146,7 @@ X264_init(AVCodecContext *avctx)
     else{
         if(avctx->crf){
             x4->params.rc.i_rc_method = X264_RC_CRF;
-            x4->params.rc.i_rf_constant = avctx->crf;
+            x4->params.rc.f_rf_constant = avctx->crf;
         }else if(avctx->cqp > -1){
             x4->params.rc.i_rc_method = X264_RC_CQP;
             x4->params.rc.i_qp_constant = avctx->cqp;