user setable quantizer bias

Originally committed as revision 1701 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/utils.c

@@ -244,6 +244,9 @@ void avcodec_get_context_defaults(AVCodecContext *s){
     s->release_buffer= avcodec_default_release_buffer;
     s->get_format= avcodec_default_get_format;
     s->me_subpel_quality=8;
+    
+    s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
+    s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
 }
 
 /**