avcodec/qsvenc: Set MaxKpbs to rc_max_rate for CBR and VBR (bitrate is equal to rc_max_rate for CBR)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/qsvenc.c

@@ -121,7 +121,7 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
     case MFX_RATECONTROL_VBR:
         q->param.mfx.InitialDelayInKB = avctx->rc_initial_buffer_occupancy / 1000;
         q->param.mfx.TargetKbps       = avctx->bit_rate / 1000;
-        q->param.mfx.MaxKbps          = avctx->bit_rate / 1000;
+        q->param.mfx.MaxKbps          = avctx->rc_max_rate / 1000;
         break;
     case MFX_RATECONTROL_CQP:
         quant = avctx->global_quality / FF_QP2LAMBDA;