qsvenc: Value '0' is not a valid value for parameter GopOptFlag

The accepted values for GopOptFlag are MFX_GOP_CLOSED (1) and
MFX_GOP_STRICT (2).

Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>
Signed-off-by: Zhong Li <zhongli_dev@126.com>

libavcodec/qsvenc.c

@@ -531,7 +531,7 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
     q->param.mfx.GopPicSize         = FFMAX(0, avctx->gop_size);
     q->param.mfx.GopRefDist         = FFMAX(-1, avctx->max_b_frames) + 1;
     q->param.mfx.GopOptFlag         = avctx->flags & AV_CODEC_FLAG_CLOSED_GOP ?
-                                      MFX_GOP_CLOSED : 0;
+                                      MFX_GOP_CLOSED : MFX_GOP_STRICT;
     q->param.mfx.IdrInterval        = q->idr_interval;
     q->param.mfx.NumSlice           = avctx->slices;
     q->param.mfx.NumRefFrame        = FFMAX(0, avctx->refs);