encoder: h264: Fix Backward ReferencePicture flag setting

This is a regression introduced by e829b62 which
override the reference flags and caused issues with
latest intel-vaapi-driver.

diff --git a/gst-libs/gst/vaapi/gstvaapiencoder_h264.c b/gst-libs/gst/vaapi/gstvaapiencoder_h264.c
index 21d5d19..16e5b43 100644 (file)
--- a/gst-libs/gst/vaapi/gstvaapiencoder_h264.c
+++ b/gst-libs/gst/vaapi/gstvaapiencoder_h264.c
@@ -2027,7 +2027,8 @@ add_slice_headers (GstVaapiEncoderH264 * encoder, GstVaapiEncPicture * picture,
             reflist_1[i_ref]->poc;
         slice_param->RefPicList1[i_ref].flags |=
             VA_PICTURE_H264_SHORT_TERM_REFERENCE;
-        slice_param->RefPicList1[i_ref].flags |= reflist_1[i_ref]->frame_num;
+        slice_param->RefPicList1[i_ref].frame_idx |=
+            reflist_1[i_ref]->frame_num;
       }
       g_assert (i_ref == 1);
     }