diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index 7796a68..e8b6245 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -866,6 +866,14 @@ static int get_cv_color_primaries(AVCodecContext *avctx,
             *primaries = NULL;
             break;
 
+        case AVCOL_PRI_BT470BG:
+			*primaries = kCVImageBufferColorPrimaries_EBU_3213;
+            break;
+
+        case AVCOL_PRI_SMPTE170M:
+			*primaries = kCVImageBufferColorPrimaries_SMPTE_C;
+            break;
+
         case AVCOL_PRI_BT709:
             *primaries = kCVImageBufferColorPrimaries_ITU_R_709_2;
             break;
@@ -1302,6 +1310,7 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
         vtctx->get_param_set_func = compat_keys.CMVideoFormatDescriptionGetHEVCParameterSetAtIndex;
         if (!vtctx->get_param_set_func) return AVERROR(EINVAL);
         if (!get_vt_hevc_profile_level(avctx, &profile_level)) return AVERROR(EINVAL);
+        vtctx->has_b_frames = avctx->max_b_frames > 0;
     }
 
     vtctx->session = NULL;