diff --git a/libavcodec/vp9_superframe_split_bsf.c b/libavcodec/vp9_superframe_split_bsf.c
index 98f5cc83d0..cddd48119c 100644
--- a/libavcodec/vp9_superframe_split_bsf.c
+++ b/libavcodec/vp9_superframe_split_bsf.c
@@ -51,6 +51,9 @@ static int vp9_superframe_split_filter(AVBSFContext *ctx, AVPacket *out)
             return ret;
         in = s->buffer_pkt;
 
+        if (!in->size)
+            goto passthrough;
+
         marker = in->data[in->size - 1];
         if ((marker & 0xe0) == 0xc0) {
             int length_size = 1 + ((marker >> 3) & 0x3);
@@ -121,6 +124,7 @@ static int vp9_superframe_split_filter(AVBSFContext *ctx, AVPacket *out)
             out->pts = AV_NOPTS_VALUE;
 
     } else {
+passthrough:
         av_packet_move_ref(out, s->buffer_pkt);
     }