@@ -28,6 +28,7 @@

 typedef struct VP9ParseContext {

     int n_frames; // 1-8

     int size[8];

+    int marker_size;

     int64_t pts;

 } VP9ParseContext;

@@ -89,6 +90,21 @@ static int parse(AVCodecParserContext *ctx,

     }

     if (s->n_frames > 0) {

+        int i;

+        int size_sum = 0;

+

+        for (i = 0; i < s->n_frames ;i++)

+            size_sum += s->size[i];

+        size_sum += s->marker_size;

+

+        if (size_sum != size) {

+            av_log(avctx, AV_LOG_ERROR, "Inconsistent input frame sizes %d %d\n",

+                   size_sum, size);

+            s->n_frames = 0;

+        }

+    }

+

+    if (s->n_frames > 0) {

         *out_data = data;

         *out_size = s->size[--s->n_frames];

         parse_frame(ctx, *out_data, *out_size);

@@ -131,6 +147,7 @@ static int parse(AVCodecParserContext *ctx,

                     data += sz; \

                     size -= sz; \

                 } \

+                s->marker_size = size; \

                 parse_frame(ctx, *out_data, *out_size); \

                 return s->n_frames > 0 ? *out_size : full_size