@@ -161,17 +161,17 @@ static int decode_frame(AVCodecContext *avctx,

         unsigned needed_size = avctx->width*avctx->height*3;

         if (version == 0) needed_size /= 2;

         needed_size += header_size;

-        if (buf_size != needed_size && buf_size != header_size) {

-            av_log(avctx, AV_LOG_ERROR,

-                   "Invalid frame length %d (should be %d)\n",

-                   buf_size, needed_size);

-            return -1;

-        }

         /* bit 31 means same as previous pic */

         if (header & (1U<<31)) {

             *data_size = 0;

             return buf_size;

         }

+        if (buf_size != needed_size) {

+            av_log(avctx, AV_LOG_ERROR,

+                   "Invalid frame length %d (should be %d)\n",

+                   buf_size, needed_size);

+            return -1;

+        }

     } else {

         /* skip frame */

         if (buf_size == 8) {