@@ -59,6 +59,10 @@ int ff_adts_decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t *buf

         av_log(s, AV_LOG_ERROR, "Scalable configurations are not allowed in ADTS\n");

         return -1;

     }

+    if (get_bits(&gb, 1)) {

+        av_log(s, AV_LOG_ERROR, "Extension flag is not allowed in ADTS\n");

+        return -1;

+    }

     if (!adts->channel_conf) {

         init_put_bits(&pb, adts->pce_data, MAX_PCE_SIZE);