@@ -149,11 +149,28 @@ static int adts_write_frame_header(ADTSContext *ctx,

 static int adts_write_packet(AVFormatContext *s, AVPacket *pkt)

 {

     ADTSContext *adts = s->priv_data;

+    AVCodecParameters *par = s->streams[0]->codecpar;

     AVIOContext *pb = s->pb;

     uint8_t buf[ADTS_HEADER_SIZE];

     if (!pkt->size)

         return 0;

+    if (!par->extradata_size) {

+        uint8_t *side_data;

+        int side_data_size = 0, ret;

+

+        side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,

+                                            &side_data_size);

+        if (side_data_size) {

+            ret = adts_decode_extradata(s, adts, side_data, side_data_size);

+            if (ret < 0)

+                return ret;

+            ret = ff_alloc_extradata(par, side_data_size);

+            if (ret < 0)

+                return ret;

+            memcpy(par->extradata, side_data, side_data_size);

+        }

+    }

     if (adts->write_adts) {

         int err = adts_write_frame_header(adts, buf, pkt->size,

                                              adts->pce_size);