flvdemux: export flags for nellymoser through side data.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/flvdec.c

@@ -580,6 +580,8 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
     pkt->dts = dts;
     pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
     pkt->stream_index = st->index;
+    if(st->codec->codec_id == CODEC_ID_NELLYMOSER)
+        av_packet_new_side_data(pkt, 'F', 1)[0]= flags;
 
     if (    stream_type == FLV_STREAM_TYPE_AUDIO ||
             ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||