-DVDemuxContext* dv_init_demux(AVFormatContext* s);
-int dv_get_packet(DVDemuxContext*, AVPacket *);
-int dv_produce_packet(DVDemuxContext*, AVPacket*, uint8_t*, int, int64_t);
+DVDemuxContext* avpriv_dv_init_demux(AVFormatContext* s);
+int avpriv_dv_get_packet(DVDemuxContext*, AVPacket *);
+int avpriv_dv_produce_packet(DVDemuxContext*, AVPacket*, uint8_t*, int, int64_t);