av_packet_ref    3885 libavcodec/avcodec.h int av_packet_ref(AVPacket *dst, const AVPacket *src);
av_packet_ref     352 libavcodec/pthread_frame.c     av_packet_ref(&p->avpkt, avpkt);
av_packet_ref     227 libavcodec/qsv_h264.c         ret = av_packet_ref(&input_ref, avpkt);