avpriv_bprint_to_extradata  454 libavcodec/dvdsubenc.c     ret = avpriv_bprint_to_extradata(avctx, &extradata);
avpriv_bprint_to_extradata  312 libavcodec/internal.h int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf);