ff_flac_write_header  100 libavformat/flacenc.c     ret = ff_flac_write_header(s->pb, codec->extradata,
ff_flac_write_header   29 libavformat/flacenc.h int ff_flac_write_header(AVIOContext *pb, uint8_t *extradata,
ff_flac_write_header  537 libavformat/matroskaenc.c     int ret = ff_flac_write_header(pb, codec->extradata, codec->extradata_size,