FLV_AAC_SEQ_HEADER_DETECT  507 libavformat/flvenc.c             if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) {
FLV_AAC_SEQ_HEADER_DETECT 1100 libavformat/flvenc.c     { "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_AAC_SEQ_HEADER_DETECT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },