FLV_HEADER_FLAG_HASAUDIO  610 libavformat/flvdec.c     if (flags & FLV_HEADER_FLAG_HASAUDIO)
FLV_HEADER_FLAG_HASAUDIO  424 libavformat/flvenc.c     avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_enc +
FLV_HEADER_FLAG_HASAUDIO 2861 libavformat/rtmpproto.c             rt->flv_data[4] |= FLV_HEADER_FLAG_HASAUDIO;