AVFMT_NOSTREAMS  2599 ffmpeg.c               if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
AVFMT_NOSTREAMS    98 libavformat/ffmetaenc.c     .flags         = AVFMT_NOTIMESTAMPS | AVFMT_NOSTREAMS,
AVFMT_NOSTREAMS   229 libavformat/mux.c     if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {