MATROSKA_ID_SEGMENT  473 libavformat/matroskadec.c     { MATROSKA_ID_SEGMENT,        EBML_NEST, 0, 0, {.n=matroska_segment    } },
MATROSKA_ID_SEGMENT  781 libavformat/matroskadec.c                      if (id == MATROSKA_ID_SEGMENT)
MATROSKA_ID_SEGMENT  643 libavformat/matroskaenc.c     mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);