MATROSKA_ID_CUEDURATION  507 libavformat/matroskadec.c     { MATROSKA_ID_CUEDURATION,        EBML_NONE },
MATROSKA_ID_CUEDURATION  483 libavformat/matroskaenc.c                 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION    , entry[j].duration);